Tag: Iowa storms

Storm Updates: Gulf Coast Slight Flood, Quiet Severe Pulse — Saturday, October 3, 2026

This is the Saturday afternoon Storm Tracker desk for October 3, 2026. The organized severe window is still closed. The Storm Prediction Center 2000 UTC Day 1 convective outlook, updated 2:46 p.m. CDT by Thornton and valid 2000 UTC Saturday through 1200 UTC Sunday, carries no severe thunderstorm areas. The summary line is unchanged from the morning issuance: organized severe thunderstorms are not forecast through tonight. The 20z update made only minor adjustments to the general thunder line.

What is organized this afternoon is water, not wind or hail. Restoration exposure is coastal rain on the central Gulf Coast and the lower Texas coast, plus river stages already above flood stage in eastern Iowa. There is no convective watch, no mesoscale discussion, and no SPC local storm report on the board. Conditions change fast. Verify with the National Weather Service for the specific county or ZIP before you roll.

What is live this afternoon

No convective watches are currently valid. SPC’s watch page, updated 21:16 UTC Saturday, lists none. The most recently issued watch remains Severe Thunderstorm Watch 676. No mesoscale discussions are in effect as of 21:10 UTC; the most recently issued discussion is MD 2345. The national watches-and-warnings text summary does not show a live Severe Thunderstorm Warning or Tornado Warning this afternoon.

SPC local storm reports for the Saturday convective day, 1200 UTC Saturday through 1159 UTC Sunday, show no tornado, hail, or wind reports received as of this desk. The afternoon severe hit list is empty. Showers and low-topped thunderstorms over parts of the Dakotas are spreading into Minnesota. Surface dewpoints are generally in the 40s. A pocket of weak instability can support occasional lightning, and convectively enhanced wind gusts may occur as low-level lapse rates steepen, but SPC keeps the overall severe-wind risk low because instability is minimal.

The Weather Prediction Center Day 1 Excessive Rainfall Outlook, updated 0738 UTC Saturday and valid 12 UTC Saturday through 12 UTC Sunday, still holds a Slight Risk of excessive rainfall for the central Gulf Coast and the lower Texas coast. Forecaster Wegman left both coastal Slight Risk areas in place and kept a higher-end Slight Risk from New Orleans through much of the western Florida Panhandle, citing urban drainage and rainfall volume. There is no Marginal, Slight, Enhanced, Moderate, or High severe-risk area on the Day 1 categorical map.

Hotspot 1 — Central Gulf Coast

A tropical wave moving across the Gulf is funneling record to near-record atmospheric moisture into much of the Gulf Coast. A 15 to 25 knot southerly flow at 850 mb supports numerous showers and thunderstorms into the central Gulf Coast today and tonight. Precipitable water is at or above 2.5 inches for many areas. Cloud cover and the October sun should limit instability away from the coast, so cells that reach the shoreline are not expected to travel far inland without weakening. A weak mid- and upper-level wave centered over the Bay of Campeche is aiding the northward moisture push. SPC still expects this convection to stay disorganized, with weak low-level winds.

WPC’s coast can expect 3 to 6 inches of rain today, with locally higher amounts. Flash-flood guidance is high and soils have been dry, but the volume can still overcome that in urban drainage from New Orleans through the western Florida Panhandle. Mississippi and Alabama coastal counties sit in the same Slight Risk envelope. A nearly stationary front from south and coastal Texas into the Southeast and Carolinas remains the broader thunderstorm focus. Poor lapse rates aloft and weak deep-layer shear should limit organized severe storms along that front through tonight.

Cities and counties to watch: New Orleans and the south-shore and east-bank parishes, coastal Mississippi from Hancock through Jackson County, Mobile and Baldwin counties in Alabama, and the western Florida Panhandle from Pensacola toward Panama City. River products already on the board are not the same as a flash-flood warning. National Weather Service Mobile, issued by New Orleans, has a flood warning for the Styx River near Elsanor in Baldwin County for minor flooding from Sunday evening into Monday morning, with a forecast crest of 12.3 feet early Monday against a 12.0-foot flood stage. A separate flood warning covers the Shoal River near Crestview in Okaloosa County for minor flooding from Monday evening into Thursday morning, crest forecast 9.0 feet Tuesday against an 8.0-foot flood stage.

Restoration read: water first, and only where a warning or measured street flood verifies. Stage extractors and moisture meters for urban low spots and slab-on-grade first floors. This is not a wind or hail board. Do not staff a regional roof crew on a Slight Risk of excessive rainfall. The Styx and Shoal warnings are river-stage tickets for later tonight through early next week, not an afternoon structural-wind call.

Hotspot 2 — Lower Texas coast

The second Slight Risk remains on the coast of Deep South Texas. Onshore northeasterly flow of the same deep tropical moisture may reach urban areas such as Brownsville. Because this stretch of coast sits roughly perpendicular to the mean flow, WPC expects the onshore push to let convection move a few miles inland before it dissipates. No change was made to that Slight Risk area on the 0738 UTC update.

Friday’s central Texas excessive-rain story is a different board. Those time-limited products are not the Saturday Slight Risk. If a river or areal flood warning is still up in central or south-central Texas, treat it as yesterday’s water still in the channel.

Restoration read: Brownsville and the lower Texas coast are the new water ticket if cells train against the coast. Do not send the same crew to the Gulf Coast polygon and a leftover central Texas channel without checking which county has a warning now.

Hotspot 3 — Dakotas into Minnesota, and Iowa river stages

A shortwave trough in the northern mid-level westerlies continues east across the northern Plains and Upper Midwest. Showers and low-topped storms ongoing over parts of the Dakotas spread into Minnesota this afternoon. SPC allows a convectively enhanced gust as lapse rates steepen. The severe risk stays low. There is no watch and no storm report to hang a roof or tree crew on.

Eastern Iowa is the leftover water ticket. National Weather Service Quad Cities flood statements at 9:07 a.m. CDT Saturday keep a major flood warning on the Wapsipinicon River near De Witt 4S, affecting Clinton and Scott counties, until further notice. The stage was 12.9 feet at 8:30 a.m., flood stage is 11.0 feet, and impacts at 13.0 feet include residences along the river. The North Skunk River near Sigourney, Keokuk County, remains in a moderate flood warning until late Sunday night, stage 18.4 feet against a 16.0-foot flood stage, mostly agricultural land. The Skunk River at Augusta, affecting Lee, Henry, and Des Moines counties, remains in a minor flood warning until Sunday evening, stage 16.9 feet against a 15.0-foot flood stage.

Restoration read: the Wapsipinicon near De Witt is the residential river ticket if water is already in yards or first floors. The Skunk statements are mostly agricultural. Neither is a new convective watch, and neither produced an SPC wind or hail report today.

Just hit

The last 24 hours did not add a severe-report ticket. SPC’s Saturday report page has no tornado, hail, or wind reports. Friday night into Saturday morning did not leave a new hail or tornado survey on the filtered report page. The tickets already open are river stages: major flooding on the Wapsipinicon near De Witt, moderate flooding on the North Skunk near Sigourney, and minor flooding on the Skunk at Augusta. Gulf Coast river rises on the Styx and Shoal are forecast products for Sunday night into early next week, not claims already logged this afternoon.

Pulse table

Region	Main threats	SPC / WPC / NWS level	Status this afternoon
Central Gulf Coast (SE LA, coastal MS/AL, western FL Panhandle)	Heavy rain, urban flash flood	WPC Slight, higher-end on the coast	Live today and tonight; 3–6 inches, locally higher
Lower Texas coast (Brownsville)	Onshore heavy rain	WPC Slight	Live; cells may push a few miles inland
Dakotas into Minnesota	Low-topped storms, gusts	No severe area	Spreading east; severe risk low
Southeast front into the Carolinas	General thunderstorms	No severe area	Weak shear, poor lapse rates
Eastern Iowa rivers	River flood, some residences	Flood warnings, not a watch	Wapsipinicon major; Skunk moderate to minor
Baldwin AL / Okaloosa FL rivers	Minor river flood later	Flood warnings issued this morning	Styx Sunday night; Shoal Monday night
U.S. mainland tropics	None	Rachel SW of Baja; no coastal warnings	Not a U.S. land desk

What this means for restoration teams

There is no wind-driven roof board on the Day 1 outlook. A 3-to-6-inch coastal rain is wet drywall, flooring, and a 24-to-48-hour mold clock only where water actually enters. High flash-flood guidance and dry soils mean many miles of the Slight Risk will not produce a claim. Staff the warning, not the polygon. Urban New Orleans through the western Florida Panhandle is the higher-end piece of the same Slight Risk because of drainage, not because a watch is up.

Eastern Iowa is the only residential water ticket already on a river gauge this afternoon, and it is the Wapsipinicon near De Witt, not a statewide Iowa event. Southwest Kansas and central Texas remain yesterday’s water only if a flood statement is still valid. The empty SPC report page means there is no new hail, tree, or tornado survey from today.

What this is not

This is not a derecho, not a tornado outbreak, and not a U.S. hurricane landfall. Hurricane Rachel, Advisory information at 2:00 p.m. MST Saturday, is near 19.8°N, 112.5°W, about 270 miles southwest of the southern tip of Baja California, moving west-northwest at 5 mph, with maximum sustained winds of 80 mph. There are no coastal watches or warnings in effect. A slow west to west-northwest motion continues through the weekend, away from the U.S. mainland. Swells can affect west-central Mexico and the Baja California Peninsula. That is a marine hazard, not a U.S. land ticket. Hurricane warnings on the national summary this afternoon are offshore-waters products for the eastern Pacific within 250 nautical miles of Mexico, not U.S. coastal warnings.

Hurricane Nolo is a Central Pacific system accelerating west and expected to cross the International Date Line on Sunday. It is not a U.S. mainland threat. The Atlantic basin has no tropical cyclones. The Gulf Coast rain is tied to a tropical wave and deep moisture, not to a named storm making landfall.

Looking ahead

The Day 2 convective outlook, issued 12:16 p.m. CDT Saturday and valid 1200 UTC Sunday through 1200 UTC Monday, also carries no severe thunderstorm areas. Severe storms are not forecast for Sunday. An upper low over southern Canada is forecast to intensify as it crosses the northern and eastern Great Lakes, with a leading shortwave moving from the eastern Lakes into the Northeast and a portion of the cold front moving offshore. Scattered thunderstorms are expected ahead of the front and along sea-breeze boundaries, but very weak mid-level lapse rates and little deep-layer shear should keep organization minimal. A sporadic wet microburst is possible near and just offshore the southern Alabama and Florida coasts. Severe potential stays low. Shortwave ridging to the west supports stable conditions over much of the country, with isolated storms possible over a small part of central and southwest Colorado near the higher terrain.

