Severe Thunderstorm Warning for Winona MN and Wisconsin Counties
This alert is no longer in effect.
NOAA issued it on August 18, 2026, 5 days ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
NWS La Crosse WI issued a Severe Thunderstorm Warning for eastern Winona County MN and parts of Buffalo, La Crosse, and Trempealeau counties WI until 3:15 PM CDT August 18.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Southeastern Minnesota and West Central Wisconsin
- Issued
- August 18, 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: historical. It was issued 5 days ago; use the issuing agency's live warning service for current conditions in Southeastern Minnesota and West Central Wisconsin.
Alert Details
A Severe Thunderstorm Warning was issued by NWS La Crosse WI on August 18 at 2:36 PM CDT. The alert is effective from 2026-08-18T14:36:00-05:00 until 2026-08-18T15:15:00-05:00.
Affected Areas
The warning covers Eastern Winona County in southeastern Minnesota; Southeastern Buffalo County, Northern La Crosse County, and Southern Trempealeau County in west central Wisconsin. Locations impacted include Winona, Trempealeau, Galesville, Holmen, Brice Prairie, Dakota, North Side Of La Crosse, Lock And Dam 5 A, Camp Decorah, Dodge, Perrot State Park, Stevenstown, and Ridgeway. It includes Interstate 90 in Minnesota between mile markers 249 and 276 and Interstate 90 in Wisconsin between mile markers 1 and 6.
What You Should Do
For your protection move to an interior room on the lowest floor of a building.
Expected Conditions
At 2:36 PM CDT, severe thunderstorms were located along a line extending from near Galesville to Stockton, moving southeast at 25 mph. Hazards include 60 mph wind gusts and quarter size hail (1.00 inch). Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees.
Timeline
The warning is in effect until 3:15 PM CDT on August 18, 2026. Severe thunderstorms will be near Winona, Trempealeau, and Galesville around 2:40 PM CDT; Holmen and Brice Prairie around 2:55 PM CDT; and Dakota around 3:00 PM CDT.
Original source: NOAA Official Notice ↗
Related Weather Alerts
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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 (1,387 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 18, 2026.
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