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Severe Thunderstorm Warning for Rock Island, IL; Whiteside, IL; Clinton, IA +1 more

This alert has ended.Kept for recent context. Do not use it as a current warning.

Official alert fields

What you need to know

Effective
Ended
Official severity
Severe
Official urgency
Immediate
Official certainty
Observed

What is happening

At 849 AM CDT, severe thunderstorms were located along a line extending from Camanche to near Port Byron to Campbells Island, moving east at 50 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...

What the bulletin says to do

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. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.

Read official NWS bulletin

Full official description

Bulletin details

At 849 AM CDT, severe thunderstorms were located along a line extending from Camanche to near Port Byron to Campbells Island, moving east at 50 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... Davenport, Bettendorf, Clinton, Eldridge, DeWitt, Camanche, Le Claire, Hampton, Port Byron, Rapids City, Albany, Princeton, Long Grove, Cordova, McCausland, Low Moor, East Clinton, Hillsdale, Malone, and Folletts. This includes the following highways... Interstate 74 in Iowa near mile marker 1. Interstate 80 in Iowa between mile markers 291 and 306. Interstate 80 in Illinois near mile marker 1. Interstate 88 between mile markers 6 and 14. Interstate 280 near mile marker 1.

Lifecycle record

Official revisions

2 captured
  1. Update

    Severe Thunderstorm Warning issued August 11 at 8:49AM CDT until August 11 at 9:15AM CDT by NWS Quad Cities IA IL

    Official revision
  2. Alert

    Severe Thunderstorm Warning issued August 11 at 8:20AM CDT until August 11 at 9:15AM CDT by NWS Quad Cities IA IL

    Official revision

Source and limitations

Publisher: Weather Alert Watch. Primary source: NWS Quad Cities IA IL. This page reorganizes official fields and does not add a forecast or expand the affected area.

CAP status
Actual
Message type
Update
Last collected
Methodology and corrections