Severe Thunderstorm Watch — Mercer County, Illinois
Conditions favor the development of severe thunderstorms in and near the watch area.
Current Status
⛈️ Active: Severe Thunderstorm Watch
Severe Thunderstorm Watch issued August 9 at 8:43PM CDT until August 10 at 4:00AM CDT by NWS Quad Cities IA IL
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 550 IN EFFECT UNTIL 4 AM CDT MONDAY FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 9 COUNTIES IN NORTH CENTRAL ILLINOIS BUREAU PUTNAM IN NORTHWEST ILLINOIS CARROLL HENRY IL JO DAVIESS MERCER ROCK ISLAND STEPHENSON WHITESIDE IN IOWA THIS WATCH INCLUDES 3 COUNTIES IN EAST CENTRAL IOWA CLINTON JACKSON SCOTT THIS INCLUDES THE CITIES OF ALEDO, BETTENDORF, CLINTON, CREDIT ISLAND, DAVENPORT, FREEPORT, GALENA, GENESEO, HENNEPIN, MAQUOKETA, MOLINE, MOUNT CARROLL, PRINCETON, ROCK ISLAND, AND STERLING.
Effective August 9, 2026 at 9:43 PM ET · Expires August 10, 2026 at 5:00 AM ET
Event Details
Event Type
Severe Thunderstorm Watch
Severity
severe
Issued By
NWS Quad Cities IA IL
Expires
August 10, 2026 at 5:00 AM ET
Last Checked
23 minutes ago
Also In Effect For
This same Severe Thunderstorm Watch also covers:
Other Active Alerts in Illinois
Severe Thunderstorm Watch
Flood Advisory
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Get Severe Thunderstorm Watch Alerts for Mercer County
StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
Frequently Asked Questions
What does a Severe Thunderstorm Watch mean for Mercer County, Illinois?
Conditions favor the development of severe thunderstorms in and near the watch area.
Is this Severe Thunderstorm Watch currently active?
Yes — this alert is active as of our last check (23 minutes ago). It's set to expire August 10, 2026 at 5:00 AM ET.
How do I get notified about Severe Thunderstorm Watch alerts for Mercer County?
Download StormCast free on Google Play and set Mercer County, Illinois as one of your monitored locations. StormCast checks the NWS feed continuously and pushes alerts like this directly to your phone — even with the screen off.
What other areas does this alert cover?
This same Severe Thunderstorm Watch is also in effect for Clinton County, Henry County, Stephenson County, Jo Daviess County, Jackson County, Scott County, Carroll County, Rock Island County.