Tag: South Dakota storms

Storm Updates: Southwest Flood Moderate, Dakotas Marginal — Monday, September 28, 2026

Monday afternoon desk. Water still owns the Southwest. A small Marginal is now on the northern Plains. Not an NWS warning.

This is a live Monday afternoon snapshot of U.S. local-storm activity as of Monday, September 28, 2026. The morning desk opened with a blank severe map. The Storm Prediction Center 2000 UTC Day 1 Convective Outlook, issued 0258 PM CDT, now carries a Marginal Risk of severe thunderstorms across parts of western and northern South Dakota and vicinity. No convective watches are valid. The last issued watch remains number 0674.

The Weather Prediction Center still holds a Moderate Risk of excessive rainfall over portions of the Southwest and Four Corners. The 16Z update expanded that Moderate southwest down the Colorado River to include the California–Arizona–Nevada tripoint. Restoration exposure this afternoon is water first on already wet Southwest ground, then isolated hail and gusty wind on the Dakotas Marginal, plus a short radar-indicated severe thunderstorm warning that fired over San Bernardino County, California. Conditions change fast. Verify with the National Weather Service for the specific county or ZIP before you roll.

What is live this afternoon

SPC summary language at 0258 PM CDT: isolated strong to severe thunderstorms may occur this afternoon and evening across parts of western and northern South Dakota and vicinity. The 20Z update notes stronger surface heating and less cloud cover near northwestern South Dakota, with temperatures into the low and mid 70s F downstream of developing convection near the Wyoming–South Dakota border. Storms were expected to form near the Black Hills around 20–22Z and spread east-northeast along a weak surface front. Stronger cells may produce isolated hail and gusty winds before becoming elevated across northern South Dakota and southern North Dakota later tonight.

Mesoscale Discussion 2330, issued 0240 PM CDT and valid through 2145 UTC, covers the western South Dakota vicinity. Concerning: severe potential, watch unlikely. Watch-issuance probability is 5 percent. SPC language: isolated strong to severe storms may produce sporadic hail through evening. Most probable peak hail size up to 1.25 inches. Most probable peak wind gust up to 60 mph. That is a local pulse, not a watch day.

WPC Day 1 excessive rainfall, updated 1537 UTC Monday and valid 16Z Monday through 12Z Tuesday, remains the national water headline. A Moderate Risk covers portions of the Southwest. The 16Z update expanded the Moderate to the CA/AZ/NV tripoint after coordination with NWS Las Vegas. Marginal and Slight areas were expanded north along the Nevada–Utah border. A separate Slight Risk remains over parts of North Dakota and northwestern Minnesota from training showers on the low-level jet. WPC notes much of the ongoing Arizona rain has been stratiform, but soils are already wet and the terrain is flashy.

National Hurricane Center as of the 2:00 PM MST Monday Polo advisory: Hurricane Polo is still a major hurricane near 25.0°N, 113.0°W, moving northeast at 12 mph, 115 mph maximum sustained winds, 963 mb. Life-threatening winds and flash flooding are beginning over portions of Baja California Sur. That is a Mexico land desk plus a U.S. flood-moisture feed. It is not a California or Arizona hurricane landfall. Hurricane Nolo remains a Central Pacific / Papahanaumokuakea desk. Tropical Storm Rachel is paralleling the southwest Mexico coast. Atlantic Tropical Depression Fay and Tropical Storm Hanna are not a CONUS land-threat desk this afternoon.

Hotspot 1 — Southwest and Four Corners flood Moderate

This is still today’s organized desk. Predecessor moisture from Polo and remnants of Odalys continues to lift north ahead of a mid-level shortwave moving from the California Valleys toward the lower Colorado River Valley. WPC guidance still supports a widespread 1 to 3 inches across the Four Corners region on soils already near saturation. South- and west-facing slopes along the Mogollon Rim and the San Juans remain favored. Burn scars, slot canyons, and rocky fans fail first.

Counties and terrain to watch this afternoon: Mogollon Rim and higher terrain in Arizona; western and southwestern New Mexico including burn-scar drainages near Lordsburg; the San Juan Mountains and adjacent southwest Colorado; southern Nevada valleys; and the newly expanded Moderate near the CA/AZ/NV tripoint and the lower Colorado River. WPC also flagged slow-moving lines along the Nevada–Utah border.

Restoration read: water first. Stage pumps, extractors, and sandbags on known flood ZIPs and burn-scar alluvial fans. Photograph crawlspaces and finished basements as soon as it is safe. Do not treat this as a wind event unless a local warning says otherwise.

Hotspot 2 — Western and northern South Dakota Marginal

This is the only categorical severe area on the current Day 1 map. SPC expects storms to form near the Black Hills and move east-northeast along a weak surface trough and front. MD 2330 keeps a watch off the table. Isolated quarter-to-golf-ball hail and 60 mph gusts are the staffed threats, not a derecho and not a tornado outbreak. Aberdeen and Rapid City county warning areas own the pulse. Northern South Dakota into southern North Dakota trends more elevated after dark.

Restoration read: isolated hail and tree work if a cell verifies. Do not pre-position a regional CAT team on a 5-percent watch probability.

Hotspot 3 — Lower Colorado / San Bernardino isolated SVR

SPC still withholds unconditional severe probabilities for southeast California, southern Nevada, and western Arizona, but NWS Las Vegas issued a Severe Thunderstorm Warning at 129 PM PDT Monday for San Bernardino County until 215 PM PDT. Radar-indicated hazards: 60 mph gusts and quarter-size hail near Amboy and Interstate 40 between mile markers 68 and 98, storm moving northeast at 20 mph. That warning is a short local pulse inside the WPC flood overlay, not an SPC watch.

Restoration read: check I-40 desert ZIPs and any hail-struck vehicles after the cell passes. The bigger ticket in that same corridor remains flash-flood water, not wind.

Just hit

SPC local storm reports for the current 1200 UTC Monday to 1159 UTC Tuesday window showed no tornado, hail, or wind reports as of this afternoon desk. That board resets at 12Z. Last night’s preliminary reports from the 27/1200–28/1159 UTC window remain the open tickets:

2216 UTC Sunday — 1.00-inch hail 20 miles south of Merriman, Cherry County, Nebraska. Vehicle damage reported. (NWS North Platte)
2330 UTC Sunday — 1.00-inch hail 2 miles north-northwest of Willow Park, Parker County, Texas. (NWS Fort Worth)
0032 UTC Monday — 1.00-inch hail 24 miles north of Whitman, Cherry County, Nebraska. (NWS North Platte)
1440 UTC Sunday — 66 mph gust 10 miles northwest of Okobojo Creek Recreation Area, Sully County, South Dakota. Mesonet. (NWS Aberdeen)
2300 UTC Sunday — 60 mph gust 22 miles west-southwest of Roosevelt, Sutton County, Texas. West Texas Mesonet Sonora 23SE. (NWS San Angelo)
2320 UTC Sunday — Unknown-speed wind 4 miles north-northwest of Willow Park, Parker County, Texas. Large tree limbs down on FM 730. (NWS Fort Worth)

No tornado reports were received in that window. Sunday evening Severe Thunderstorm Warnings over southwestern Cherry County, Nebraska, and northeastern Parker County, Texas, have expired. Today’s San Bernardino warning is a live local product, not yet an LSR.