Sources and how to verify

Primary sources: NOAA Storm Prediction Center 2000 UTC Day 1 Convective Outlook for Saturday, October 3, 2026, and the 1730 UTC Day 2 outlook; SPC current watches (none valid); SPC mesoscale discussions (none in effect); SPC storm reports for October 3 (no tornado, hail, or wind reports received); Weather Prediction Center Day 1 Excessive Rainfall Outlook, updated 0738 UTC Saturday; National Weather Service watches, warnings, and advisories summary; National Hurricane Center position on Hurricane Rachel, 2:00 p.m. MST Saturday. Morning desk: Storm Updates: Gulf Coast Slight Flood, Quiet Severe Pulse — Saturday, October 3, 2026 (Morning).

Disclaimer: Informational only — not an official warning. This is an afternoon desk summary of public National Weather Service, Storm Prediction Center, Weather Prediction Center, and National Hurricane Center products. It is not a forecast for a specific address and not a substitute for local NWS products. Watches and warnings expire and get replaced. Confirm the county or ZIP on weather.gov or spc.noaa.gov before travel or work. Turn around, don’t drown.

October 3, 2026

Storm Updates: Kansas Tornado Window, West Texas Wind Slight — Wednesday, September 30, 2026

Wednesday afternoon desk. The organized severe work is on the Plains, not the coasts. As of Wednesday, September 30, 2026, the Storm Prediction Center 1630 UTC Day 1 Convective Outlook still holds a Slight Risk of severe thunderstorms across portions of the southern and central Plains. No convective watches are currently valid. Two mesoscale discussions are live with watches possible. The Weather Prediction Center still holds Moderate Risks of excessive rainfall across portions of the central and southern Plains and the Corn Belt.

These are county- and ZIP-scale thunderstorms and flash-flood corridors. No named tropical cyclone is threatening U.S. land this afternoon. Restoration exposure is wind-driven roof and tree work from southwest Oklahoma into west Texas tonight, a conditional brief-tornado window on the Kansas warm front this evening, and interior water where cells train on already-wet ground from the Red River Valley toward Omaha and Des Moines. Conditions change fast. Verify with the National Weather Service for the specific county or ZIP before you roll.

What is live this afternoon

SPC’s 1630 UTC outlook (issued 11:26 a.m. CDT, valid 1630 UTC Wednesday through 1200 UTC Thursday) keeps two Slight Risk areas: central and eastern Kansas into far southeast Nebraska, and southwest Oklahoma / northwest Texas through the Edwards Plateau. Combined Slight coverage is about 83,861 square miles and 1.63 million people, with Topeka, Abilene, Wichita Falls, Lawton, and San Angelo on the population list. A broader Marginal wraps San Antonio, Dallas, Austin, Fort Worth, and Oklahoma City. Forecasters Mosier and Chalmers: a few tornadoes and localized wind damage are possible across Kansas and possibly far southeast Nebraska this afternoon and evening. Severe wind gusts, some hail, and a brief tornado are also expected from west Texas into southwest Oklahoma this afternoon into tonight.

No Storm Prediction Center convective watches are currently valid. The watch page, updated 2000 UTC Wednesday, still lists Watch 674 as the most recently issued product. That watch is not in effect this afternoon. Two mesoscale discussions are the live signal instead.

Mesoscale Discussion 2337, issued 2:21 p.m. CDT for portions of central Kansas into extreme northern Oklahoma, is tagged Severe potential… Watch possible, with a 60 percent probability of watch issuance. SPC says a few of the stronger storms may produce brief tornadoes, and that a Tornado Watch will likely be needed at some point in the next few hours. Timing is the open question because storm evolution is expected to be slow.

Mesoscale Discussion 2338, issued 2:56 p.m. CDT for portions of western Texas, is tagged Severe potential… Watch possible, with a 40 percent probability of watch issuance. SPC expects at least a few severe gusts and a couple instances of hail if storms increase in coverage and intensity. A Severe Thunderstorm Watch may be needed. Peak wind in that discussion is 55–70 mph. Peak hail is up to 1.25 inches.

WPC’s Day 1 Excessive Rainfall Outlook (updated 0800 UTC Wednesday, valid 12Z Wednesday–12Z Thursday) keeps Moderate Risk language on two corridors: the Front Range into the southern Plains, and the central Plains into the Corn Belt. HREF neighborhood probabilities for more than 3 inches remain 60–90 percent from the Lower Trans Pecos to the central Red River Valley. The Corn Belt footprint is still 2–4 inches, locally around 6 inches, from northern Kansas toward Omaha and Des Moines generally south of I-80.

Hotspot 1 — Central and eastern Kansas into far southeast Nebraska

This is the tornado-window corridor. SPC places the peak around 21Z to 00Z (4 p.m. to 7 p.m. CDT). Cloud cover is expected to linger, so most destabilization is from low-level moisture advection, not full heating. Low-70s dewpoints are forecast over much of central and eastern Kansas by late afternoon. RAP guidance in the 1630 UTC package shows 0–1 km storm-relative helicity of 150–200 m²/s². MD 2337 adds 200–300 m²/s² of 0–3 km SRH along the warm front and the Oklahoma–Kansas border, with backed surface flow. Tornadoes in this kind of tropical, poor-lapse-rate airmass are typically brief. SPC still treats a few longer-duration updrafts as possible.

Cities and counties to watch: Topeka under the Slight list; Wichita under the Marginal wrap; I-70 and Kansas River counties; the state-line counties toward Omaha. Today’s first LSR on the 12Z-to-12Z board is a storm-chaser video report 3 miles south-southwest of Ash Valley in Pawnee County, Kansas, at 2049 UTC (3:49 p.m. CDT). That is a live-cell report, not a damage survey.

Restoration read: tornado plus training rain. A brief tornado is a narrow swath — staff it as a local damage survey. The same warm front is a water job if cells repeat. Do not send one crew to a wind ticket and a flooded basement without checking which county has a warning now.

Hotspot 2 — Southwest Oklahoma, northwest Texas, Edwards Plateau

This remains the higher-confidence wind corridor. Low-70s dewpoints cover much of the southern Plains warm sector. Primary development is expected this evening along modest surface troughing south of the surface low moving into Kansas. An initially supercellular mode is possible from southwest Oklahoma into northwest Texas and the Edwards Plateau, where MLCAPE can reach near or above 1,500 J/kg. Front-parallel flow then favors a linear mode. Severe gusts are the most likely hazard. Isolated hail is more plausible across southwest Texas. A localized brief tornado threat can increase in the evening as effective storm-relative helicity rises.

MD 2338 is the afternoon trigger for western Texas. Surface temperatures there have reached the upper 80s to 90 F. Storms should start multicellular, then become linear as they overspread a dry boundary layer. Cities and counties: Lawton, Wichita Falls, Abilene, San Angelo, the Edwards Plateau counties under the Slight contour, and Midland on the Marginal fringe. An isolated severe threat could linger into parts of central Texas and Oklahoma overnight before buoyancy collapses east of the front.

Restoration read: wind first, water second. Stage tarps, generators, and tree crews before evening initiation, not after the first warning. If a line trains on already-wet ground, treat the same ZIP as a water job by morning.

Hotspot 3 — Southern Rockies, Front Range, and the Corn Belt flood overlay

WPC keeps a Moderate flood risk from the Sangre de Cristos and San Juan Range into the Front Range as northeasterly upslope persists on the northwest side of the surface low. Antecedent wet soils raise the flash-flood probability. Additional 2–4 inches, locally higher, remains the working range, with a second heavy period this evening as the surface low intensifies.

Farther northeast, the Corn Belt Moderate still sits on a southwest-to-northeast axis from northern Kansas through Omaha into Des Moines, generally south of I-80. Hourly rates of 1–2 inches in the better cores, with repeating action on the warm front. North of the warm front the rates drop. That is urban streets, low-water crossings, and small streams first — then finished basements if the same cell trains twice.

Just hit

Today’s 12Z-to-12Z LSR board had been empty until the Pawnee County, Kansas chaser report at 2049 UTC. That is the only official today-board entry as of this desk. Last night’s tickets still stand: a social-media tornado 3 miles south-southeast of Claude in Armstrong County, Texas, at 0012 UTC Tuesday evening; a tornado 7 miles west-northwest of Timbercreek Canyon in Randall County, Texas, at 0245 UTC; 67 mph at Roswell Air Center in Chaves County, New Mexico; 60 mph 2 miles northeast of Roswell; and 65 mph 6 miles west-northwest of Denver City in Yoakum County, Texas. Those are preliminary reports, not damage surveys.

No named tropical cyclone threatens U.S. land this afternoon. NHC is issuing advisories on Hurricane Rachel well south-southwest of Cabo Corrientes, Mexico, Tropical Storm Nolo several hundred miles west of Lihue, Hawaii, and Tropical Depression Nineteen-E over the western East Pacific. Hanna is a remnant low in the central subtropical Atlantic. None of those are a CONUS restoration staffing problem today.

Pulse table

Region	Main threats	SPC / NWS / WPC level	Status this afternoon
Central/eastern KS into SE NE	Brief tornadoes, localized wind, training rain	SPC Slight + MD 2337 (watch possible, 60%)	Peak 4–7 p.m. CDT; no watch yet
SW OK / NW TX / Edwards Plateau	Severe wind, isolated hail, brief tornado	SPC Slight + MD 2338 west TX (watch possible, 40%)	Evening initiation
Red River Valley / west-central TX	Flash flood, merging clusters	WPC Moderate	Late afternoon into Thursday morning
KS–Omaha–Des Moines (south of I-80)	Flash flood, 1–2 in/hr cores	WPC Moderate	Afternoon through overnight
Southern Rockies / Front Range	Upslope heavy rain, flash flood	WPC Moderate	Evening pulse still live
Pawnee County, KS	Live-cell chaser report	Today’s LSR board	2049 UTC / 3:49 p.m. CDT
TX Panhandle / Chaves County NM	Tornado and wind LSRs from Tuesday night	Yesterday’s Marginal	Just-hit / survey
Atlantic / East Pacific vs. U.S. mainland	No landfalling hurricane	Rachel / Nolo / Hanna offshore	Quiet on the mainland coast

What this means for restoration teams

A Slight Risk is not a watch and not a warning. MD 2337 and MD 2338 are the afternoon products that say a watch may still come. Wind at severe criteria is roof, siding, gutter, and tree-on-structure work. A brief tornado, if one occurs in Kansas or on the Edwards Plateau, is a narrow swath. Heavy rain on the two Moderate flood corridors is extraction the same night and a mold clock by Friday.

For teams in central Kansas, southwest Oklahoma, and northwest Texas: stage before the 21Z–00Z window, not after the first warning. Property owners should photograph damage in remaining daylight only if it is safe, call the carrier, and start extraction the same night if water is inside. Turn around, don’t drown on the Front Range and Corn Belt crossings.

What this is not

This is not a regional derecho and not a U.S. mainland hurricane landfall. Rachel is off western Mexico. Nolo is west of Kauai. Hanna is a remnant low in the central Atlantic. The work today, if it verifies, will be scattered: a wind swath through a Texas or Oklahoma county, a brief tornado on the Kansas warm front, a flooded intersection where cells train on the Red River or south of I-80. That is the local-storm pattern this desk should staff.

