Severe Thunderstorm Warning for Northwest Iowa and Southwest Minnesota
This alert is no longer in effect.
NOAA issued it on September 2, 2026, 2 weeks 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 Sioux Falls has issued a Severe Thunderstorm Warning until 11:45 PM CDT for multiple counties in IA and MN, with 70 mph winds and nickel-size hail observed.
30 seconds on this weather notice
- Record type
- Severe Thunderstorm Warning
- Affected area
- Northwest Iowa and Southwest Minnesota
- Issued
- September 2, 2026
- Issuing authority
- NWS Sioux Falls SD
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 2 weeks ago; use the issuing agency's live warning service for current conditions in Northwest Iowa and Southwest Minnesota.
Alert Details
Severe Thunderstorm Warning issued by NWS Sioux Falls SD (NOAA). Effective from September 1, 2026 at 10:34 PM CDT until September 1, 2026 at 11:45 PM CDT. Alert type code: SVR.
Affected Areas
Counties in Iowa: Dickinson (northwestern), Lyon (eastern), O'Brien (northwestern), Osceola, Sioux (northeastern). Counties in Minnesota: Cottonwood, Jackson, Murray, Nobles, Rock (eastern). Specific locations in path include Worthington, Ocheyedan, Round Lake, Wilmont, Lismore, Harris, Lake Park, Brewster, Fulda, Spirit Lake, Lakefield, Okoboji, Heron Lake, Wahpeton, Orleans, Kilen Woods State Park, Windom, Jackson, Bergen, Westbrook, Storden, Jeffers, Bingham Lake and Mountain Lake.
What You Should Do
Remain alert for a possible tornado. If you spot a tornado, go at once into the basement or small central room in a sturdy structure. Prepare immediately for damaging winds. People outside should move immediately to shelter inside a strong building. Stay away from windows. To report severe weather, contact your nearest law enforcement agency.
Expected Conditions
At 10:34 PM CDT, severe thunderstorms located along a line extending from near Lismore to 7 miles northwest of Ocheyedan to near Sanborn, moving northeast at 65 mph. Hazards include 70 mph wind gusts and nickel size hail (0.88 inch). Radar indicated. Expect considerable tree damage; damage likely to mobile homes, roofs, and outbuildings. Tornado detection: possible.
Timeline
Issued and effective September 1, 2026 at 10:34 PM CDT. Expires and ends September 1, 2026 at 11:45 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 (1,584 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to September 2, 2026.
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