Pulse table

Region	Main threats	SPC / NWS / WPC level	Status this afternoon
Southwest / Four Corners	Flash flood, training rain, burn-scar runoff	WPC Moderate excessive rainfall	Live through Tuesday 12Z; outline expanded to CA/AZ/NV tripoint
Western / northern South Dakota	Isolated hail, gusty wind	SPC Marginal; MD 2330 watch unlikely	This afternoon into evening
Eastern Dakotas / NW Minnesota	Training showers, localized flood	WPC Slight excessive rainfall	Ongoing
SE CA / southern NV / western AZ	Numerous storms, isolated wet downburst or SVR	General thunder; local SVR San Bernardino	Today into evening
Cherry County, NE / Parker County, TX	Quarter hail, tree limbs	Expired SVR / Sunday LSRs	Just-hit cleanup
Polo	Baja wind and flood; U.S. moisture feed	NHC major hurricane near Baja Sur	Not a CONUS landfall

What this means for restoration teams

The national severe map is no longer blank, but it is still a small Marginal. The work that actually fills trucks today is WPC Moderate water on the Southwest and Four Corners. Saturated soils plus burn-scar fans do not need a supercell. Stage extraction before the next training core, not after the first flash-flood warning.

South Dakota is isolated hail and outflow if the Black Hills cells organize. MD 2330 says watch unlikely. Staff it as a local pulse. Cherry County and Willow Park remain yesterday’s hail and limb tickets. Photograph vehicles and roofs in daylight if it is still safe.

Polo is a Baja and Sonora hurricane desk plus a U.S. flood-moisture feed. Do not staff it as a California or Arizona landfalling hurricane. Nolo is a Central Pacific desk.

What this is not

This is not a Slight or Enhanced severe day, not a derecho, and not a U.S. mainland hurricane landfall. Work today, if it verifies, is flash flooding on the Four Corners Moderate, a narrow Dakotas Marginal, and one desert SVR in San Bernardino County. That is the local-storm pattern this desk should staff.

Looking ahead

SPC Day 2, issued 1215 PM CDT Monday and valid 12Z Tuesday through 12Z Wednesday, is a Marginal Risk from southern and eastern New Mexico into west Texas. Isolated severe gusts and a couple of tornadoes are possible Tuesday afternoon through early Wednesday as Polo remnants eject toward far west Texas and southeast New Mexico. Day 3 is already a Slight. WPC keeps Moderate flood language into Tuesday over parts of the Southwest, central and southern Rockies, and southern High Plains. Watch Tuesday morning Storm Tracker rather than assuming today’s small map is the week.

Sources and how to verify

Primary sources: NOAA Storm Prediction Center Sep 28, 2026 2000 UTC Day 1 Convective Outlook; SPC Mesoscale Discussion 2330; SPC Current Watches page (no watches valid as of 1414 UTC Monday); SPC local storm reports for 28/1200 UTC–present and 27/1200–28/1159 UTC; Weather Prediction Center Day 1 Excessive Rainfall Outlook updated 1537 UTC Mon Sep 28; National Hurricane Center Hurricane Polo Advisory 33 at 2:00 PM MST Mon Sep 28; NWS Las Vegas Severe Thunderstorm Warning for San Bernardino County issued 129 PM PDT; National Weather Service warning text compiled at weather.gov.

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. Morning desk for this calendar day: Storm Updates: Southwest Flood Moderate, Quiet Severe Pulse — Monday, September 28, 2026 (Morning).

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

September 28, 2026

Storm Updates: Quiet Pulse, Northeast Flood Slight — Sunday, September 27, 2026

This is a live Sunday afternoon snapshot of U.S. local-storm activity as of Sunday, September 27, 2026. The organized severe desk is quiet. The Storm Prediction Center 2000 UTC Day 1 Convective Outlook states no severe thunderstorm areas are forecast and organized severe storms are not expected through early Monday. No convective watches are valid. Restoration exposure this afternoon is leftover nor’easter wind and water on the coastal Northeast, isolated gusty outflow from north Texas cells, and urban ponding where WPC keeps a Slight excessive-rainfall risk from New Jersey through southern New England.

These are county-scale thunderstorms and a fading coastal cyclone, not a mainland hurricane landfall. Conditions change. 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 (2:57 p.m. CDT) Day 1 outlook with the categorical line removed. The morning Marginal over western Nebraska and the Black Hills was taken off earlier; this cycle made no further change. Isolated convection was ongoing across portions of central and north Texas near 1945 UTC. SPC notes an isolated strong or damaging gust cannot be ruled out given steep low-level lapse rates and moderate buoyancy, but weak lower-tropospheric flow, limited effective shear, and poor mid-level lapse rates keep the severe probability under 5 percent.

A few additional thunderstorms remain possible late this afternoon and evening along a diffuse surface boundary from north Texas into southern Oklahoma. An occluded cyclone continues to weaken near the northern Mid-Atlantic coast, with elevated convection and isolated lightning possible to its northeast across southeast New England. Elevated storms over central South Dakota this morning were described as already past peak.

Weather Prediction Center Day 1 Excessive Rainfall Outlook (valid 12 UTC Sunday through 12 UTC Monday) holds a Slight Risk of excessive rainfall for parts of the coastal Northeast — New Jersey, southern New York, and southern to central New England. Additional rainfall of 1 to 3 inches, locally heavier, is the language over the NYC metro into eastern Massachusetts. A Marginal Risk covers parts of Upstate New York and central New England, plus a separate Marginal from the Texas Hill Country into south-central Oklahoma. Isolated low-end flood potential is noted over portions of northern Arizona as moisture associated with Hurricane Polo begins to lift north of the Mexican coast.

High Wind Warnings that covered Eastern Monmouth and Coastal Ocean Counties in New Jersey and Long Island and adjacent Connecticut zones were in effect until noon EDT Sunday. Those products have expired. Tree-and-wire work from the overnight gusts is a just-hit desk, not a live warning desk.

Hotspot 1 — Coastal Northeast flood slight, wind fade

The live organized threat here is water, not a new severe watch. The slow-moving nor’easter lingering near northern New Jersey and eastern Long Island is still funneling moisture across southern New England. Instability is low, so instantaneous rates are not the main story. Saturated soils from coastal inundation and prior heavy rain keep urban streets, poor drainage, and small streams in play.

Cities and counties to watch: New York City and Long Island; Eastern Monmouth and Coastal Ocean Counties, New Jersey; New London and Middlesex Counties, Connecticut; eastern Massachusetts including the Boston metro. Restoration read: extraction and drying from last night’s wind-driven rain, plus ponding calls if the Slight Risk verifies. Photograph roofs in remaining daylight only if it is safe. Do not treat this as a new High Wind Warning — those expired at noon EDT.

Hotspot 2 — North Texas into southern Oklahoma scatter

This is the only convective corridor SPC is still talking about on the afternoon update. Isolated cells were already up over central and north Texas mid-afternoon. The same diffuse boundary can support a few more storms into southern Oklahoma this evening. Gusty outflow is the listed hazard. Hail and tornado probabilities are not highlighted.

Cities and counties to watch: the Dallas–Fort Worth periphery, Waco and Temple corridors, Wichita Falls, and counties along the Red River into southern Oklahoma. WPC’s Marginal excessive-rainfall pocket from the Texas Hill Country into south-central Oklahoma is the flood overlay on the same air mass. Restoration read: isolated wind and brief heavy rain. Staff local Severe Thunderstorm Warnings if they fire; do not staff a regional outbreak that SPC has already declined to draw.