Looking ahead

The next Day 1 outlook is scheduled by 2000 UTC. SPC Day 2 (1730 UTC package, valid 12Z Thursday–12Z Friday) drops to a Marginal over portions of Kansas, Oklahoma, and Texas for isolated severe wind Thursday afternoon and evening. Watches, if they come tonight, will most likely fire on the Kansas warm front first, then western Texas if coverage increases. Watch the next Storm Tracker update rather than assuming this afternoon’s empty watch list is the last line of the day.

Sources and how to verify

Primary sources: NOAA Storm Prediction Center Sep 30, 2026 1630 UTC Day 1 Convective Outlook; SPC Mesoscale Discussions 2337 and 2338; SPC current convective watches page (no watches valid as of 2000 UTC Wednesday); SPC local storm reports for 20260930 (Pawnee County, Kansas) and 20260929 (overnight Panhandle and New Mexico); Weather Prediction Center Day 1 Excessive Rainfall Outlook updated 0800 UTC Wednesday; National Hurricane Center public pages for Rachel, Nolo, Hanna, and Nineteen-E. Check weather.gov for the county warning, spc.noaa.gov for the outlook, watch, MD, and LSRs, and WPC excessive rainfall for the flood overlay.

Morning desk: Storm Updates: Southern Plains Slight Risk, Kansas Tornado Window — Wednesday, September 30, 2026 (Morning).

Informational only — not an official weather warning. Follow local authorities and the National Weather Service. Turn around, don’t drown.

September 30, 2026

Storm Updates: Mid-Atlantic High Wind, Southern Plains Marginal — Saturday, September 26, 2026

This is a live Saturday afternoon snapshot of U.S. local-storm activity as of Saturday, September 26, 2026. The organized severe desk is a small Marginal over the southern Plains, not a national outbreak. The Storm Prediction Center 2000 UTC Day 1 Convective Outlook, issued 0250 PM CDT and valid 262000Z–271200Z, holds a Marginal Risk of severe thunderstorms late this afternoon and evening from western Oklahoma into northwest Texas. Summary language from Norman: isolated hail and strong outflow winds may accompany thunderstorms across portions of the southern Plains late this afternoon into the early evening. The outlined Marginal covers about 32,889 square miles and roughly 748,515 people, with larger centers including Wichita Falls, Lawton, Enid, Yukon, and Altus. No convective watches are valid. Restoration exposure this afternoon is split: tree and power-line wind on the Mid-Atlantic and southern New England High Wind Warnings, isolated hail and outflow gusts on the Oklahoma–northwest Texas Marginal, and water on the Weather Prediction Center Slight excessive-rainfall areas over Iowa and the coastal Northeast.

Conditions change fast. Verify with the National Weather Service for the specific county or ZIP before you roll.

What is live this afternoon

No tornado or severe thunderstorm watches are current. The SPC watch page states no watches are valid. The last issued convective watch on the board is Watch 674, already expired. No mesoscale discussions are in effect. The 20Z Day 1 update kept the forecast generally on track and made only a slight southward expansion of the 5 percent wind probability. As of 1945 UTC, a deepening cumulus field was noted from West Texas into southwestern Oklahoma, with isolated thunderstorm development ongoing over the higher terrain of southwest Texas. Temperatures had warmed into the upper 80s to mid 90s F, with temperature-dewpoint spreads approaching 30 F in parts of northwest Texas. Steep low-level lapse rates may support isolated strong or damaging outflow gusts, with an instance of large hail also possible farther north where deep-layer shear is marginally stronger. A lack of stronger synoptic-scale forcing, generally modest mid-level flow, and poor mid-level lapse rates are expected to limit overall intensity and coverage.

The Weather Prediction Center Day 1 Excessive Rainfall Outlook, updated 1556 UTC Saturday and valid 16Z Saturday through 12Z Sunday, holds a Slight Risk of excessive rainfall for parts of the coastal Northeast and Iowa. WPC notes a large nor’easter crawling off the Delaware and southern New Jersey coast, with a 986 mb center as of the 16Z discussion. Coastal and tidal flooding, aided by a full moon and the storm’s slow motion, are described as substantially more impactful than rainfall flooding. The Slight was expanded slightly to include urban northern New Jersey and urban central Connecticut. A higher-end Slight that had covered eastern Massachusetts, Rhode Island, and eastern Long Island was dropped with the 16Z update. All of the Northeast sits on the cold, northwest side of the storm, so instability for truly heavy convective rain is lacking. This remains a prolonged light-to-moderate rain event stacked on tides and high wind, not a warm-sector flash-flood outbreak.

Iowa’s Slight was left unchanged for central and southwestern Iowa. High-resolution guidance suggests showers and storms on the nose of a low-level jet this evening and tonight. Wet soils have lowered flash-flood guidance into the 1 to 1.5 inch per hour range. Instability is the limiter, struggling to exceed 500 J/kg. A Marginal Risk also remains over more sensitive parts of West Texas around the Davis Mountains and Stockton Plateau.

High Wind Warnings remain the live non-convective overlay on the Mid-Atlantic and southern New England coast. NWS Mount Holly continues a High Wind Warning until 6 AM EDT Sunday for the Delaware beaches and coastal New Jersey zones including Eastern Monmouth, Atlantic Coastal Cape May, Coastal Atlantic, and Coastal Ocean, with north winds 30 to 40 mph and gusts up to 60 mph. NWS Boston/Norton continues High Wind Warnings until 8 AM EDT Sunday for portions of eastern, northeastern, and southeastern Massachusetts and Rhode Island, with northeast winds 20 to 30 mph and gusts up to 50 to 60 mph depending on zone. Those products are trees and power lines, not SPC severe thunderstorm watches.

Hotspot 1 — Western Oklahoma into northwest Texas

This is the only categorical severe area on the Saturday Day 1 map. The 20Z outlook keeps isolated hail and strong outflow as the hazards late afternoon into early evening. Surface-based storms can still form where heating wins west of leftover morning cloud from southwest Oklahoma into Kansas. Cities inside the Marginal include Wichita Falls, Lawton, Enid, Yukon, and Altus. Isolated thunderstorms were already firing on the higher terrain of southwest Texas by mid-afternoon.

Restoration read: isolated wind and a possible hail stone, not a watch overlay. Staff lightning and a few downed limbs if a cell organizes near Lawton, Altus, or the Wichita Falls side of the Red River. Do not pre-position as if a Slight or Enhanced is coming. Photograph any hail or wind damage in daylight if it is safe.

Hotspot 2 — Jersey Shore, Delaware beaches, southern New England

The live work here is High Wind Warnings plus coastal and tidal flooding under a slow nor’easter, not an SPC convective watch. Mount Holly holds the warning through 6 AM Sunday on the Delaware beaches and the New Jersey coastal strip from Sandy Hook and Eastern Monmouth through Atlantic City, Long Beach Island, and Cape May. Boston/Norton holds through 8 AM Sunday from the North Shore and Boston through the South Coast, Cape Cod, the Islands, and Rhode Island. WPC’s Slight rainfall risk still covers parts of the coastal Northeast, including urban northern New Jersey and urban central Connecticut, but the 16Z discussion is explicit: coastal and tidal flooding matter more than the rain totals.

Restoration read: trees, wires, and wet basements on a long-duration coastal blow. Power outages are the expected ticket language in the NWS impact statements. Do not drive inundated coastal roads at high tide. This is not a hurricane landfall and not a derecho. Hurricane Nolo is a Hawaii desk. Hurricane Polo is a Baja California Sur forecast, not a U.S. East Coast landfall.

Hotspot 3 — Central and southwestern Iowa

WPC left the Slight Risk unchanged at 16Z for central and southwestern Iowa. Cell training along a northwest-southeast stationary front is still possible this evening and tonight on already wet soils. Earlier discussion language also kept eastern Nebraska and far northern Missouri in the broader rain corridor, with some 24-hour amounts able to reach or exceed 2 inches where storms train. Instability stays weak. Occasional mainly elevated thunderstorms remain possible from northeast Oklahoma northward to Iowa per the SPC Day 1 discussion, but that is not a categorical severe area.

Restoration read: water on poor drainage and low crossings tonight, not hail or a wind swath. Check Saturday night into Sunday morning for ponding. Turn around, don’t drown.

Just hit

SPC today’s storm reports for the 1200 UTC September 26 through 1159 UTC September 27 window show no tornado reports, no hail reports, and no wind reports as of this afternoon desk. The severe board is still empty for today’s convective day.

The work that is already a ticket is coastal wind and water on the Mid-Atlantic and southern New England side of the nor’easter, plus leftover runoff from the last several days on the southern High Plains. Those are NWS high-wind and flood products, not today’s SPC local storm reports. Do not reprint Friday’s New Mexico flash-flood warnings as Saturday LSRs.

Pulse table

Region	Main threats	SPC / NWS / WPC level	Status this afternoon
Western OK / northwest TX	Isolated hail, outflow wind	SPC 2000 UTC Marginal	Live late afternoon / evening
DE beaches / NJ coast / southern New England	High wind, trees, tidal flood	NWS High Wind Warnings; WPC Slight rain	Warnings into Sunday morning
Central / southwestern Iowa	Training rain, isolated runoff	WPC Slight	Evening / overnight
West Texas mountains	Localized heavy rain	WPC Marginal	Isolated
CONUS severe watches	None	No watches; last was 674	Quiet
SPC LSRs today	None	0 tornado / 0 hail / 0 wind	Quiet

What this means for restoration teams

Saturday afternoon is a split desk. The convective piece is a small Marginal from western Oklahoma into northwest Texas with no watch and an empty LSR board. Treat that as isolated cells, not a regional wind event. The live volume sits on the Mid-Atlantic and southern New England High Wind Warnings: trees, wires, and wet basements under a slow nor’easter. Iowa is an overnight water check on already wet ground.

Interior water still starts a 24–48 hour mold clock. Photograph in daylight if it is safe. Do not drive flooded coastal roads at high tide or low crossings in Iowa tonight. Hurricane Nolo remains a Hawaii flood-and-wind desk south of the Big Island. Hurricane Polo is forecast for Baja California Sur, not the U.S. mainland. Tropical Storm Gonzalo and Tropical Depression Fay are well out in the eastern and central Atlantic. Do not mix those crew maps with the Jersey Shore wind pile or the Oklahoma Marginal.

What this is not

This is not a regional derecho and not a U.S. mainland hurricane landfall. SPC has one Marginal area and no Slight or higher. No convective watch is up. No mesoscale discussion is up. Today’s LSR board is empty. The nor’easter is a high-wind and coastal-flood event on the cold side of the low, not a tropical cyclone making landfall on the East Coast. That is the local-storm pattern this desk should staff.

Looking ahead

The SPC Day 2 Convective Outlook, issued 1247 AM CDT Saturday and valid 271200Z–281200Z Sunday, carries no severe thunderstorm areas. Summary: severe thunderstorms are not expected Sunday. An upper low is expected to meander over the lower Hudson Valley while ridging prevails over the Plains. Isolated to widely scattered thunderstorms are possible from the Great Basin into the Plains, but overlapping buoyancy and shear look limited. Day 3 also has no severe thunderstorm areas. Sunday’s restoration check is leftover Mid-Atlantic wind damage and any Iowa runoff that verifies overnight, not a new severe outbreak.

