Severe Thunderstorm Warning for Cass, Itasca, St. Louis Counties MN
This alert is no longer in effect.
NOAA issued it on August 17, 2026, 6 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 Duluth has issued a Severe Thunderstorm Warning for southern Itasca, northeastern Cass, and west central St. Louis counties in Minnesota until 6:15 PM CDT.
Read this weather record in 30 seconds
- Record type
- Severe Thunderstorm Warning
- Affected area
- Northern Minnesota
- Issued
- August 17, 2026
- Issuing authority
- NWS Duluth MN
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 6 days ago; use the issuing agency's live warning service for current conditions in Northern Minnesota.
Alert Details
Severe Thunderstorm Warning issued by NWS Duluth MN. Effective from 5:22 PM CDT August 17, 2026, until 6:15 PM CDT August 17, 2026.
Affected Areas
Southern Itasca County in north central Minnesota; Northeastern Cass County in north central Minnesota; West central St. Louis County in northeastern Minnesota. Locations in the path include Deer River, Bena, Ball Club, Lake Winnibigoshish, Hibbing, Nashwauk, Taconite, Zemple, Coleraine, Keewatin, Cohasset, Grand Rapids, Chisholm, Days High Landing, and Pengilly.
What You Should Do
For your protection move to an interior room on the lowest floor of a building.
Expected Conditions
At 5:21 PM CDT, severe thunderstorms were located along a line extending from 13 miles southwest of McCarthy Beach State Park to 10 miles north of Taconite to near Bena, moving east at 25 mph. Hazard: Quarter size hail. Max hail size: 1.00 inch. Max wind gust: Up to 50 MPH. Source: Radar indicated. Impact: Damage to vehicles is expected.
Timeline
Alert effective immediately on August 17, 2026, at 5:22 PM CDT and expires at 6:15 PM CDT the same day.
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 (1,122 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 17, 2026.
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