Hotspot 3 — High Plains leftover and northern Arizona moisture

The morning Marginal for large hail over western Nebraska and the Black Hills is gone. SPC says the central South Dakota convection has already peaked and that any overnight elevated storms from western South Dakota into North Dakota carry only a low isolated-hail threat. NWS Aberdeen did issue a Severe Thunderstorm Warning this morning for parts of Stanley, Sully, and Dewey Counties, South Dakota — 60 mph gusts and quarter-size hail, radar indicated, until 10:00 a.m. CDT. That product is expired.

Northern Arizona is a low-end flood mention only, as flow turns southwest ahead of a trough digging into California and begins to draw moisture associated with Hurricane Polo. Polo itself is a Baja California Sur hurricane, not a U.S. mainland landfall. Restoration read: check whether any local flash-flood warning is actually live before rolling a crew. The outlook language is not a warning.

Just hit

SPC today’s storm-report page for the 1200 UTC Sunday through 1159 UTC Monday window showed no tornado, hail, or wind LSRs as of this afternoon scan. The morning desk already logged overnight Comanche County, Oklahoma wind and quarter hail from Saturday night. Mid-Atlantic High Wind Warnings that ran through noon EDT Sunday are the other just-hit pile: trees, service drops, and coastal water intrusion on the Jersey Shore, Long Island, and southern New England.

That is ticket work already on the books, not a new watch. Hurricane Nolo remains south of the Hawaiian Islands and is not a CONUS landfall. Hurricane Polo is a Mexico / Baja desk. Tropical Depression Fay is well west-southwest of the Azores. None of those systems is a U.S. mainland hurricane landfall this afternoon.

Pulse table

Region	Main threats	SPC / NWS level	Status this afternoon
Coastal Northeast (NJ / NYC / southern New England)	Urban flood, leftover wind damage	WPC Slight excessive rainfall; High Wind Warnings expired noon EDT	Live flood slight / wind fade
North Texas / southern Oklahoma	Isolated gusty outflow, brief heavy rain	SPC no severe area; WPC Marginal flood (Hill Country–south-central OK)	Scattered cells
Western NE / Black Hills / central SD	Isolated hail earlier; now quiet	Morning MRGL removed; SVR warning expired 10 a.m. CDT	Quiet
Northern Arizona	Isolated heavy rain	WPC low-end mention	Quiet / watch local products
CONUS Atlantic / Gulf coast	No landfalling hurricane	NHC systems offshore (Fay, Polo, Nolo)	Quiet on the mainland

What this means for restoration teams

Sunday afternoon is a close-out and water day, not a chase day. Northeast shops should finish tree-and-roof tickets from the expired High Wind Warnings and stay ready for urban water calls if the Slight Risk trains on already-wet ground. North Texas and southern Oklahoma shops watch local warnings only. High Plains shops can stand down the morning hail Marginal.

Wind that already happened is siding, gutter, and tree-on-structure work. New water on a Slight Risk is wet drywall and a 24–48 hour mold clock. Photograph 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. SPC has no severe thunderstorm area and no watch. Polo is Baja. Nolo is south of Hawaii. Fay is mid-Atlantic open water. Do not invent a named-CAT desk on the CONUS from those tracks.

Looking ahead

SPC Day 2 (Monday) also has no severe thunderstorm areas forecast. Severe thunderstorm probability remains low. WPC discussion language for Monday raises a Moderate excessive-rainfall risk over parts of the Southwest, Great Basin, and central and southern Rockies as Polo moisture is drawn inland — that is tomorrow’s flood overlay, not today’s. Watch the next Storm Tracker update rather than assuming Sunday’s quiet line holds after 12 UTC Monday.

Sources and how to verify

Primary sources: NOAA Storm Prediction Center Sep 27, 2026 2000 UTC Day 1 Convective Outlook (Chalmers/Guyer); SPC current watches page updated 1705 UTC Sunday (no watches valid); SPC today’s storm reports (20260927 1200–1159 UTC window); Weather Prediction Center Day 1 Excessive Rainfall Outlook updated 0812 UTC Sunday; NWS warning text including expired High Wind Warnings (Mount Holly and Upton) and the expired Aberdeen Severe Thunderstorm Warning; National Hurricane Center public products for Polo, Nolo, and Fay. Morning desk for this calendar day: Storm Updates: High Plains Hail Marginal, Nor’easter Wind Fade — Sunday, September 27, 2026 (Morning).

Check weather.gov for the county warning, spc.noaa.gov for the outlook, watch, 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 27, 2026

Storm Updates: High Plains Hail Marginal, Nor’easter Wind Fade — Sunday, September 27, 2026 (Morning)

This is a live Sunday morning snapshot of U.S. local-storm activity as of Sunday, September 27, 2026. Overnight into this morning, the organized severe desk stayed quiet. No Storm Prediction Center tornado or severe thunderstorm watches are valid. The last issued convective watch remains Watch 674, already expired. The 1300 UTC Day 1 Convective Outlook, issued 0730 AM CDT and valid 271300Z–281200Z, holds a Marginal Risk of severe thunderstorms for portions of the central and northern High Plains. Summary language from Norman: isolated thunderstorms capable of large hail will be possible across portions of western Nebraska and the Black Hills of South Dakota. No tornado or damaging-wind probability areas are forecast. Restoration exposure this morning is leftover Mid-Atlantic and southern New England wind from the fading nor’easter, isolated High Plains hail later today, and a Weather Prediction Center Slight excessive-rainfall overlay on parts of southern New England.

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

What is live this morning

No convective watches are current. The SPC watch page states no watches are valid. Today’s storm-report window that opened at 1200 UTC Sunday shows no tornado, hail, or wind reports yet. The overnight board from the Saturday convective day is thin and local: quarter-size hail near Lake Lawtonka in Comanche County, Oklahoma, at 0033 UTC, plus trees down about seven miles west of Central High and roadway damage about six miles north of Hulen in the same county just before 0000 UTC. That is yesterday’s western Oklahoma Marginal verifying as isolated cells, not a watch overlay that carried into Sunday.

The 1300 UTC Day 1 outlook draws a 5 percent hail contour over about 48,893 square miles and roughly 328,899 people. Larger centers inside the contour include Rapid City, Spearfish, Rapid Valley, and Sturgis in South Dakota, and Scottsbluff, Nebraska. A residual moist axis with 60s F surface dewpoints still reaches from the southern Plains into Nebraska and South Dakota. Forcing stays weak through the day, which should keep coverage isolated. Evening coverage may increase as a subtle vorticity maximum and a modest low-level jet arrive. Large hail is the named hazard with the strongest storms. SPC also notes scattered thunderstorms over north and central Texas late this afternoon and isolated to widely scattered storms from northern Utah into central Wyoming, with localized gusty winds possible but not enough confidence for a low-probability severe highlight.

The Weather Prediction Center short-range discussion issued 422 AM EDT Sunday keeps a Slight Risk of excessive rainfall over parts of southern New England on Sunday into Monday morning. The same discussion holds a Moderate Risk for Monday over parts of the Southwest, Great Basin, and central and southern Rockies — that is tomorrow’s water desk, not this morning’s. A strong nor’easter still drifts near the New Jersey coastline. WPC language: widespread minor to moderate coastal flooding is expected for at least one more high-tide cycle Sunday morning after significant coastal flooding Saturday. Wind gusts of 40 to 50 mph remain possible Sunday morning from New Jersey to Long Island. NWS wind advisories were still live into noon EDT for New York City, Long Island, coastal and southeast Connecticut, the Hudson Valley, and the Berkshires. Gale Warnings remain on New England coastal waters. Dense fog was also in play early this morning over parts of south-central Nebraska and north-central Kansas until 11 AM CDT. A Flood Advisory covers pieces of Bourbon and Crawford Counties in southeastern Kansas into early afternoon.