Sources and how to verify

Primary sources: NOAA Storm Prediction Center 2000 UTC Day 1 Convective Outlook for Saturday, September 26, 2026 (issued 0250 PM CDT); SPC current watch page (no watches valid; last issued Watch 674); SPC mesoscale discussion page (none in effect); SPC storm reports for 1200 UTC September 26 through 1159 UTC September 27 (no tornado, hail, or wind reports at this desk); Weather Prediction Center Day 1 Excessive Rainfall Outlook discussion updated 1153 AM EDT Saturday; NWS Mount Holly High Wind Warning text; NWS Boston/Norton High Wind Warning text; SPC Day 2 Convective Outlook issued 1247 AM CDT Saturday; National Hurricane Center active-system summaries for Nolo, Polo, Gonzalo, and Fay.

Check weather.gov for the county warning, spc.noaa.gov for the outlook, watch, and LSRs, and WPC excessive rainfall for the flood overlay. Morning desk: Saturday morning, September 26 storm updates.

Informational only — not an official weather warning. Follow local authorities and the National Weather Service. Turn around, don’t drown.

September 26, 2026

Storm Updates: Oklahoma and High Plains Slight Risk — Sunday, September 20, 2026

This is a live Sunday afternoon snapshot of U.S. local-storm activity as of Sunday, September 20, 2026. The organized pulse is still the Storm Prediction Center Slight Risk over central and eastern Oklahoma and from eastern Colorado into far western Kansas. As of 2013 UTC, no convective watches are valid. Overnight Severe Thunderstorm Watches 670, 671, and 672 have expired. Restoration exposure this afternoon and evening is damaging wind and large hail on the Oklahoma and High Plains Slight Risk, leftover interior water where Midwest and Ohio Valley cells trained last night, and a local Florida flash-flood polygon that is not the national headline.

These are county- and ZIP-scale thunderstorms, not a mainland hurricane landfall. Conditions change fast. Verify with the National Weather Service for the specific county or ZIP before you roll.

What is live this afternoon

The SPC 2000 UTC Day 1 Convective Outlook, issued 0244 PM CDT Sunday, September 20, 2026 and valid 202000Z–211200Z, holds a Slight Risk of severe thunderstorms across parts of central and eastern Oklahoma and from eastern Colorado into far western Kansas. The official summary: thunderstorms with severe wind gusts and large hail remain possible this afternoon and evening across those two corridors. Isolated severe gusts and hail are also possible in parts of the southern Plains and from the Ozarks eastward into the Ohio Valley. The 20Z update said the forecast remained generally on track with only minor adjustments.

No watches are currently valid. The most recently issued watch was Severe Thunderstorm Watch 672. Mesoscale Discussion 2316, issued 0149 PM CDT Sunday and valid through 2115 UTC, covers northeast and eastern Colorado, far western Kansas, and southwest Nebraska. Language is severe potential, watch possible, with a 60 percent watch-issuance probability. Isolated storms over northeast Colorado, large hail probable, a few severe gusts possible by early evening. Most probable peak hail size in that MD is 1.50 to 2.50 inches. Most probable peak wind gust 55 to 70 mph.

The Weather Prediction Center Day 1 Excessive Rainfall Outlook, updated 1602 UTC Sunday and valid 16 UTC September 20 through 12 UTC September 21, keeps Slight Risks over portions of the Midwest and Ohio Valley and over the northern High Plains. The 16Z update trimmed the northern edge of the Midwest Slight (northern Illinois, southern Iowa, northern Missouri) and kept the better confidence farther east into the Upper Ohio Valley, where antecedent 24-hour totals already ran 1 to 2 inches areal average and 3 to 4 inches locally. A separate Slight pocket remains focused over southwest South Dakota and the Black Hills on upslope flow and Saturday’s leftover wet ground.

Hotspot 1 — Central and eastern Oklahoma

This is one of the two Slight Risk contours on the 2000 UTC outlook. A surface low sits over central Oklahoma along a cold front that arcs from northeast Oklahoma into southwest Oklahoma and back through the central Texas Panhandle. A shortwave trough is moving into western Oklahoma. The airmass ahead of the front is warm, moist, and moderately buoyant. Mid-level flow is stronger across Oklahoma than across Texas, which is why the organized severe corridor is drawn here rather than over the more disorganized Texas cells. Primary threat language is damaging gusts of 55 to 65 mph, with hail in the stronger cores.

Cities and counties to watch: Tulsa, Broken Arrow, Muskogee, Shawnee, Ardmore, and the rest of the central and eastern Oklahoma Slight contour. Oklahoma City sits near the western edge of the broader risk language even when it is not the center of the Slight.

Restoration read: wind and hail first. Stage tarps, generators, and roof tarping before dark. Photograph roofs in remaining daylight only if it is safe. Do not treat this as a statewide outbreak. It is a corridor.

Hotspot 2 — Eastern Colorado into far western Kansas and southwest Nebraska

This is the other Slight Risk plus MD 2316. Easterly low-level flow north of the surface front is holding 50s F dewpoints across eastern Colorado. Heating plus cool temperatures aloft support moderate destabilization. Storm coverage is expected to stay isolated to widely scattered because of cooler surface temperatures and leftover inhibition, but any storm that matures is favored to be supercellular. Primary severe hazard on the outlook is large hail of 1 to 2.5 inches. Isolated severe gusts are possible. Some lingering severe risk may develop over southeast Colorado late this evening and spread into the Oklahoma Panhandle overnight.

Cities and counties to watch: the Palmer Divide and northeast Colorado, Lamar and the High Plains counties, far western Kansas, and southwest Nebraska where left-split cells can throw hail. Local Severe Thunderstorm Warnings already fired this afternoon in Dundy and Chase Counties, Nebraska.

Restoration read: hail and isolated wind. This is a few strong cells, not a line. Staff it as spot jobs — broken shingles, cracked skylights, vehicle and siding hits — not a regional CAT.

Hotspot 3 — Midwest and Ohio Valley flood leftovers, plus a Florida polygon

WPC keeps a Slight excessive-rainfall risk on last night’s rain axis from central Illinois and east-central Missouri into the Upper Ohio Valley. Antecedent ground is already wet. Training or backbuilding later this evening and overnight could add 2 to 4 inches in the better cores. River and flash-flood products this morning and midday covered eastern Iowa (Quad Cities, Cedar Rapids, Kalona and the English River), the Parkersburg–Athens Ohio River corridor, Charleston and Huntington, Washington County, Pennsylvania, and eastern Ohio counties including Belmont, Guernsey, Harrison, Jefferson, and Tuscarawas. The Des Plaines River near Russell, Illinois, has a new Flood Warning for minor flooding from this afternoon until further notice.

A separate local Flash Flood Warning this afternoon covers southwestern Suwannee County, Florida, with 2 to 3 inches already down. That is a North Florida urban and low-water-crossing desk, not the Slight Risk story.

Restoration read: yesterday’s water is already a ticket in Iowa, Ohio, West Virginia, and western Pennsylvania. Today’s new water, if it verifies, is more of the same corridor plus a standalone Florida polygon. Do not send the Oklahoma hail crew to the Ohio River without checking which county still has a warning.

Just hit

Saturday night’s Severe Thunderstorm Watches 670 (Kansas, Oklahoma, Texas), 671 (Colorado, Kansas), and 672 (Kansas, Missouri) are closed. Those are already on the books as wind and hail tickets across the central Plains and Lower Missouri Valley. Overnight and this morning’s Flash Flood Warnings along the Iowa–Illinois line and the Ohio River are extraction and drying work, not a new watch. This afternoon’s new work, if it verifies, is the Oklahoma wind corridor and High Plains hail cells under MD 2316.

Pulse table

Region	Main threats	SPC / NWS level	Status this afternoon
Central / eastern Oklahoma	Damaging wind 55–65 mph, hail	SPC Slight	Live outlook; no watch
Eastern CO / far western KS / SW NE	Large hail 1–2.5 in, isolated severe gusts	SPC Slight + MD 2316 (watch possible)	Isolated supercells favored
Ozarks to Ohio Valley	Isolated damaging gusts, leftover water	SPC Marginal; WPC Slight flood	Scattered plus aftermath
Northern High Plains / Black Hills	Flash flood on wet ground	WPC Slight excessive rainfall	Afternoon–overnight cells
SW Suwannee County, FL	Local flash flood	NWS Flash Flood Warning	Standalone polygon
Atlantic / EPAC vs. U.S. land	No U.S. landfalling tropical cyclone	NHC: Fay far east-Atlantic; Odalys and TD 17-E over open Pacific	Quiet on the mainland coast

What this means for restoration teams

Oklahoma wind at 55 to 65 mph is roof, siding, gutter, and tree-on-structure work. High Plains hail of 1 to 2.5 inches is shingle and auto work in a few counties, not a multi-state CAT. Midwest and Ohio Valley water from Saturday night is already inside some buildings. That mold clock started this morning, not this evening.

For teams near the Oklahoma Slight or the Colorado–Kansas MD: stage before the first warning, not after. Property owners should photograph damage in daylight if it is safe, call the carrier, and start extraction the same night if water is inside. For teams on the Iowa and Ohio River leftovers: you are already on yesterday’s tickets. Check which gauge is still in flood before you drive.

What this is not

This is not a regional derecho and not a U.S. mainland hurricane landfall. Tropical Storm Fay is in the far eastern Atlantic near 34.4°N, 32.7°W and is not a U.S. land threat this afternoon. Tropical Storm Odalys and Tropical Depression Seventeen-E are over the eastern Pacific, well offshore. The work tonight, if it comes, will be scattered: a wind swath through an Oklahoma county, hail on the High Plains, leftover water in an Iowa or Ohio River town. That is the local-storm pattern this desk should staff.

Looking ahead

Monday’s SPC Day 2 Convective Outlook, issued 1137 AM CDT Sunday, is a Marginal Risk from Mississippi to the central and southern Appalachians. Official summary: a few instances of damaging gusts are possible across the central and southern Appalachians to northern and central Mississippi. Coverage is isolated to widely scattered. Shear is expected to stay weak. Watch the next Storm Tracker update rather than assuming today’s Slight is Monday’s story.

Sources and how to verify

Primary sources, all date-stamped Sunday, September 20, 2026: NOAA Storm Prediction Center 2000 UTC Day 1 Convective Outlook; SPC current watches page (no watches valid as of 2013 UTC); Mesoscale Discussion 2316; Weather Prediction Center Day 1 Excessive Rainfall Outlook updated 1602 UTC; National Hurricane Center public page as of 2120 UTC; National Weather Service watch/warning text including Pittsburgh, Charleston, Chicago, La Crosse, and Tallahassee products. Morning desk for this calendar day: Storm Updates: Oklahoma and High Plains Slight Risk — Sunday, September 20, 2026 (Morning).

Check weather.gov for the county warning, spc.noaa.gov for the outlook, watches, MDs, and LSRs, and WPC excessive rainfall for the flood overlay.

