Illinois Severe Severe Thunderstorm Warning | Effective 08/11/2026 06:33

Headline: 
Severe Thunderstorm Warning issued August 11 at 8:33AM CDT until August 11 at 9:45AM CDT by NWS Quad Cities IA IL
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
August 11, 2026 - 6:33am
Expires: 
August 11, 2026 - 7:45am
Description: 
SVRDVN The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Whiteside County in northwestern Illinois... Southeastern Carroll County in northwestern Illinois... * Until 945 AM CDT. * At 832 AM CDT, severe thunderstorms were located along a line extending from Mississippi Palisades State Park to Andover to Malone, moving east at 45 mph. HAZARD...70 mph wind gusts. SOURCE...Radar indicated. This line of storms has a history of producing wind damage across portions of eastern Iowa. IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings. * Locations impacted include... Sterling, Rock Falls, Morrison, Fulton, Savanna, Prophetstown, Erie, Garden Plain, Milledgeville, Fairhaven, Tampico, Lyndon, Sabula, Chadwick, Coleta, Deer Grove, East Clinton, Emerson, Argo Fay, and Union Grove. This includes Interstate 88 between mile markers 14 and 44. This also includes Big Bend Fish and Wildlife Area, Morrison-Rockwood State Park, and Prophetstown State Park.
Instruction: 
Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. For your protection move to an interior room on the lowest floor of a sturdy building. This is a DANGEROUS SITUATION. These storms are producing widespread wind damage across portions of eastern Iowa. SEEK SHELTER NOW inside a sturdy structure and stay away from windows!
Area Description: 
Carroll, IL; Whiteside, IL
Forcast Office: 
NWS Quad Cities IA IL
Sender: 
w-nws.webmaster@noaa.gov