Hotspot 1 — Western Nebraska and the Black Hills

This is the only categorical severe area on the Sunday Day 1 map. Isolated storms capable of large hail are the forecast, not a wind outbreak and not a tornado corridor. Heating on the western edge of the moist plume can build moderate buoyancy over western Nebraska even with some high cloud. Storm coverage stays limited until evening lift arrives.

Cities and counties to watch: Rapid City, Spearfish, Sturgis, and the Black Hills foothills in South Dakota; Scottsbluff and the Nebraska Panhandle. Restoration read: isolated hail dents and a few broken windows if a cell organizes, not a regional wind swath. Staff lightning and a tarp kit. Do not pre-position as if a Slight is coming.

Hotspot 2 — Mid-Atlantic and southern New England nor’easter fade

The live work here is leftover high wind, trees, wires, tidal water, and one more high-tide cycle — not an SPC convective watch. Saturday’s High Wind Warnings have largely rolled off into Wind Advisories and marine Gale Warnings. WPC is explicit that coastal and tidal flooding matter more than rainfall totals on the cold side of the low. Southern New England still sits under a Slight excessive-rainfall risk for localized urban and poor-drainage flooding as the rain slowly wanes.

Restoration read: this is the just-hit pile from Saturday night into Sunday morning. Check trees on service drops, wet basements, and coastal roads at high tide. Do not treat it as a new severe-thunderstorm outbreak. This is not a U.S. mainland hurricane landfall. Tropical Depression Fay is well west-southwest of the Azores. Hurricane Polo is a Baja California Sur forecast. Hurricane Nolo remains a Hawaii desk.

Hotspot 3 — North and central Texas, Utah–Wyoming scatter

SPC leaves these areas outside the Marginal contour. Scattered storms over north and central Texas late afternoon, plus isolated to widely scattered storms from northern Utah into central Wyoming, can still throw localized gusty winds. Coverage and magnitude were not enough for a 5 percent wind highlight on the 1300 UTC update. Treat local Severe Thunderstorm Warnings if they fire. Do not invent a watch.

Just hit

Sunday’s 1200 UTC storm-report window is empty as of this morning desk: no tornado, hail, or wind LSRs yet today. Overnight into early Sunday, the Saturday report day closed with isolated Comanche County, Oklahoma work — quarter hail northeast of Lake Lawtonka and trees plus roadway damage west of Central High and north of Hulen. That is the just-hit convective ticket. The larger just-hit desk is coastal wind and tidal water from New Jersey through southern New England after Saturday’s nor’easter blow.

Pulse table

Region	Main threats	SPC / NWS / WPC level	Status this morning
Western NE / Black Hills SD	Isolated large hail	SPC 1300 UTC Marginal	Afternoon into evening
NJ / NYC / Long Island / southern New England	Residual wind, tidal flood, urban rain	Wind advisories; WPC Slight rain	Fading through Sunday
Comanche County, OK	Trees, quarter hail	Saturday LSRs	Just hit overnight
North / central TX; northern UT–central WY	Localized gusty wind	General thunderstorms	Late day scatter
CONUS severe watches	None	No watches; last was 674	Quiet
SPC LSRs today (from 12Z Sun)	None yet	0 tornado / 0 hail / 0 wind	Quiet

What this means for restoration teams

Sunday morning is a quiet-pulse-plus-leftover desk. The convective piece is a small High Plains hail Marginal with no watch and an empty Sunday LSR board. Treat that as isolated cells later today, not a regional event. The live volume is already on the ground along the Mid-Atlantic and southern New England coast: trees, wires, and wet interiors from Saturday into this morning’s last high tide. 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.

What this is not

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

Looking ahead

SPC Day 2 and Day 3 convective outlooks carry no severe thunderstorm areas. WPC lifts a Moderate excessive-rainfall risk Monday over parts of the Southwest, Great Basin, and central and southern Rockies, with a Slight over parts of the Upper Midwest Monday. Watch the afternoon Storm Tracker rather than assuming the High Plains Marginal is the last line of the week.

Sources and how to verify

Primary sources: NOAA Storm Prediction Center 1300 UTC Day 1 Convective Outlook for Sunday, September 27, 2026 (issued 0730 AM CDT); SPC current watch page (no watches valid; last issued Watch 674); SPC storm reports for 1200 UTC September 26 through 1159 UTC September 27 and the new Sunday window from 1200 UTC September 27; Weather Prediction Center Short Range Forecast Discussion issued 422 AM EDT Sunday; National Weather Service wind-advisory, gale-warning, dense-fog, and flood-advisory text; National Hurricane Center Tropical Weather Outlook (Fay well west-southwest of the Azores; no U.S. mainland tropical cyclone landfall).

Check weather.gov for the county warning, spc.noaa.gov for the outlook, watch, and LSRs, and WPC excessive rainfall for the flood overlay. Prior desk: Saturday afternoon, 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 27, 2026

Storm Updates: New Mexico Flood Moderate, Western Dakotas Marginal — Wednesday, September 23, 2026

This is a live Wednesday afternoon snapshot of U.S. local-storm activity as of Wednesday, September 23, 2026. The organized desk is still water, not wind. The Weather Prediction Center Day 1 Excessive Rainfall Outlook holds a Moderate Risk across portions of central and eastern New Mexico. The Storm Prediction Center 2000 UTC Day 1 Convective Outlook (issued 2:58 p.m. CDT; Halbert/Lyons; valid 232000Z–241200Z) trims the severe overlay to a Marginal Risk across parts of the western Dakotas only. The southern Appalachians Marginal from the morning 1300 UTC package is off the 2000 UTC map. No convective watches are currently valid. No mesoscale discussions are in effect.

These are county- and ZIP-scale flood and isolated hail/wind pulses, not a U.S. mainland hurricane landfall. Restoration exposure this afternoon into tonight is water first in New Mexico and far west Texas (training storms, burn-scar runoff, arroyos), leftover wet soils from Ohio through the southern Appalachians, and isolated damaging gusts or marginally severe to locally 2-inch hail if the western Dakotas cells organize. Separately, Tropical Storm Nolo now carries a Hurricane Watch for Hawaii County — not a CONUS landfall, and not the Restoration Intel CAT desk. 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 2000 UTC update says the western Dakotas forecast remains largely on track. Isolated damaging wind gusts and severe hail are possible late this afternoon where moisture pooling has put upper-50s to low-60s °F dewpoints under clearing skies. Moderate deep-layer shear and modest buoyancy (500–1,000 J/kg MLCAPE; 30–40 kt 0–6 km shear) can support organized storms and transient supercells. A CIG 1 contour was added for isolated 2-inch hail with any stronger supercell. Population centers named in the Marginal contour: Dickinson, North Dakota; Belle Fourche, South Dakota; Sidney, Montana. Tornado probabilities remain zero. No watches as of the SPC watches page update at 21:00:23 UTC Wednesday, September 23, 2026. Most recent watch on the board: 0674.

Southern Appalachians: the 2000 UTC outlook removed the 5% wind probabilities. Widespread low stratus, modest buoyancy, and a mostly cluster/multicell mode keep the severe potential low even as lightning continues in eastern Tennessee along the inverted trough.

