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Home Return to list Severe Thunderstorm Warning 0237 Issued by the Milwaukee / Sullivan Forecast Office
Action: New Issued At: 2026-08-09 10:35:17 201 WUUS53 KMKX 091535 SVRMKX WIC055-091615- /O.NEW.KMKX.SV.W.0237.260809T1535Z-260809T1615Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Milwaukee/Sullivan WI 1035 AM CDT Sun Aug 9 2026 The National Weather Service in Milwaukee/Sullivan has issued a * Severe Thunderstorm Warning for... Jefferson County in southeastern Wisconsin... * Until 1115 AM CDT. * At 1034 AM CDT, a severe thunderstorm was located over Fort Atkinson, moving east at 50 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Whitewater, Fort Atkinson, Jefferson, Lake Mills, Palmyra, Cambridge, Lake Ripley, Lake Koshkonong, Rome, Hebron, Sullivan, Busseyville, Helenville, and Nws Milwaukee/sullivan. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Large hail, damaging wind, and continuous cloud to ground lightning are occurring with this storm. Move indoors immediately. Lightning is one of natures leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4285 8901 4307 8901 4306 8854 4284 8854 TIME...MOT...LOC 1534Z 271DEG 42KT 4292 8889 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ MRC Action: Continued Issued At: 2026-08-09 10:53:17 572 WWUS53 KMKX 091553 SVSMKX Severe Weather Statement National Weather Service Milwaukee/Sullivan WI 1053 AM CDT Sun Aug 9 2026 WIC055-091615- /O.CON.KMKX.SV.W.0237.000000T0000Z-260809T1615Z/ Jefferson WI- 1053 AM CDT Sun Aug 9 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT FOR SOUTHEASTERN JEFFERSON COUNTY... At 1052 AM CDT, a severe thunderstorm was located over Palmyra, or 8 miles northeast of Whitewater, moving east at 50 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Whitewater, Jefferson, Johnson Creek, Palmyra, Rome, Hebron, Sullivan, Helenville, and Nws Milwaukee/sullivan. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of natures leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4285 8883 4307 8879 4306 8854 4284 8854 TIME...MOT...LOC 1552Z 271DEG 42KT 4292 8859 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ MRC Action: Continued Issued At: 2026-08-09 11:05:48 896 WWUS53 KMKX 091605 SVSMKX Severe Weather Statement National Weather Service Milwaukee/Sullivan WI 1105 AM CDT Sun Aug 9 2026 WIC055-091615- /O.CON.KMKX.SV.W.0237.000000T0000Z-260809T1615Z/ Jefferson WI- 1105 AM CDT Sun Aug 9 2026 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM CDT FOR SOUTHEASTERN JEFFERSON COUNTY... At 1105 AM CDT, a severe thunderstorm was located near Palmyra, or near East Troy, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Palmyra. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of natures leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4285 8868 4292 8861 4297 8854 4284 8854 TIME...MOT...LOC 1605Z 278DEG 37KT 4284 8850 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...<.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ MRC | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||