Severe

Significant threat to life or property

Minnesota Severe Flash Flood Warning | Effective 09/18/2026 20:11

At 1011 PM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 2 and 4.5 inches of rain have fallen. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar and automated gauges. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor

Montana Severe Flash Flood Warning | Effective 09/18/2026 20:11

At 911 PM MDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 4.5 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, highways, streets and underpasses as well as other poor drainage and low-lying areas. Some locations that will experience flash flooding include...

Nebraska Severe Flash Flood Warning | Effective 09/18/2026 20:12

FFWCYS The National Weather Service in Cheyenne has issued a * Flash Flood Warning for... The South Fork Burn Scar in... Western Dawes County in the panhandle of Nebraska... East Central Sioux County in the panhandle of Nebraska... * Until 1115 PM MDT. * At 912 PM MDT, Doppler radar indicated thunderstorms producing heavy rain over the South Fork Burn Scar. Between 0.5 and 1 inch of rain has fallen. Additional rainfall amounts up to 1.5 inches are

Nebraska Severe Severe Thunderstorm Warning | Effective 09/18/2026 19:47

At 846 PM MDT, severe thunderstorms were located along a line extending from near Fort Robinson State Park to 11 miles northwest of Flahertys Corner to 9 miles southeast of Agate Fossil Beds National Monument, moving east at 30 mph. HAZARD...60 mph wind gusts and half dollar size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... Crawford, Soldier Creek Campground, Fort Robinson State Park, and

Illinois, Indiana Severe Flood Watch | Effective 09/18/2026 19:49

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Central Cook, De Kalb, DuPage, Kane, Kendall, Lake IL, Lee, Northern Cook, Northern Will and Southern Cook and northwest Indiana, including the following areas, Lake IN and Porter. * WHEN...From 4 AM CDT Saturday through Saturday afternoon. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Roads and streets may

Illinois Severe Flood Watch | Effective 09/18/2026 19:49

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of north central and northeast Illinois, including the following counties, in north central Illinois, Boone, Ogle and Winnebago. In northeast Illinois, McHenry. * WHEN...From 1 AM CDT Saturday through Saturday afternoon. * IMPACTS...Creeks and streams may rise out of their banks. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Showers and thunderstorms overnight into Saturday morning may

Wisconsin Severe Flood Watch | Effective 09/18/2026 19:49

* WHAT...Flooding and flash flooding caused by excessive rainfall are possible. * WHERE...Portions of south central and southeast Wisconsin, including the following counties, in south central Wisconsin, Dane, Green, Iowa, Lafayette and Rock. In southeast Wisconsin, Jefferson, Kenosha, Milwaukee, Racine, Walworth and Waukesha. * WHEN...From 1 AM CDT Saturday through Saturday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations.

Wisconsin Severe Flood Watch | Effective 09/18/2026 19:49

* WHAT...Flooding and flash flooding caused by excessive rainfall are possible. * WHERE...Portions of east central, south central, and southeast Wisconsin, including the following counties, in east central Wisconsin, Fond du Lac and Sheboygan. In south central Wisconsin, Columbia, Green Lake, Marquette and Sauk. In southeast Wisconsin, Dodge, Ozaukee and Washington. * WHEN...From 1 AM CDT Saturday through Saturday afternoon. * IMPACTS...Excessive runoff may result in flooding and flash

Minnesota Severe Flood Watch | Effective 09/18/2026 19:18

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of south central Minnesota, including the following county, Freeborn. * WHEN...Until 4 AM CDT Saturday. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - The threat for training thunderstorms with heavy rainfall continues this evening where repeated rounds of storms move

Nebraska Severe Severe Thunderstorm Warning | Effective 09/18/2026 19:18

At 816 PM MDT, severe thunderstorms were located along a line extending from 14 miles southwest of Agate Fossil Beds National Monument to Mitchell to 8 miles south of Hubbard Hill, moving east at 25 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Scottsbluff, Gering, Mitchell, Terrytown, Morrill, Wildcat Hills State Recreation Area, Lake Minatare State Recreation Area, Lake
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