WPC Day 1 Excessive Rainfall Outlook (updated 0832 UTC Wednesday, September 23, 2026; Chenard; valid 12Z Wed–12Z Thu) still owns the national headline: Moderate Risk across portions of central and eastern New Mexico. Scattered to numerous flash floods expected; locally significant and life-threatening impacts remain possible on sensitive terrain, urban drainage, and burn scars. Widespread 1–2 inches generally expected, localized 2–4 inch swaths on top of pre-12Z rain. HREF/REFS neighborhood probabilities of more than 3 inches run 40–70% on the eastern half of the Moderate area. Slight Risk into southeast Arizona and a slice of far west Texas. Separate flood desks: Slight over portions of eastern Kentucky, eastern Tennessee, and far western North Carolina; Marginal from Ohio into West Virginia and western Virginia/North Carolina; Marginal over south Florida.

Live NWS flood products this morning into midday included a flash-flood warning from NWS Albuquerque for the South Fork burn scar in south-central Lincoln County (issued 9:08 a.m. MDT, through 12:15 p.m. MDT; 0.5–1.25 inches already down; Brady, Bear, Perk, Cedar Creek, Eagle Creek, and Rio Ruidoso drainages). Flood watches remain in effect through this evening / late tonight across much of central and eastern New Mexico and south-central New Mexico including the Tularosa Basin / Alamogordo / Doña Ana corridor (NWS Albuquerque and NWS El Paso/Santa Teresa).

Hotspot 1 — Central and eastern New Mexico / far west Texas

Still the organized desk. Mid-level shortwave lifting north-northeast across New Mexico, robust upper divergence, easterly upslope, and training cells in deep southerly flow. Cloud cover is the limiter; the eastern edge of the rain shield is where heating and CAPE can still fire the heavier cores. Burn scars and arroyos fail first. The South Fork burn scar warning this morning is the restoration ticket type: debris flow of rock, mud, and vegetation into reservoirs, bridges, culverts, and the Rio Ruidoso downstream of Ruidoso Downs.

Restoration read: water first. Stage pumps and air movers before the next training band. Start extraction the same night if water is inside. Do not drive flooded arroyos. Turn around, don’t drown.

Hotspot 2 — Western Dakotas / Black Hills

The only remaining SPC Marginal as of 2000 UTC. Lee trough and moisture plume from the High Plains; widely scattered storms near the Black Hills and the Dickinson–Belle Fourche–Sidney corridor late afternoon into early evening. Isolated damaging gusts and severe hail, with a conditional isolated 2-inch hail note if a transient supercell holds together. No tornado contour. No watch.

Restoration read: isolated wind and hail, not a regional outbreak. Stage only if you already work western North Dakota, western South Dakota, or far eastern Montana. Do not pull crews off the New Mexico water desk for this.

Hotspot 3 — Eastern Tennessee / southern Appalachians flood leftover + Tropical Storm Nolo (Hawaii County)

SPC took the Marginal off this corridor at 2000 UTC. The flood overlay is still live: WPC Slight over eastern Kentucky, eastern Tennessee, and far western North Carolina; WPC Marginal from Ohio into West Virginia and western Virginia/North Carolina. Wet soils from the last several days keep flash-flood guidance low even with reduced precipitable water. Lightning and modest CAPE along the inverted trough can still produce locally heavy cells. That is a water job, not a tarp outbreak.

Separately, Central Pacific Hurricane Center / NHC Advisory 13 at 11:00 a.m. HST Wednesday, September 23, 2026: Tropical Storm Nolo, 14.5°N 155.3°W, about 310 miles south of South Point, Hawaii, 40 mph sustained, moving west-northwest at 6 mph. A Hurricane Watch is in effect for Hawaii County. Forecast: approach the Big Island Friday and Saturday; possible hurricane Thursday and possible major hurricane by the weekend. Rainfall: 15–20 inches on the Big Island with maxima near 35 inches; 5–10 inches on Maui with maxima near 20 inches. Storm surge 1–3 feet possible in Hawaii County. This is a Hawaii land threat on Friday–Saturday, not a CONUS landfall today. Polo and Odalys remain eastern Pacific systems off Mexico / well west of Baja.

Restoration read: Appalachians = leftover plus second-chance street and creek water. Hawaii County = watch the NHC package Friday; do not invent a mainland hurricane from Nolo.

Just hit

SPC local storm reports for the current 23/1200 UTC–24/1159 UTC window, as of this afternoon check: no tornado, no hail, no wind reports received yet. Do not invent LSR points for today.

The prior 22/1200 UTC–23/1159 UTC window still holds the last 24-hour ticket pile: quarter-size hail near Sterlington, Louisiana; Suncrest, Utah; and south of Colorado Springs. Wind damage across Lauderdale, Cherokee, DeKalb, St. Clair, and Shelby counties in Alabama (trees, lines, a pole on a vehicle, roof and tree damage in Montevallo). Odessa, Texas, lines and outbuilding/carport damage. Measured 59 mph near Rawlins, Wyoming. Measured 68 and 74 mph southwest of Sundown in Cochran County, Texas. Overnight into this morning the flood desk already logged El Paso County, central Virginia (Amelia / Powhatan), and a receding western North Carolina pulse around Lake Lure / Bat Cave, plus today’s South Fork burn-scar warning in Lincoln County, New Mexico.

Pulse table

Region	Main threats	SPC / WPC / NWS level	Status this afternoon
Central / eastern NM and far west TX	Flash flood, training storms, burn-scar runoff	WPC Moderate + NWS flood watches / FFW	Live flood desk through Thu 12Z
Western Dakotas / Black Hills	Isolated hail / damaging gusts; conditional 2″ hail	SPC Marginal	Late afternoon–early evening
Southeast AZ	Localized flash flood	WPC Slight	Today
Eastern KY / eastern TN / far western NC	Flash flood on wet soils	WPC Slight; SPC Marginal removed at 2000Z	Afternoon–evening water
OH into WV / western VA–NC	Localized flash flood	WPC Marginal	Today
South Florida	Urban flash flood	WPC Marginal	Local
Hawaii County	TS Nolo; hurricane conditions possible late Friday	NHC Hurricane Watch	Watch now; land threat Fri–Sat
U.S. mainland tropics	No CONUS landfalling named cyclone	NHC	Quiet for CONUS land

What this means for restoration teams

New Mexico remains the water job if the Moderate risk verifies — extraction, drying, and a 24–48 hour mold clock, plus debris-flow cleanup on burn scars. Far west Texas is the eastward leak of the same plume. The Dakotas Marginal is isolated hail and wind for shops that already cover Dickinson, the Black Hills, and Sidney. The Appalachians are leftover water, not a new severe overlay. Hawaii County is a Friday–Saturday NHC problem, not today’s CONUS roll. Stage the New Mexico pumps now. 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. There is no Slight or Enhanced convective risk on the 2000 UTC Day 1 map. There are no valid convective watches. Do not write Nolo as a Gulf or Atlantic landfall; it is a Central Pacific storm with a Hurricane Watch for Hawaii County and a forecast approach to the Big Island on Friday and Saturday. Hurricane Polo (eastern Pacific, off southwest Mexico) and Hurricane Odalys (well west of Baja) are not CONUS land threats today. Today’s CONUS work, if it verifies, is New Mexico flash flood plus isolated western Dakotas hail/wind.

Looking ahead

SPC Day 2 Convective Outlook for Thursday (issued 12:44 a.m. CDT Wednesday, September 23, 2026; Squitieri; valid 241200Z–251200Z) shows no severe thunderstorm areas. Showers and scattered storms can still run from the Interior West into the central Plains behind the same Southwest impulse, but shear and buoyancy do not overlap enough for probabilities. That does not cancel tonight’s New Mexico flood problem or this afternoon’s Dakotas Marginal. Watch the next Storm Tracker update rather than assuming the Moderate rainfall risk is the last line of the week. Nolo’s Hawaii County watch is the tropical item to re-check Thursday afternoon.

