Severe Thunderstorm Warning for Clayton County IA and Grant County WI
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NWS La Crosse has issued a Severe Thunderstorm Warning for central Clayton County in Iowa and west central Grant County in Wisconsin until 5:15 PM CDT.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Northeastern Iowa and Southwestern Wisconsin
- Issued
- September 4, 2026
- Issuing authority
- NWS La Crosse WI
Storm notices can cover different combinations of wind, hail, lightning, and rainfall. Use the original notice for the hazards and boundaries attached to this specific record.
Record status: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
Severe Thunderstorm Warning issued by NWS La Crosse WI. Effective from September 4, 2026 at 4:31 PM CDT until September 4, 2026 at 5:15 PM CDT. Alert type code: SVR.
Affected Areas
Central Clayton County in northeastern Iowa and west central Grant County in southwestern Wisconsin. Specific locations include Garnavillo, Wyalusing State Park, National, Jellystone Park Near Bagley, Patch Grove, Pikes Peak State Park, Clayton Center, and County Roads X 47 and C 7 X.
What You Should Do
For your protection move to an interior room on the lowest floor of a building.
Expected Conditions
At 4:30 PM CDT, a severe thunderstorm was located near Farmersburg, or 8 miles southwest of Prairie Du Chien, moving southeast at 20 mph. Hazards include 60 mph wind gusts and penny size hail (0.75 inch). Radar indicated. Expect damage to roofs, siding, and trees.
Timeline
The warning is in effect until 5:15 PM CDT on September 4, 2026. The storm will be near Garnavillo around 4:45 PM CDT.
Original source: NOAA Official Notice ↗
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Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (1,011 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to September 4, 2026.
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