Informational only — not an official weather warning. Follow local authorities and the National Weather Service. Turn around, don’t drown.

September 20, 2026

Storm Updates: Kansas–Oklahoma Watch 670 + Midwest–Montana Flood Moderate — Saturday, September 19, 2026

This is a live Saturday afternoon snapshot of U.S. local-storm activity as of Saturday, September 19, 2026. The organized pulse is on the Central Plains cold front. The Storm Prediction Center 2000 UTC Day 1 Convective Outlook holds a Slight Risk of severe thunderstorms across parts of the central Plains and central High Plains, covering about 56,800 square miles and nearly 2 million people in the Slight contour, with Wichita, Topeka, Lawrence, St. Joseph, and Salina inside the risk area. Severe Thunderstorm Watch 670 is in effect from 3:20 p.m. until 11:00 p.m. CDT for central into northeast Kansas, western into north-central Oklahoma, and the eastern Texas Panhandle.

These are county-scale thunderstorms and training rain, not a U.S. mainland hurricane landfall. Restoration exposure this afternoon and tonight is wind-driven roof and siding work, hail dents on the High Plains, trees on wires in the Southeast leftover cells, and interior water where WPC Moderate flood-risk storms stall over eastern Iowa, northern Illinois, northern Indiana, and southern Montana. Conditions change fast. Verify with the National Weather Service for the specific county or ZIP before you roll.

What is live this afternoon

Watch 670, issued 3:20 p.m. CDT Saturday, September 19, 2026, is the live convective watch. Primary threat language is scattered damaging winds with isolated significant gusts to 75 mph possible, plus isolated large hail to 1.5 inches. The watch box is drawn roughly along and 65 miles either side of a line from 115 miles west-southwest of Alva, Oklahoma, to 35 miles east-southeast of Manhattan, Kansas. SPC Mesoscale Discussion 2309, issued 2:34 p.m. CDT, had already flagged northwest Oklahoma into central and northeast Kansas for watch consideration; that discussion is now overtaken by the watch itself.

The 2000 UTC outlook summary is unchanged from mid-morning: thunderstorms with scattered severe wind gusts and large hail are possible this afternoon and evening across parts of the central Plains. A Marginal Risk still wraps Indianapolis, Columbus, Denver, Kansas City, and Atlanta. Ohio Valley convection has struggled to stay organized along a surging outflow boundary from north of Columbus into southern Illinois and Indiana; SPC trimmed the northern edge of the Marginal there after temperatures behind the outflow fell into the upper 70s.

The Weather Prediction Center Day 1 Excessive Rainfall Outlook, updated 1602 UTC Saturday, September 19, 2026, holds a Moderate Risk of excessive rainfall in portions of the Midwest — particularly eastern Iowa, northern Illinois, and northern Indiana — and a second Moderate Risk over portions of southern Montana. Guidance cited by WPC includes moderate-to-high probabilities of totals exceeding 5 inches in the better Midwest cores, with some low-end probabilities of 8 inches. Day 2 outlook language eases that to a Slight Risk over parts of the Midwest and Ohio Valley on Sunday.

Hotspot 1 — Central into northeast Kansas, western into north-central Oklahoma, eastern Texas Panhandle

This is the live watch. A cold front is dropping south from southwest Iowa through southwest Kansas and the Oklahoma and Texas Panhandles. Ahead of it the airmass is seasonably moist and, by mid-afternoon, moderately unstable. SPC expects a few short-lived supercells early, then high-based storms and line segments capable of 60 to 75 mph gusts. MD 2309 noted temperatures near 100 F from Texas into southern Kansas, dewpoints near 60 F in the eastern Texas Panhandle and mid-60s toward Wichita, and most-probable peak gusts of 65–80 mph with hail of 1.00–1.75 inches.

Cities and counties to watch: Wichita, Topeka, Lawrence, Salina, Manhattan, and St. Joseph on the Missouri side of the Slight contour; Alva and northwest Oklahoma; the eastern Texas Panhandle. A 67 mph gust was already measured 3 miles south-southwest of Freedom in Woodward County, Oklahoma, at 2040 UTC.

Restoration read: wind first, hail second. Stage tarps, generators, and tree crews before dark across the watch. Photograph roofs in remaining daylight only if it is safe. Treat any ZIP that also sits under training rain as a water job by morning.

Hotspot 2 — Eastern Iowa, northern Illinois, northern Indiana flood Moderate

This is the water desk, not the watch. WPC’s 16Z update kept a Moderate Risk of 1-to-6-hour rainfall exceeding flash-flood guidance over eastern Iowa, northern Illinois, and northern Indiana. A surface low over the middle Mississippi Valley and enhanced forcing ahead of it support intense cores and high instantaneous rates. Urban streets, low-water crossings, and small streams fail first. Sunday’s Day 2 ERO drops this corridor to Slight, so tonight into Sunday morning is the higher-end window.

Restoration read: extraction and drying, not hail claims. If a cell trains over the same ZIP for more than an hour, treat it as an occupied-structure water job. Do not send the same crew to the Kansas watch and a Quad Cities flood call without checking which county actually has a warning now.

Hotspot 3 — Central High Plains and southern Montana

SPC holds the Slight Risk west into the central High Plains. Low-level easterly flow is holding upper-50s to low-60s dewpoints. A shortwave moving out of the Great Basin is expected to organize a loosely cellular band into a linear cluster, with hail early and wind later, and some indication the activity continues into western Kansas overnight. Preliminary LSRs already include 1.25-inch hail 5 miles north of Matheson in Elbert County, Colorado, at 2044 UTC, and measured gusts of 59 and 66 mph near Byers in Arapahoe County around 2003–2006 UTC.

Separately, WPC expanded the inherited Moderate excessive-rainfall risk over southern and southeast Montana, matching HREF/RRFS probabilities of rainfall exceeding 3 inches and low-end probabilities over 5 inches. That is a High Plains flood and debris-flow desk in burn scars and small drainages, not the Kansas watch.

Restoration read: Colorado and western Kansas are wind-and-hail tickets tonight. Southern Montana is water and mud. Do not conflate the two.

Just hit

SPC today’s storm reports (1200 UTC September 19 through the afternoon) show no tornadoes as of this desk. Hail: quarter-size near Rome in Floyd County, Georgia, at 1935 UTC; 1.25-inch north of Matheson, Colorado. Wind: trees and power lines down at Signal Mountain and South Pittsburg, Tennessee; trees and blocked roads in Etowah and Jackson Counties, Alabama; multiple trees down near Warm Springs and Highland Park, Georgia; 59–66 mph near Byers, Colorado; 67 mph near Freedom, Oklahoma. Those tree and wire reports are already tickets.

A morning Storm Tracker for this calendar day is already on the site: Storm Updates: Kansas Slight Risk + Midwest–Montana Flood Moderate — Saturday, September 19, 2026 (Morning). This afternoon post is the watch-and-LSR update, not a reprint of Friday.

Pulse table

Region	Main threats	SPC / NWS level	Status this afternoon
Central / NE Kansas, W / NC Oklahoma, E Texas Panhandle	Damaging wind 60–75 mph, isolated 1.5-inch hail	Slight + Watch 670 to 11 p.m. CDT	Live watch
Eastern Iowa / northern Illinois / northern Indiana	Flash flood, training heavy rain	WPC Moderate excessive rainfall	Tonight into Sunday morning
Southern / southeast Montana	Flash flood, 3–5 inch cores	WPC Moderate excessive rainfall	Today into tonight
Central High Plains / NE Colorado	Wind, marginally severe hail	Slight / Marginal	Live LSRs near Byers and Matheson
Ohio Valley (IN / OH / IL outflow)	Isolated damaging gusts	Marginal, trimmed on north edge	Poorly organized
Southern Appalachians / Southeast	Trees, 50–60 mph wet microbursts	Marginal / local SVR	Just-hit trees in TN, AL, GA
Atlantic vs. U.S. mainland	TD Six near the Azores; no U.S. land threat	No mainland tropical watch	Quiet on the coast

What this means for restoration teams

Wind at 60–75 mph inside Watch 670 is roof, siding, gutter, and tree-on-structure work from Wichita through Topeka and across northwest Oklahoma. Hail to 1.5 inches is a vehicle and roof-dent ticket, not a regional catastrophe. Midwest Moderate flood risk is wet drywall and a 24–48 hour mold clock if occupied structures take water. Southern Montana is the same water problem on different terrain.

For teams in or near Watch 670: stage before 5 p.m. CDT, not after the first warning. Property owners should photograph damage in daylight if it is safe, call the carrier, and start extraction the same night if water is inside. Southeast tree jobs from this afternoon’s Alabama, Georgia, and Tennessee cells are already on the board.

What this is not

This is not a regional derecho and not a U.S. mainland hurricane landfall. Tropical Depression Six is several hundred miles southwest of the Azores with 35 mph winds and no coastal watches for the United States. The work tonight, if it verifies, will be scattered: a wind swath through a Kansas or Oklahoma county, a flooded intersection where Iowa or Illinois cells train, isolated hail on the High Plains, leftover trees in the Tennessee Valley. That is the local-storm pattern this desk should staff.

Looking ahead

Sunday’s SPC Day 2 outlook remains a Slight Risk of severe thunderstorms over parts of the central High Plains and southern Plains. WPC Day 2 excessive rainfall eases the Midwest corridor to Slight. Day 3 convective risk is Marginal. Later in the week WPC language flags a wetter pattern for the Southern High Plains and Rockies, and a frontal system toward the East midweek. Watch the next Storm Tracker rather than assuming Watch 670 is the last line of the weekend.

Sources and how to verify

Primary sources dated Saturday, September 19, 2026: NOAA Storm Prediction Center 2000 UTC Day 1 Convective Outlook; Severe Thunderstorm Watch 670; Mesoscale Discussion 2309; SPC today’s local storm reports; Weather Prediction Center Day 1 Excessive Rainfall Outlook updated 1602 UTC; National Hurricane Center advisories on Tropical Depression Six (Azores, no U.S. land threat). Morning desk on this calendar day: September 19 morning Storm Updates.

Check weather.gov for the county warning, spc.noaa.gov for the outlook, watch, and LSRs, Watch 670 text, and WPC excessive rainfall for the flood overlay.

Informational only — not an official weather warning. Follow local authorities and the National Weather Service. Turn around, don’t drown.

September 19, 2026

Storm Updates: Carolinas Wind Pulse + Upper Mississippi Flood Slight — Friday, September 18, 2026

This is a live Friday afternoon snapshot of U.S. local-storm activity as of Friday, September 18, 2026. The Storm Prediction Center 2000 UTC Day 1 Convective Outlook holds a Marginal Risk of isolated severe thunderstorms from the Carolina Piedmont into northern Georgia, northern Iowa, parts of the central High Plains, and parts of the Intermountain West. No convective watches are valid. Mesoscale discussions referenced in the 2000 UTC package (MCDs 2306 and 2307) are no longer in effect. The Weather Prediction Center Day 1 Excessive Rainfall Outlook is the organized ticket: Slight Risk over portions of the Upper Mississippi Valley and a second Slight Risk over southwest Montana. There is no named tropical cyclone in the Atlantic, eastern Pacific, or central Pacific.