Sources and how to verify

Primary sources dated Wednesday, September 23, 2026: SPC 2000 UTC Day 1 Convective Outlook (Halbert/Lyons, 2:58 p.m. CDT); SPC 1630 UTC discussion (Smith/Mead); SPC watches page updated 21:00:23 UTC (no watches; last issued 0674); SPC mesoscale discussions page (none in effect); SPC today’s LSRs (none received after 1200 UTC) and 22/1200Z–23/1159Z LSRs; WPC Day 1 Excessive Rainfall Outlook updated 0832 UTC (Chenard); NWS Albuquerque South Fork burn-scar flash-flood warning 9:08 a.m. MDT; NWS Albuquerque and El Paso/Santa Teresa flood watches; NHC/CPHC Tropical Storm Nolo Advisory 13, 11:00 a.m. HST; SPC Day 2 outlook (Squitieri).

Check weather.gov for the county warning, spc.noaa.gov for the outlook, watch, and local storm reports, WPC excessive rainfall for the flood overlay, and nhc.noaa.gov for Nolo. Morning desk on the same calendar day: Storm Updates September 23, 2026 (Morning) — New Mexico Flood Moderate, Dakotas–Appalachians Marginal.

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

September 23, 2026

Storm Updates: Idaho–Utah Marginal, Dakotas Flood Slight — Thursday, September 17, 2026

This is a live Thursday afternoon snapshot of U.S. local-storm activity as of Thursday, September 17, 2026. The Storm Prediction Center 2000 UTC Day 1 Convective Outlook holds a Marginal Risk of isolated severe wind gusts and hail this afternoon and evening over parts of Idaho and Utah and a small part of the central High Plains. No convective watches are valid. Mesoscale Discussion 2304 covers southern and central Idaho with a 20 percent chance of a watch. The Weather Prediction Center Day 1 Excessive Rainfall Outlook remains the organized ticket: Slight Risk over portions of the north-central Plains and Midwest and over the southwestern U.S. 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 isolated hail and wind if cells verify over the Snake River Plain and Wasatch Front, plus water from the Wyoming Front Range across South Dakota into southwest Minnesota and leftover Southwest terrain. 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 0247 PM CDT, valid 172000Z–181200Z. Forecasters Chalmers and Weinman made no changes from the midday package. Headline: thunderstorms with isolated severe wind gusts and hail will be possible over parts of the Intermountain West this afternoon and evening. A few strong to severe gusts may also occur across portions of the central High Plains. Risk-area population centers listed by SPC include Salt Lake City, West Valley City, Provo, West Jordan, and Orem. Categorical risk is Marginal only. No Slight Risk. No tornado probabilities in the 2000 UTC package. The Ohio Valley Marginal from Wednesday remains off the map.

Current convective watches: none. SPC watch page last updated 2059 UTC Thursday: no watches currently valid. Most recently issued watch remains Severe Thunderstorm Watch 669, already expired. Do not treat 669 as a live product.

MCD 2304, issued 0246 PM CDT and valid 1946Z–2215Z, covers parts of southern and central Idaho. Concerning: severe potential, watch unlikely. Probability of watch issuance: 20 percent. Summary: the risk of a few severe storms capable of producing large hail and severe wind gusts will increase through the remainder of the afternoon. Most probable peak wind gust 55–70 mph. Most probable peak hail size 1.00–1.75 inches. Offices tagged: Pocatello, Missoula, Boise. By late afternoon the live MD list showed no mesoscale discussions currently in effect; treat 2304 as the latest issued discussion, not a standing watch.

WPC Day 1 excessive-rainfall language valid 12Z Thursday through 12Z Friday still has two Slight Risk corridors. One is a high-end Slight across much of South Dakota, expanding toward Sioux Falls and into southwestern Minnesota and northwest Iowa, and west-southwest to the Cheyenne, Wyoming region east of the Laramie Range. The other holds Slight Risk over New Mexico and eastern Arizona into the San Juans and western Colorado, with Marginal coverage into the Salt Lake corridor and southeastern Idaho. Wednesday’s Moderate Risk over southern and central Arizona is aftermath, not a live upgrade.

Hotspot 1 — Southern and central Idaho into northern Utah

Morning water vapor showed an upper low over northern California with a band of strong flow aloft and embedded shortwave troughs across Nevada into Utah and Idaho. Strong heating was expected to aid scattered thunderstorms from southern Idaho into northern Utah by mid-afternoon. Sufficient vertical shear is present for rotating updrafts capable of large hail and gusty or damaging winds. Coverage is limited. SPC still expects one or two severe cells later today, mainly over the eastern Snake River Plain. The 18Z Boise sounding in MCD 2304 sampled steep deep-layer lapse rates and an elongating, mostly straight hodograph with about 30–40 kt of cloud-layer shear. Cells first. Small clusters later if outflow organizes.

Overnight LSRs already put quarter-size hail at Huntington in Emery County and at East Carbon and Sunnyside in Carbon County. That is the same Salt Lake City forecast office that owns this afternoon’s Utah cells.

Restoration read: hail first if discrete cells fire over the Snake River Plain, Boise, Pocatello, or the Wasatch Front. Wind second if storms cluster. Stage roof and auto-glass survey capacity before the first warning, not after. Flash-flood risk on this corridor is Marginal to isolated, not the organized Dakotas ticket.

Hotspot 2 — Dakotas water corridor and the High Plains wind overlay

Remnants of a weak tropical low tracked northeast across the Four Corners this morning. Ample moisture and weak ascent support considerable clouds and scattered thunderstorms over the Colorado mountains and southern Wyoming, spreading east into eastern Colorado and western Nebraska and Kansas. High-based convection poses a risk of locally damaging wind gusts. Daytime heating is the limiter because of lingering cloud cover. That is the SPC Marginal overlay: isolated gusts, not a Slight Risk wind event.

WPC is more organized here than SPC. A tropical-origin shortwave ejecting out of Arizona pivots through the central Rockies and into the northern Plains tonight. Precipitable-water anomalies approach the 95th–99th percentile from South Dakota into southern Minnesota by the end of the period. Discussion language includes 2–4 inches, locally higher, with HREF neighborhood probabilities of greater than 2 inches at 50–80 percent across a large High Plains swath. The centroid of greater-than-3-inch probabilities sits just east and southeast of Rapid City into Badlands National Park. The Slight Risk was expanded east toward Sioux Falls for the last 6–8 hours of the forecast.

Restoration read: water first from the Wyoming Front Range across western and central South Dakota into southwest Minnesota and northwest Iowa tonight into Friday morning. Wind second if High Plains clusters organize. Do not send one crew to both a Cheyenne gust and a Rapid City wash without checking which county has a warning now.

Hotspot 3 — Southwest terrain leftover plus Ohio just-hit

The shortwave that drove Wednesday’s Arizona Moderate flood risk is leaving. WPC still keeps a Slight Risk over New Mexico and eastern Arizona into the San Juans and Sacramentos. Guidance still prints 1–3 inches on the Sangre de Cristos, San Juans, and interior New Mexico terrain. Sacramento Mountains burn-scar sensitivity remains in the discussion as locally Moderate impacts embedded inside a higher-end Slight. That is runoff on ground that already took water Wednesday, not a new Moderate upgrade.

