⚠️ Severe Thunderstorm Warning – Carroll, IL; Whiteside, IL; Clinton, IA; Jackson, IA – Friday, August 21, 2026

Severe Thunderstorm Warning issued August 21 at 6:54PM CDT until August 21 at 8:00PM CDT by NWS Quad Cities IA IL

Details

SVRDVN

The National Weather Service in the Quad Cities has issued a

* Severe Thunderstorm Warning for…
Northwestern Whiteside County in northwestern Illinois…
South central Carroll County in northwestern Illinois…
Southeastern Jackson County in east central Iowa…
Northeastern Clinton County in east central Iowa…

* Until 800 PM CDT.

* At 653 PM CDT, severe thunderstorms were located along a line
extending from near Savanna to Preston, moving southeast at 30 mph.

HAZARD…60 mph wind gusts and quarter size hail.

SOURCE…Radar indicated.

IMPACT…Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.

* Locations impacted include…
Clinton, Morrison, Fulton, Savanna, Garden Plain, Preston,
Fairhaven, Albany, Sabula, Miles, Andover, East Clinton, Argo Fay,
Union Grove, Ustick, Thomson, Wacker, Ideal, Teeds Grove, and
Malvern.

This also includes Morrison-Rockwood State Park.

Instructions

For your protection move to an interior room on the lowest floor of a
sturdy building.

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

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.