These are county- and ZIP-scale thunderstorms and flash-flood pulses, not a mainland hurricane landfall. Restoration exposure this afternoon is wind and trees already verifying across central North Carolina, isolated hail leftover from Intermountain cells, and water tonight from southeast Minnesota into west-central Wisconsin. Conditions change fast. Verify with the National Weather Service for the specific county or ZIP before you roll.

What is live this afternoon

SPC issued the 2000 UTC Day 1 Convective Outlook at 0241 PM CDT, valid 182000Z–191200Z. Forecasters Chalmers and Wendt made only minor adjustments from the midday package. Headline: an isolated severe risk continues for portions of the Carolinas into northern Georgia and parts of the Intermountain West. Isolated severe storms are also forecast later today across portions of northern Iowa and parts of the central High Plains. Risk-area population centers listed by SPC include Charlotte, Atlanta, Raleigh, Greensboro, and Durham. Categorical risk is Marginal only. No Slight Risk on Day 1. No tornado probabilities in the 2000 UTC categorical headline. Risk-area size on the 2000 UTC graphic is about 179,316 square miles covering roughly 19.6 million people.

Current convective watches: none. SPC watch page last updated 1805 UTC Friday: no watches currently valid. Most recently issued watch remains Severe Thunderstorm Watch 669, already expired. Do not treat 669 as a live product.

The 2000 UTC discussion points to MCDs 2306 and 2307 for additional information. By late afternoon the live MD list showed no mesoscale discussions currently in effect. Most recently issued discussion on the current-MD page was 2305. Treat those numbers as the latest issued discussions, not standing watches.

WPC Day 1 excessive-rainfall language valid 16Z Friday through 12Z Saturday holds Slight Risk for portions of the Upper Mississippi Valley and southwest Montana. The 16Z update expanded the eastern edge of the Slight and high-end Slight about one to two counties into southeast Wisconsin and northeast Illinois, where recent heavy rain left the ground sensitive. Highest amounts still focus over southeast Minnesota and west-central Wisconsin, with model-consensus QPF in the 2 to 4 inch range. A separate Slight Risk covers southwest Montana. Marginal Risk remains over South Florida and the Keys, a remnant Intermountain/Southwest terrain corridor, a Northern Plains strip, and a thin Ohio Valley pocket. WPC’s short-range discussion already flags a Moderate Risk of excessive rainfall Saturday over parts of the Upper Great Lakes into the Middle Mississippi Valley. That is tomorrow’s water upgrade, not today’s Day 1 map.

Hotspot 1 — Carolina Piedmont into northern Georgia

A wavy stationary front this morning ran from southern Illinois through southern Indiana and southern Ohio into southwest Pennsylvania. Decaying showers preceded it from southern Illinois into northern Kentucky. The boundary is shifting south as cooler air follows a shortwave through southern Quebec and the Canadian Maritimes. The front is relatively weak, but it is interacting with a warm, moist, diurnally destabilized airmass across the Carolina Piedmont and northern Georgia. Precipitable water is over 2 inches. Vertical shear is weak. Storm mode is outflow-dominant. The risk is occasionally strong downbursts, not a long-lived supercell corridor.

That language already verified this afternoon. Preliminary LSRs on the 18/1200Z cycle include a 69 mph gust at KGSO (5 ESE Colfax, Guilford County), a 66 mph gust at KFAY (4 ENE Hope Mills, Cumberland County), trees down on I-85 near Route 68, trees blocking roads in Randolph, Davie, Iredell, Rowan, Chatham, and Moore counties, and a power-company outage from downed trees northwest of Craven in Rowan County. Those are trees-on-pavement and trees-on-wires tickets in the Charlotte–Greensboro–Fayetteville corridor, not a watch-scale outbreak.

Restoration read: wind first. Stage tree, tarp, and board-up capacity for the Piedmont counties that already have LSRs. Hail is not the lead threat on this corridor. Water is secondary unless a cell trains over the same ZIP that already took a 2-inch precipitable-water plume.

Hotspot 2 — Upper Mississippi Valley water

A Northern Plains disturbance continues east from the Dakotas across southern Minnesota into Wisconsin tonight. WPC keeps the Slight Risk and high-end Slight focused on southeast Minnesota and west-central Wisconsin, with the eastern edge nudged into southeast Wisconsin and northeast Illinois because those counties already took rain. Local NWS language from La Crosse this afternoon still has 1–3 inches likely and 4–6 inches possible in pockets, with a Flood Watch south of I-94 and rivers such as the Kickapoo at Gays Mills and Viola and the Cedar at Charles City expected to reach minor flood stage if the heavier corridor verifies.

SPC’s northern Iowa Marginal is a separate overlay: elevated storms tonight on warm-air advection and a moderate low-level jet, with isolated hail the primary severe hazard and a strong gust or two if any linear structures develop. That is hail and wind on the southern edge of the water corridor, not a Slight Risk severe day.

Restoration read: water first from southeast Minnesota through west-central Wisconsin into northeast Iowa tonight. Extraction and wet-drywall clocks start the same night if water is inside. Do not send the same crew to a Piedmont tree job and a Kickapoo basement without checking which county has a warning now.

Hotspot 3 — Intermountain West and central High Plains

A shortwave trough continues east into southern Idaho and northern Utah. Highs stay relatively cool — upper 60s in southern Idaho, low to mid 70s in northern Utah — but cold temperatures aloft plus strong deep-layer shear still support organized updrafts. Isolated severe gusts and small hail remain the SPC language. That already verified on today’s LSR cycle: 1.50-inch hail 2 W of Kaysville in Davis County, Utah, and quarter-size hail near Farmington in San Juan County, New Mexico.

On the High Plains, a mid-level vorticity maximum lifting north-northeast later this evening may support isolated severe gusts and a conditional, less-than-5-percent hail risk if a more cellular mode holds into better low-level moisture near the Colorado–Nebraska–Kansas border. Storms may grow upscale into a small eastward-moving cluster this evening. Isolated outflow surges, not a derecho.

Restoration read: hail first if cells verify over the Wasatch Front or the Four Corners. Wind second if High Plains clusters organize. Flash-flood risk on this corridor is Marginal to isolated except for the separate southwest Montana Slight Risk, where WPC introduced Slight coverage after Thursday’s cell behavior and 0.5–1.5 inch guidance.

Just hit

SPC preliminary storm reports for the current 18/1200Z–19/1159Z cycle already include one brief landspout at Lighthouse Point in Broward County, Florida (palm fronds lofted; no damage path described as a supercell tornado), quarter to 1.50-inch hail in San Juan County, New Mexico, and Davis County, Utah, and a long list of North Carolina wind reports from Davie, Guilford, Randolph, Cumberland, Iredell, Rowan, Chatham, and Moore counties, including measured 69 mph at Greensboro and 66 mph at Fayetteville.

The last 24-hour ticket pile on the prior cycle (17/1200Z–18/1159Z) is the Idaho hail outbreak the morning desk already logged: tennis-ball hail (2.50 inches) near Rose in Bingham County, golf-ball hail in Blackfoot and Shelley, quarter to 1.25-inch hail across Bingham, Blaine, Jefferson, and Bear Lake counties, plus 1.50-inch hail at Midway, Wasatch County, Utah, and 1.50-inch hail near Broadwater, Morrill County, Nebraska. Wind on that cycle included power lines down at Lewisville, Jefferson County, Idaho; a 61 mph gust south-southwest of Mud Lake; trees in Beavercreek, Greene County, Ohio; a tree-fall injury in Ashland, Boyd County, Kentucky; and trees in Tippecanoe and Carroll counties, Indiana. A brief tornado touchdown was reported 11 NNE of Chappell in Garden County, Nebraska. Those products are expired. The roofs and cars in Bingham County are still the ticket.

This morning’s Storm Tracker already covered the 1300 UTC outlook family. This afternoon desk updates to the 2000 UTC package, confirms still-zero watches, and adds the live North Carolina LSR cluster and the WPC 16Z flood-edge nudge into southeast Wisconsin and northeast Illinois.

Pulse table

Region	Main threats	SPC / NWS / WPC level	Status this afternoon
Carolina Piedmont / northern GA	Downburst wind, trees, wires	SPC Marginal	Live — LSRs already in
SE MN / west-central WI / NE IA	Flash flood, 2–4″ swaths	WPC Slight (high-end core)	Tonight’s organized water ticket
Northern Iowa / far southern MN	Isolated hail, isolated gusts	SPC Marginal	Elevated storms tonight
Southern ID / northern UT / Four Corners	Isolated hail and severe gusts	SPC Marginal	Live cells; 1.50″ hail at Kaysville
Central High Plains	Isolated severe gusts	SPC Marginal	Evening cluster if heating holds
Southwest Montana	Flash flood, 0.5–1.5″	WPC Slight	Diurnal terrain cells
South Florida / Keys	Urban flooding, landspout noise	WPC Marginal	Diurnal; one brief landspout LSR
Bingham County ID (overnight)	Tennis-ball to golf-ball hail	LSRs prior cycle	Just-hit
Atlantic / Gulf vs. U.S. mainland	No named cyclone	NHC: no tropical cyclones	Quiet on the mainland coast

What this means for restoration teams

The live ticket this afternoon is wind on the Carolina Piedmont: trees, wires, and a measured 66–69 mph pair at Greensboro and Fayetteville. Isolated Intermountain hail is a roof and auto-glass survey if cells keep firing over the Wasatch Front or Farmington, New Mexico. The organized ticket tonight is still water from southeast Minnesota through west-central Wisconsin. Idaho’s overnight tennis-ball hail around Blackfoot, Rose, and Shelley is a separate just-hit staffing problem from this afternoon’s Piedmont wind.

For teams near the Carolina Marginal: the warnings and LSRs are already out. Photograph damage in daylight if it is safe, call the carrier, and start extraction the same night if water is inside. Turn around, don’t drown on Upper Mississippi and Montana washes.

What this is not

This is not a Slight Risk severe day, not a live convective watch, and not a U.S. mainland hurricane landfall. MCDs 2306 and 2307 are not watches. The Broward landspout is a brief landspout LSR, not a tornado outbreak. NHC reports no tropical cyclones in the Atlantic, eastern Pacific, or central Pacific as of this afternoon. The work, if it keeps verifying, will be scattered: a tree swath through a Piedmont county, a hail report on the Wasatch Front, and heavier rain over southeast Minnesota and west-central Wisconsin tonight.

Looking ahead

SPC Day 2 (Saturday) holds a Slight Risk of severe thunderstorms late Saturday afternoon and evening from northwest Oklahoma into eastern Kansas, with more isolated severe storms possible across the central High Plains, central Rockies, and the Midwest to Southeast. The 1730 UTC Day 2 summary calls for scattered severe wind and hail-producing storms on the central Plains. WPC already has a Moderate Risk of excessive rainfall Saturday over parts of the Upper Great Lakes into the Middle Mississippi Valley. The next Storm Tracker update should re-check the 0100 UTC Day 1 outlook, any new watches, and whether that Moderate flood risk is the morning headline rather than assuming today’s Marginal stays the last word.