Ohio is off today’s SPC Marginal. It is the just-hit desk. Overnight LSRs from the 16/1200Z–17/1159Z window include multiple trees down in Versailles and Piqua, a snapped hardwood onto a home awning in Darke County, barn sheet-metal loss and a blown silo near West Alexandria in Preble County, and trees and wires southeast of Mansfield in Richland County. NWS Cleveland had severe thunderstorm warnings into mid-evening Wednesday for Richland, Ashland, Holmes, and Knox counties. Those products are expired. The trees are still on the lines.

Just hit

SPC preliminary storm reports for the current 17/1200Z–18/1159Z cycle show no tornado, hail, or wind reports as of this afternoon desk. That is expected. The Intermountain and High Plains threats are still an afternoon and evening problem.

The last 24-hour ticket pile sits on the prior cycle (16/1200Z–17/1159Z): no tornadoes. Hail: 1.00 inch at Huntington, Emery County, Utah; 1.00 inch at East Carbon and Sunnyside, Carbon County, Utah; 1.00 to 1.25 inches near Linn Creek, Camden County, Missouri, with two-foot-diameter limbs down. Wind: downed power lines in Mesa, Maricopa County, Arizona; trees in Versailles, Darke County, and Piqua and Lockington, Miami County, Ohio; a snapped pole and large limb near Broken Arrow, Tulsa County, Oklahoma; a power line and a condo-garage roof near Osage Beach and Linn Creek, Missouri; barn roofing and a grain silo near West Alexandria, Preble County, Ohio; trees and wires southeast of Mansfield.

This morning’s Storm Tracker already covered the same outlook family at 1300 UTC. This afternoon desk updates to the 2000 UTC package, adds MCD 2304, and confirms still-zero watches and still-zero LSRs on today’s cycle.

Pulse table

Region	Main threats	SPC / NWS / WPC level	Status this afternoon
Southern / central ID into northern UT	Isolated hail and severe gusts; possible small clusters	SPC Marginal; MCD 2304 watch unlikely	Live afternoon–evening cells
NE CO / western NE / High Plains	Isolated severe gusts	SPC Marginal	Late afternoon clusters if heating punches
WY Front Range / SD / SW MN / NW IA	Flash flood, 2–4″ swaths	WPC Slight (high-end over SD)	Today’s organized water ticket
NM / E AZ / San Juans / Sacramentos	Flash flood, burn-scar debris flow	WPC Slight; leftover from Wed Moderate	Diurnal terrain cells
Western / north-central OH	Trees, wires, barn and roof damage	LSRs overnight; warnings expired	Just-hit
Emery / Carbon UT; Camden MO	Quarter to half-dollar hail	LSRs overnight	Just-hit / same offices own today’s risk
Atlantic / Gulf vs. U.S. mainland	No named cyclone	NHC: no tropical cyclones	Quiet on the mainland coast

What this means for restoration teams

Isolated severe hail on the Snake River Plain and Wasatch Front is a roof and auto-glass survey ticket if cells verify over Boise, Pocatello, Salt Lake, or Provo. Isolated High Plains gusts are tree, siding, and gutter work in a thin corridor. The organized ticket today is still water from the Wyoming Front Range across South Dakota into southwest Minnesota and northwest Iowa tonight. Flash flooding on leftover Arizona–New Mexico terrain is wet drywall and a same-night extraction clock if water is inside a structure that already took rain Wednesday. Ohio trees-on-wires from last night are a separate staffing problem from this afternoon’s West.

For teams near the Intermountain Marginal: stage before mid-afternoon local. Property owners should 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 High Plains and Southwest 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. MCD 2304 is watch-unlikely, not a watch. NHC reports no tropical cyclones in the Atlantic, eastern Pacific, or central Pacific as of this afternoon. The work, if it verifies, will be scattered: a hail swath through an Idaho or Utah county, a gust cluster on the High Plains, and heavier rain over South Dakota terrain tonight.

Looking ahead

SPC Day 2 (Friday, 1730 UTC package) holds Marginal Risk of isolated severe storms across parts of Idaho and Utah, Nebraska and Iowa, and the Piedmont of the Carolinas into north Georgia. Population centers listed on that outlook include Charlotte, Atlanta, Omaha, Lincoln, and Greensboro. WPC’s Day 1 water corridor over the Dakotas is the bridge into the Plains Marginal. The next Storm Tracker update should re-check the 0100 UTC Day 1 outlook and any new watches rather than assuming this afternoon’s Marginal stays the last word.

Sources and how to verify

Primary sources: NOAA Storm Prediction Center Sep 17, 2026 2000 UTC Day 1 Convective Outlook (Chalmers/Weinman); Mesoscale Discussion 2304 (Weinman/Hart); current convective watches (none valid; last issued Watch 669); SPC preliminary storm reports for the 20260917 cycle and 20260916 cycle; Weather Prediction Center Day 1 Excessive Rainfall Outlook (Kleebauer); National Hurricane Center Tropical Weather Outlook, September 17, 2026; NWS warning text archive including Cleveland OH overnight products now expired.

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: Intermountain West + High Plains Marginal, Dakotas Flood Slight — Thursday, September 17, 2026 (Morning).

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

September 17, 2026

Storm Updates: Upper Midwest Slight Risk, VA–NC Wind Scatter — Friday, September 11, 2026

This is a live Friday afternoon snapshot of local storm-type events across the United States as of Friday, September 11, 2026. The organized pulse is still ahead of most radar cores: the Storm Prediction Center 2000 UTC Day 1 Convective Outlook keeps a Slight Risk of severe thunderstorms across the Upper Midwest for late this afternoon and tonight. No convective watches are currently valid. Mesoscale Discussion 2281, issued 1937 UTC, flags a lower-end damaging-wind threat over parts of southern Virginia and northern North Carolina with watch issuance unlikely. The Weather Prediction Center holds a Slight Risk of excessive rainfall in far southern Arizona and northern Minnesota.

These remain county- and ZIP-scale thunderstorms, not a mainland hurricane landfall. Tropical Storm Norbert is in the Eastern Pacific well west-southwest of Baja California and poses no threat to U.S. land. Restoration exposure this afternoon is wind, water, hail, and trees: large hail and damaging wind in the Minnesota–northeast South Dakota Slight Risk, isolated wind in the Virginia–North Carolina scatter, flash-flood rates in northern Minnesota and Santa Cruz County, Arizona, plus residual hail and pole work from last night’s Texas Panhandle event. Conditions change fast. Verify with the National Weather Service for the specific county or ZIP before you roll.

What is live this afternoon

No severe thunderstorm or tornado watches are in effect as of the SPC watch page update Friday afternoon. The most recently issued watch remains Watch 665 from earlier in the week. Today’s official Local Storm Reports page (1200 UTC Friday through 1159 UTC Saturday) still shows no new tornado, hail, or wind reports in that window. Last night’s reports sit on the September 10 LSR page.

SPC’s 2000 UTC Day 1 outlook (forecaster Wendt, issued 0300 PM CDT) is mostly on track from the morning package. Scattered severe thunderstorms capable of large hail (some 2+ inches), damaging winds, and a couple of tornadoes are expected late this afternoon and tonight across parts of the Upper Midwest. Initiation farther south into the central Plains remains more uncertain and conditional. Marginal wind/hail probabilities were extended into more of central Kansas for overnight conditional storms as the cold front reaches northern Kansas Saturday morning.

WPC’s Day 1 Excessive Rainfall Outlook (updated 1601 UTC, valid 16Z Friday–12Z Saturday) keeps Slight Risk language over far southern Arizona and northern Minnesota. The 16Z update expanded a Marginal Risk eastward across more of the Florida Panhandle for 1–2+ inch local rates. Mid-South, Tennessee Valley, central Gulf Coast, and Southern Appalachians stay in the more widespread thunderstorm/flash-flood conversation at Marginal intensity.

