Severe Thunderstorm Warning — Henderson County, Illinois
A thunderstorm capable of producing damaging winds of 58+ mph and/or 1-inch hail has been detected.
Current Status
⛈️ Active: Severe Thunderstorm Warning
Severe Thunderstorm Warning issued August 12 at 8:20AM CDT until August 12 at 9:15AM CDT by NWS Quad Cities IA IL
SVRDVN The National Weather Service in the Quad Cities has issued a * Severe Thunderstorm Warning for... Northern Hancock County in west central Illinois... Southern Henderson County in west central Illinois... Southern Warren County in west central Illinois... McDonough County in west central Illinois... Central Lee County in southeastern Iowa... * Until 915 AM CDT. * At 820 AM CDT, severe thunderstorms were located along a line extending from near Montrose to Disco to near Smithshire, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Trained weather spotters. At 809 AM the Burlington Airport measured a 58 mph wind gust. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Macomb, Fort Madison, Keokuk, Carthage, Nauvoo, Bushnell, Hamilton, Colchester, La Harpe, Roseville, Dallas City, Montrose, Stronghurst, Avon, Blandinsville, Good Hope, Prairie City, Carman, Biggsville, and Terre Haute. This also includes Argyle Lake State Park and N
Effective August 12, 2026 at 9:20 AM ET · Expires August 12, 2026 at 10:15 AM ET
Event Details
Event Type
Severe Thunderstorm Warning
Severity
severe
Issued By
NWS Quad Cities IA IL
Expires
August 12, 2026 at 10:15 AM ET
Last Checked
51 minutes ago
What To Do
📋 Official NWS Guidance
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.
Also In Effect For
This same Severe Thunderstorm Warning also covers:
Other Active Alerts in Illinois
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Severe Thunderstorm Watch
Get Severe Thunderstorm Warning Alerts for Henderson County
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Frequently Asked Questions
What does a Severe Thunderstorm Warning mean for Henderson County, Illinois?
A thunderstorm capable of producing damaging winds of 58+ mph and/or 1-inch hail has been detected.
Is this Severe Thunderstorm Warning currently active?
Yes — this alert is active as of our last check (51 minutes ago). It's set to expire August 12, 2026 at 10:15 AM ET.
How do I get notified about Severe Thunderstorm Warning alerts for Henderson County?
Download StormCast free on Google Play and set Henderson 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 Warning is also in effect for Warren County.