Sources and how to verify

Primary sources: NOAA Storm Prediction Center Sep 18, 2026 2000 UTC Day 1 Convective Outlook (Chalmers/Wendt); Day 2 Convective Outlook; current convective watches (none valid; last issued Watch 669); current mesoscale discussions (none in effect); SPC preliminary storm reports for the 20260918 cycle and 20260917 cycle; Weather Prediction Center Day 1 Excessive Rainfall Outlook (Campbell, 332 PM EDT Fri Sep 18, 2026); National Hurricane Center Tropical Weather Outlook, September 18, 2026 (no tropical cyclones in the Atlantic, eastern Pacific, or central Pacific).

Check weather.gov for the county warning, spc.noaa.gov for the outlook, watch, MD, and LSRs, and WPC excessive rainfall for the flood overlay. Morning desk for this calendar day: Storm Updates: Carolinas–Georgia + Iowa Marginal, Upper Mississippi Flood Slight — Friday, September 18, 2026 (Morning).

Informational only — not an official weather warning. Follow local authorities and the National Weather Service. Turn around, don’t drown.

September 18, 2026

Storm Updates: Kansas–Missouri Flood Moderate, Plains–Midwest Marginal — Tuesday, September 15, 2026

This is a live Tuesday afternoon snapshot of local storm-type events across the United States as of Tuesday, September 15, 2026. The Storm Prediction Center 2000 UTC Day 1 Convective Outlook keeps a Marginal Risk of severe thunderstorms from the south-central Plains into parts of the Midwest. No convective watches are in effect. The organized story this afternoon is water: the Weather Prediction Center Day 1 Excessive Rainfall Outlook holds a Moderate Risk from northeastern Kansas into northwest Missouri, with a high-end Slight Risk wrapping the Kansas City metro and I-70 corridor.

These are county- and ZIP-scale thunderstorms, not a mainland hurricane landfall. Restoration exposure tonight is flash-flood water first, then isolated wind-driven roof and tree work where the front fires cells. Conditions change fast. Verify with the National Weather Service for the specific county or ZIP before you roll.

What is live this afternoon

SPC issued the 2000 UTC Day 1 outlook at 2:55 p.m. CDT Tuesday, September 15, 2026, valid through 7:00 a.m. CDT Wednesday. The categorical call is Marginal. Population centers listed in the risk area include Indianapolis, Kansas City, Wichita, St. Louis, and Toledo. Summary language: strong to locally severe thunderstorms may occur from the south-central Plains into parts of the Midwest this afternoon and evening, with at least isolated damaging wind gusts possible. SPC explicitly opted against a categorical upgrade. As of the SPC watches page update Tuesday afternoon, no watches are currently valid. The most recently issued watch was Tornado Watch 669 on Monday.

Mesoscale Discussion 2300, issued 1:59 p.m. CDT, covered the Texas Panhandle into central Kansas. Watch issuance probability was 20 percent. Language: thunderstorm coverage increasing; sporadic strong gusts, with a locally greater chance of 50–65 mph from northwest Oklahoma into south-central and east-central Kansas. Most probable peak wind up to 60 mph; hail up to 1.25 inches. A watch was not anticipated. By late afternoon the current-MCD page showed no mesoscale discussions in effect.

WPC’s Day 1 Excessive Rainfall Outlook, updated 1556 UTC Tuesday and valid 16 UTC Tuesday through 12 UTC Wednesday, is the higher-confidence overlay. Moderate Risk covers portions of northeastern Kansas into northwest Missouri and clips far southeast Nebraska along the Missouri River. Guidance supports 2–3 inch areal averages and locally 3–5 inches from just north of Topeka toward St. Joseph. Flash-flood guidance is already low after morning rain. A high-end Slight Risk surrounds that core, including the Kansas City metro and I-70. A separate Slight Risk remains over eastern Arizona and western New Mexico on monsoon-style cells.

National Hurricane Center: no tropical cyclones in the Atlantic. Tropical Depression Fifteen-E is weakening well out in the eastern Pacific (about 15.7°N, 125.0°W, 30 mph). Post-tropical Norbert is a remnant low far from U.S. land. Neither threatens the U.S. mainland this afternoon.

Hotspot 1 — Northeast Kansas into northwest Missouri

This is the live flood desk. WPC broadened the Moderate Risk on the 16Z update to match an uptick in amounts and coverage near the Kansas–Nebraska–northwest Missouri juncture. Cold front slides southeast; best heavy-rain window is late afternoon through overnight as the low-level jet injects moisture along a boundary-parallel flow. Neighborhood probabilities for greater than 1 inch per hour have run 40–70 percent for several hours in the core.

Cities and counties to watch: Topeka and northeastern Kansas counties north of I-70; St. Joseph and neighboring northwest Missouri counties; far southeast Nebraska along the Missouri River; the Kansas City metro on the high-end Slight, not inside the Moderate core but close enough that a southward shift matters.

Restoration read: water first. Stage extractors and drying kits for basements, slab leaks, and low-water crossings that fail after dark. Morning rain already lowered flash-flood guidance. Photograph interiors only if it is safe. Do not treat Kansas City the same as St. Joseph without checking which county has a warning now.

Hotspot 2 — South-central Kansas, northern Missouri, and the cold-front wind line

SPC’s 20Z update said locally greater potential for a couple of damaging or severe wind gusts may exist across south-central Kansas and northern Missouri where guidance shows greater storm coverage on the cold front. Enhanced deep-layer shear is displaced north of the boundary; better thermodynamics sit farther south. That split is why the outlook stayed Marginal. Earlier MCD 2300 language pointed at northwest Oklahoma into south-central and east-central Kansas for 50–65 mph gusts if cells organize.

Cities and counties to watch: Wichita and south-central Kansas; northwest Oklahoma; northern Missouri counties along and north of the front; scattered cells from the Texas Panhandle east-northeast toward Illinois as convective temperatures are reached.

Restoration read: isolated wind, not a line you staff like a Slight-plus-watch night. Tarps and tree crews if a Severe Thunderstorm Warning verifies. Hail is secondary and limited by warm temperatures aloft.

Hotspot 3 — Four Corners / Southwest rain and leftover Plains wind tickets

Isolated to widely scattered thunderstorms had formed across the Four Corners by about 1930 UTC. SPC notes weak buoyancy in a deep, well-mixed boundary layer — enough for an isolated strong to perhaps severe cell, not a concentrated severe area. WPC keeps a Slight Risk of excessive rainfall over eastern Arizona and the western half of New Mexico, with locally 2–3 inches in the hardest terrain.

Yesterday’s organized wind corridor is already tickets. SPC storm reports for the 1200 UTC September 14–15 window include measured gusts of 87 mph near Guide Rock, Nebraska; 83 mph near Smith Center, Kansas; 77 mph near Amy, Kansas; 76 mph near Beatrice, Nebraska; 75 mph near Elmwood, Nebraska; plus trees and power lines in Cass and Lancaster Counties, Nebraska, Clarinda and Ames, Iowa, and other High Plains points. Today’s 1200 UTC-forward LSR page still showed no tornado, hail, or wind reports as of this afternoon scan. That can change after dark.

Restoration read: Southwest is flash-flood and outflow in terrain. Nebraska–Kansas–Iowa wind from Monday night is roof, siding, and tree-on-drop work already on the books.

Just hit

Monday evening’s Tornado Watch 669 (western into central Iowa, far northwest Missouri, eastern Nebraska, effective 4:50 p.m. until midnight CDT Monday) is closed. The gust and tree reports listed above are that corridor. Iowa river and urban water from the last two days can still be in the channel even if today’s new Moderate Risk sits farther southwest. Today’s new work, if it verifies, is flash flooding on the Kansas–Missouri Moderate Risk plus isolated wind along the front. No new U.S. mainland tropical landfall.

Pulse table

Region	Main threats	SPC / NWS level	Status this afternoon
NE Kansas / NW Missouri / SE Nebraska	Flash flood, training heavy rain	WPC Moderate excessive rainfall	Live flood overlay; evening peak
Kansas City / I-70 corridor	Heavy rain, urban flooding	WPC high-end Slight	Watch the southward shift
South-central KS / N Missouri / NW OK	Isolated damaging wind	SPC Marginal; MCD 2300 watch unlikely	No watch; scattered cells
Plains–Midwest Marginal envelope	Isolated wind, lightning	SPC Marginal (~166,470 sq mi)	Disorganized vs Monday night
Eastern AZ / western NM	Flash flood, strong outflow	WPC Slight	Afternoon–overnight terrain cells
NE / KS / IA just-hit wind	Roof, trees, service drops	Monday Watch 669 closed	Aftermath tickets
Atlantic / Gulf vs. U.S. mainland	No landfalling tropical cyclone	NHC quiet on the mainland	Quiet

What this means for restoration teams

Water on a Moderate Risk with already-wet ground is wet drywall and a 24–48 hour mold clock, plus vehicles in flooded crossings. Isolated 50–65 mph gusts are roof, siding, gutter, and tree-on-structure work in a single county, not a regional wind event. Monday night’s 70–87 mph measured gusts in southern Nebraska and north-central Kansas are the jobs already called in.

For teams near Topeka, St. Joseph, and Kansas City: stage extraction before the overnight training window, not after the first flooded intersection. Property owners should photograph damage if it is safe, call the carrier, and start extraction the same night if water is inside. Turn around, don’t drown.

What this is not

This is not a regional derecho and not a U.S. mainland hurricane landfall. SPC did not upgrade to Slight. No convective watch is out this afternoon. Tropical Depression Fifteen-E and remnant Norbert are Pacific and offshore. The work tonight, if it comes, will be scattered: a flooded county in northeast Kansas or northwest Missouri, an isolated wind swath on the front, leftover tree jobs from Monday night. That is the local-storm pattern this desk should staff.

Looking ahead

SPC Day 2 remains generally quieter on organized severe over the central United States. A Marginal Risk of severe thunderstorms is flagged Wednesday morning across the Great Salt Lake / Salt Lake City vicinity. Along the remnant front from the Ohio Valley into the lower Missouri Valley, scattered strong storms are possible Wednesday afternoon in weak shear, without a 5 percent severe-wind area on the 0600 UTC Day 2 package. Day 3 language available this afternoon showed no severe thunderstorms. Watch the next Storm Tracker update rather than assuming tonight’s flood core is the last line of the week.

Sources and how to verify

Primary sources dated Tuesday, September 15, 2026: NOAA Storm Prediction Center 2000 UTC Day 1 Convective Outlook (issued 2:55 p.m. CDT); SPC Current Watches page (no watches valid; last watch 669); Mesoscale Discussion 2300; SPC storm reports for 20260914 and 20260915; Weather Prediction Center Day 1 Excessive Rainfall Outlook updated 1556 UTC; National Hurricane Center public page as of 21:06 UTC. Morning desk on the same calendar day: Storm Updates, Tuesday morning, September 15, 2026.

Check weather.gov for the county warning, spc.noaa.gov for the outlook, watches, MCDs, and LSRs, and WPC excessive rainfall for the flood overlay.