Hotspot 1 — Upper Midwest Slight Risk (northeast SD into western and northern MN)

This is still the primary organized severe corridor. A mid-level shortwave and cold front support a narrow corridor of 60s F dewpoints, moderate destabilization, and 35–45 kt of deep-layer shear. Initial supercells favor large hail, isolated 2+ inches possible. Mode should trend toward clusters and bowing segments this evening as the low-level jet strengthens, shifting the main hazard toward damaging wind. A couple of tornadoes remain in the official language if any cells stay semi-discrete into early evening. The wind threat is expected to wane with eastward extent into western Wisconsin late tonight as the instability corridor stays narrow.

Cities and counties to watch: Watertown and Aberdeen vicinity in South Dakota; Willmar, St. Cloud, Fergus Falls, Brainerd, Hibbing, Duluth, and the Minnesota Arrowhead. Restoration read: hail first, then wind and trees after dark. Stage roof tarps, generators, and tree crews on the Minnesota side of the Slight Risk before evening clustering. Photograph only in remaining daylight if it is safe.

Hotspot 2 — Southern Virginia and northern North Carolina (MD 2281)

Mesoscale Discussion 2281 (valid 1937–2200 UTC) covers parts of southern Virginia and northern North Carolina. A stationary boundary from far northeastern North Carolina into south-central Virginia is the focus. Moderate surface-based buoyancy and steepening low-level lapse rates support loosely organized clusters capable of locally damaging gusts of 55–70 mph and isolated/marginally severe hail up to about 1.25 inches. Watch probability is 20 percent — watch unlikely.

Offices in the attention line: AKQ, MHX, LWX, RAH, RNK. Restoration read: treat this as scattered wind and tree work, not a regional line. One strong cluster can still drop a tree on a service drop or peel a section of roof. Do not staff it like Watch 665 from Wednesday.

Hotspot 3 — WPC flood pockets: northern Minnesota and far southern Arizona

The same shortwave that supports the Upper Midwest Slight Risk also carries a WPC Slight Risk of excessive rainfall over northern Minnesota. Official discussion cites precipitable water in the upper climatological percentile, possible training near the warm front, 1–2 inches (locally up to 3 inches), and rates approaching 1.5 inches per hour Friday afternoon and evening.

Far southern Arizona, especially the Santa Cruz County corridor, remains the other Slight Risk flood pocket on monsoon moisture with precipitable water above 1.5 inches. HREF guidance earlier today showed moderate-to-high chances of 3-hour QPF exceeding flash-flood guidance there. The Florida Panhandle was added to the broader Marginal flood language on the 16Z update for coastal 1–2+ inch rates.

Restoration read: northern Minnesota can be a dual ticket — hail/wind plus interior water if cores train. Southern Arizona is a flash-flood and poor-drainage desk. Florida Panhandle is localized urban flooding, not the national headline.

Just hit

Thursday evening into early Friday remains the live claim pile. Official September 10 LSRs include 2.25-inch hail near Lake Tanglewood and 2.00-inch hail at Timbercreek Canyon in Randall County, Texas; 1.75-inch and 1.25-inch stones around Lake Tanglewood and Pantex; an 87 mph thunderstorm gust 1 SE of Colby, Thomas County, Kansas; 67 mph near Pantex; 65 mph at Plainview, Hale County, Texas, with snapped power poles, an overturned construction trailer, damaged vehicles, and fences down; plus additional 60–62 mph gusts on the Texas South Plains. Residual high-water work from overnight Flash Flood Warnings in north-central West Virginia and southeastern Ohio is still on yesterday morning’s books.

No Atlantic tropical cyclone is present. NHC’s 200 PM EDT Friday Tropical Weather Outlook states tropical cyclone formation is not expected in the Atlantic, Caribbean, or Gulf of America during the next 7 days. Tropical Storm Norbert, 65 mph as of the late-morning Eastern Pacific package, is moving west well offshore and is not a U.S. land threat.

Pulse table

Region	Main threats	SPC / NWS / WPC level	Status this afternoon
NE SD / western & northern MN	Large hail (2+” possible), damaging wind, couple tornadoes	SPC Slight	Late afternoon–tonight
Southern VA / northern NC	Locally damaging gusts 55–70 mph, isolated hail	MD 2281, watch unlikely	Remainder of afternoon
Northern MN / far southern AZ	Flash-flood rates, training possible in MN	WPC Slight	Afternoon–evening
TX Panhandle / Colby KS	Hail to 2.25″, 60–87 mph gusts, poles/vehicles	Sept 10 LSRs	Just-hit / recovery
Central Plains / central KS overnight	Conditional hail/wind	SPC Marginal (expanded 20Z)	Evening–overnight if storms fire
Mid-South / TN Valley / Carolinas	Pulse damaging gusts, heavy rain	SPC Marginal	Scattered
Atlantic / Gulf vs. U.S. mainland	No landfalling tropical cyclone	NHC: no TC next 7 days	Quiet

What this means for restoration teams

The Texas Panhandle and Colby, Kansas, hits are already tickets: hail roofs and vehicles in Randall and Carson counties, wind-driven pole and debris work around Plainview and Colby. Today’s new work, if it verifies, is the Upper Midwest Slight Risk after peak heating — hail swaths first, then tree-and-wire clusters. Northern Minnesota can add interior water on the same shift. Virginia–North Carolina is a local wind desk, not a watch-scale deployment.

Stage Minnesota tarps and tree crews before dark. Property owners should photograph damage in daylight if it is safe, call the carrier, and start extraction the same night if water is inside. Do not send the same crew to both the Minnesota Slight Risk and last night’s Texas recovery without checking which county actually has a warning now.

What this is not

This is not a regional derecho and not a U.S. mainland hurricane landfall. There is no live tornado or severe thunderstorm watch as of this afternoon package. The work tonight, if it comes, will be scattered: a hail swath through a Minnesota or South Dakota county, a wind-downed tree in southern Virginia, a flooded wash in Santa Cruz County, Arizona, or leftover pole work in Hale County, Texas. That is the local-storm pattern this desk should staff.

Looking ahead

Saturday’s Day 2 Convective Outlook (1730 UTC, forecaster Jewell) drops to Marginal over parts of the Central Plains and from Ohio and West Virginia into western Pennsylvania. Widely scattered strong-to-severe storms are possible Saturday afternoon and evening over parts of the Central Plains, with isolated activity also possible in the Upper Ohio Valley. Critical fire-weather conditions remain in today’s fire outlook. Watch the next Storm Tracker update rather than assuming the Upper Midwest Slight Risk is the last line of the week.

Sources and how to verify

Primary sources: NOAA Storm Prediction Center Day 1 Convective Outlook issued 2000 UTC Friday, September 11, 2026; SPC Mesoscale Discussion 2281 issued 1937 UTC; SPC current watches page (no watches valid); SPC Local Storm Reports for 11 September (none in the new 12Z window as of this writing) and 10 September (Texas Panhandle and Colby, Kansas); Weather Prediction Center Day 1 Excessive Rainfall Outlook updated 1601 UTC; National Hurricane Center Atlantic Tropical Weather Outlook 200 PM EDT Friday; Eastern Pacific package on Tropical Storm Norbert. Morning desk on the same calendar day: Friday morning Storm Updates.

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. NWS warning text feed: national WWA text.

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

September 11, 2026