This alert expired on 3 September 2026 at 23:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 15 detections recorded within 20 km of this point since 2 April 2026. The last comparable one was on 4 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 4:56PM CDT until September 3 at 6:00PM CDT by NWS Duluth MN
Nearby, since 2 April 2026
- September 3, 2026 · score 16 · 0.7 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 16 out of 100, at 66 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Our confidence | 66% |
| Coordinates | 47.4050, -94.5562 |
| Nearest City | Hibbing (122 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-03T21:56:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.2727825614ce40978fb2174ff68e4fba203502de.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cass, MN; Itasca, MN; Becker, MN; Beltrami, MN; Clearwater, MN; Hubbard, MN |
| Headline | Severe Thunderstorm Warning issued September 3 at 4:56PM CDT until September 3 at 6:00PM CDT by NWS Duluth MN |
| Expires | 2026-09-03T18:00:00-05:00 |
| SenderName | NWS Duluth MN |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2727825614ce40978fb2174ff68e4fba203502de.001.1","noaa_urn:oid:2.49.0.1.840.0.4a86911cb33f619973abff150b8c1a02c7a7d3bd.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 16 N Park Rapids |
| Iem County | Hubbard |
| Iem State | MN |
| Iem Wfo | FGF |
| Iem Remark | Broadcast media relayed report of 1 inch hail 16 miles north of Park Rapids. Time matches when report was relayed to NWS. |
| MergedSources | [{"id":"iem_H_47.150_-95.060_1788472740000","source":"iem","severity":"low","severityValue":25,"timestamp":1788472740000,"latitude":47.15,"longitude":-95.06}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.