Informational only — not an official weather warning. Follow local authorities and the National Weather Service. Turn around, don’t drown.

September 15, 2026

Storm Updates: Eastern Nebraska–Iowa Slight Risk, Watch 668 Kansas–Nebraska, Iowa Flood Moderate — Monday, September 14, 2026

This is a live Monday afternoon snapshot of local storm-type events across the United States as of Monday, September 14, 2026. The Storm Prediction Center 2000 UTC Day 1 Convective Outlook holds a Slight Risk of severe thunderstorms across northern Kansas and southern and eastern Nebraska into western and central Iowa. Severe Thunderstorm Watch 668, issued at 3:45 p.m. CDT, covers western and northern Kansas and south-central Nebraska until 10:00 p.m. CDT. The Weather Prediction Center Day 1 Excessive Rainfall Outlook, valid 12 UTC Monday through 12 UTC Tuesday, keeps a Moderate Risk over portions of central and southwestern Iowa.

These are county-scale thunderstorms and flash-flood pulses, not a U.S. mainland hurricane landfall. Restoration exposure tonight is wind-driven roof and tree work in the watch, isolated hail, a conditional tornado in the eastern Nebraska–western Iowa corridor if a surface-based supercell holds, and interior water where Iowa cells train. Conditions change fast. Verify with the National Weather Service for the specific county or ZIP before you roll.

What is live this afternoon

Watch 668 is the organized wind desk. SPC issued it at 3:45 p.m. CDT Monday, September 14, 2026, for portions of western and northern Kansas and south-central Nebraska, effective until 10:00 p.m. CDT. Primary threat language is scattered damaging winds and isolated significant gusts to 80 mph, plus isolated large hail to 1.5 inches. High-based storms are expected to continue in a hot, well-mixed environment and spread northeast near a pre-frontal trough.

The 2000 UTC Day 1 outlook, issued 3:00 p.m. CDT by Karstens and Wendt, did not change the categorical Slight Risk. Summary language: scattered strong to severe thunderstorms should occur across parts of eastern Nebraska into western and central Iowa this afternoon and evening. Large hail, severe wind gusts, and tornadoes all appear possible. Severe thunderstorm winds will also be possible across northern and western Kansas. An 18z Omaha sounding showed about 2,232 J/kg MUCAPE as destablization spread north into central and eastern Nebraska. SPC still expects an elongated area of convection from north-central Kansas into south-central and eastern Nebraska and west-central Iowa, favoring supercells early, then a quick transition to clusters and line segments. Exact initiation remains uncertain in recent HRRR and RRFS runs. No SPC mesoscale discussion was in effect as of mid-afternoon UTC; Watch 668 is the current watch product.

WPC’s Day 1 excessive-rainfall discussion, issued 3:40 a.m. EDT Monday, September 14, 2026, maintains a Moderate Risk over portions of central and southwestern Iowa, coordinated with the Des Moines forecast office. HREF blended-mean QPF of 3–5 inches is cited near Des Moines and points south and southwest, with neighborhood probabilities of 60–80 percent for more than 3 inches and 3-hour flash-flood-guidance exceedance probabilities of 50–70 percent. A broad Slight Risk still covers much of the Midwest from the Door Peninsula through eastern Nebraska, plus a separate Slight Risk over the Southwest west of the I-25 corridor.

Hotspot 1 — Eastern Nebraska into western and central Iowa

This is the Slight Risk core. SPC places 5 percent tornado probabilities over parts of eastern Nebraska near Omaha, Lincoln, Council Bluffs, Bellevue, and Fremont, with 2 percent tornado probabilities extending toward Des Moines, Sioux City, Ames, West Des Moines, and Ankeny. Fifteen-percent wind and hail contours overlap the Omaha–Lincoln–Council Bluffs corridor. A 40–50 kt nocturnal low-level jet is forecast to increase effective storm-relative helicity this evening. SPC notes lingering low-level inhibition on RAP soundings and says it remains unclear whether convection will fully tap that shear. A sustained surface-based supercell in that environment would conditionally be capable of a strong tornado. Weak instability farther east in eastern Iowa should limit the severe risk deeper into the night.

Cities and counties to watch: Omaha, Lincoln, Bellevue, Fremont, and Council Bluffs; Sioux City, Fort Dodge, Ames, Des Moines, West Des Moines, and Ankeny; counties along and just ahead of the cold front from southeast Nebraska into west-central Iowa.

Restoration read: wind and hail first if supercells hold, then water if the same cells train on the WPC Moderate footprint. Stage tarps, generators, and extraction pumps before dark. Treat a tornado warning as a narrow local survey, not a regional event.

Hotspot 2 — Watch 668: western and northern Kansas, south-central Nebraska

The watch box runs roughly 45 miles north and south of a line from 145 miles southwest of Hill City, Kansas, to 50 miles east of Hastings, Nebraska. That is high-based, mixed-layer convection along the pre-frontal trough, not the same supercell corridor as Omaha. Primary threats are damaging wind, isolated 80 mph gusts, and hail to about 1.5 inches through 10:00 p.m. CDT.

Cities and counties to watch: Hill City, Hays, and northern Kansas counties in the watch outline; Hastings, Grand Island, and south-central Nebraska counties in and near the box. Confirm the county list on the Watch 668 outline update at SPC before you pre-position.

Restoration read: dry-microburst and outflow wind on roofs, siding, and center-pivot country. Photograph in remaining daylight only if it is safe. Hail claims will be isolated, not a swath unless a cell stays surface-based longer than expected.

Hotspot 3 — Central and southwestern Iowa flood Moderate, plus Southwest rain

The flood desk is Iowa. WPC introduced a small Moderate Risk for this Day 1 period because CAM guidance clustered 3–6 inch totals south of I-80, with urban streets and low-water crossings the first failures. A broader Slight Risk still covers eastern Nebraska through much of the Midwest. Expectation is scattered flash flooding tonight into early Tuesday morning.

The Southwest Slight Risk covers eastern Arizona, much of New Mexico west of I-25, and southwestern Colorado. PWATs are cited near the 95th–99th percentile. That is monsoon-style heavy rain on complex terrain and remnant burn scars, plus strong outflow, not the Plains watch.

Restoration read: Iowa is water and a 24–48 hour mold clock if 3-inch cores verify in town. The Southwest is localized washouts and urban flooding, not a CAT roster.

Just hit

SPC storm reports for the 12 UTC Monday, September 14, 2026 through 12 UTC Tuesday window showed no tornado, hail, or wind LSRs at the time of this afternoon desk. That is a quiet start to the convective day, not a forecast of a quiet evening. Last night’s 12 UTC Sunday–Monday window still holds the tickets already on the board: tree and wire work across Ohio, Pennsylvania, New York, and West Virginia from Sunday’s upper Ohio Valley–Northeast line; a roof peeled in Fox Township, Carroll County, Ohio; microburst-style trees and minor roof damage near Cloverport, Hardeman County, Tennessee; 1.00-inch hail near Sterling, Johnson County, Nebraska, and in Cascade and Judith Basin counties, Montana; a 61 mph gust near Patagonia, Arizona.

Sunday’s organized wind corridor is yesterday. Today’s new work, if it verifies, is Watch 668 and the eastern Nebraska–Iowa Slight Risk plus Iowa flash flooding.

Pulse table

Region	Main threats	SPC / NWS level	Status this afternoon
Eastern NE / western–central IA	Hail, damaging wind, conditional tornado	SPC Slight (2000 UTC)	Live Slight; initiation still uncertain
Western / northern KS, south-central NE	Damaging wind to 80 mph, hail to 1.5 in	Watch 668 to 10 p.m. CDT	Live watch
Central / southwestern Iowa	Flash flood, 3–6 in cores possible	WPC Moderate excessive rainfall	Tonight into Tuesday morning
Midwest Slight (Door Peninsula to eastern NE)	Scattered flash flood	WPC Slight	Overnight
E AZ / NM west of I-25 / SW CO	Heavy rain, outflow, burn-scar flood	WPC Slight	Afternoon–evening cells
Eastern North Carolina	Isolated gusty wind, small hail	Local / no categorical severe area	Isolated
Atlantic / Gulf vs. U.S. mainland	No landfalling tropical cyclone	NHC: no Atlantic TCs	Quiet on the mainland coast

What this means for restoration teams

Watch 668 wind at 65–80 mph is roof, siding, gutter, and tree-on-structure work in Kansas and south-central Nebraska. The Slight Risk east of that box is the same plus a conditional tornado and large hail if a supercell holds from Lincoln–Omaha into western Iowa. Iowa’s Moderate flood risk is wet drywall and a same-night extraction clock if the 3-inch HREF signal verifies south of I-80. Do not send one crew to both the watch box and Des Moines without checking which county has a warning now.

For teams in or near Watch 668: stage before sunset, not after the first warning. Property owners should photograph damage in daylight if it is safe, call the carrier, and start extraction the same night if water is inside.

What this is not

This is not a regional derecho and not a U.S. mainland hurricane landfall. National Hurricane Center products as of Monday afternoon, September 14, 2026, show no tropical cyclones in the Atlantic. Tropical Storm Norbert is in the east-central Pacific about 1,125 miles east of Hilo, Hawaii, with 40 mph winds and a weakening trend. Tropical Depression Fifteen-E is about 785 miles southwest of the southern tip of Baja California. Neither threatens U.S. mainland land. The work tonight, if it comes, will be scattered: a wind swath in the Kansas–Nebraska watch, a hail or tornado report in the eastern Nebraska Slight Risk, flooded intersections south of I-80 in Iowa.

Looking ahead

The SPC Day 2 Convective Outlook issued 12:14 p.m. CDT Monday, September 14, 2026 (valid 12 UTC Tuesday through 12 UTC Wednesday) is a Marginal Risk in a corridor from Kansas into western Ohio. Summary language: scattered strong thunderstorms may occur from the Great Lakes southwestward through the lower Missouri Valley Tuesday afternoon and evening, with at least isolated damaging wind gusts possible. Shear is forecast to be weak. Storms should be primarily short-lived, with a few clusters near the front. Watch the next Storm Tracker update rather than assuming Watch 668 is the last line of the week.

Sources and how to verify

Primary sources dated Monday, September 14, 2026: NOAA Storm Prediction Center 2000 UTC Day 1 Convective Outlook; Severe Thunderstorm Watch 668; SPC current watches and today’s LSR page (no reports in the 12 UTC Monday window at desk time); Weather Prediction Center Day 1 Excessive Rainfall Outlook updated 0733 UTC; National Hurricane Center Atlantic and East Pacific public pages. Morning desk on the same calendar day: Storm Updates: Eastern Nebraska–Iowa Slight Risk, Iowa Flood Moderate — Monday, September 14, 2026 (Morning).

Check weather.gov for the county warning, spc.noaa.gov for the outlook, watch, and LSRs, Watch 668, and WPC excessive rainfall for the flood overlay.

Informational only — not an official weather warning. Follow local authorities and the National Weather Service. Turn around, don’t drown.

September 14, 2026