Severe Thunderstorm Warning — Columbia County, Wisconsin
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 9 at 10:06AM CDT until August 9 at 10:30AM CDT by NWS Milwaukee/Sullivan WI
At 1006 AM CDT, a severe thunderstorm was located over Cottage Grove, or near Marshall, moving east at 35 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Madison, Sun Prairie, Fitchburg, Stoughton, Waunakee, Verona, Oregon, McFarland, Monona, Windsor, Edgerton, Columbus, Marshall, Deforest, Cottage Grove, Belleville, Deerfield, Fall River, Shorewood Hills, and Cambridge. People attending Madison Ride the Drive should seek safe shelter immediately!
Effective August 9, 2026 at 11:06 AM ET · Expires August 9, 2026 at 11:30 AM ET
Event Details
Event Type
Severe Thunderstorm Warning
Severity
severe
Issued By
NWS Milwaukee/Sullivan WI
Expires
August 9, 2026 at 11:30 AM ET
Last Checked
33 minutes ago
What To Do
📋 Official NWS Guidance
For your protection move to an interior room on the lowest floor of a building. Continuous cloud to ground lightning is occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
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Get Severe Thunderstorm Warning Alerts for Columbia 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 Warning mean for Columbia County, Wisconsin?
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 (33 minutes ago). It's set to expire August 9, 2026 at 11:30 AM ET.
How do I get notified about Severe Thunderstorm Warning alerts for Columbia County?
Download StormCast free on Google Play and set Columbia County, Wisconsin 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.