This alert expired on 3 September 2026 at 18:15 UTC. It is kept here as a record.
No stronger detection stands among the 7 recorded within 20 km of this point since 14 May 2026 — 5 others scored the same. The last comparable one was on 4 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 12:13PM CDT until September 3 at 1:15PM CDT by NWS Grand Forks ND
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 16 out of 100, at 67 % 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 | 67% |
| Coordinates | 47.9283, -98.0193 |
| Nearest City | Grand Forks (74 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-03T17:13:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.de761467fa725524470a766169b18115b733fef8.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Grand Forks, ND; Griggs, ND; Nelson, ND; Steele, ND; Traill, ND; Eddy, ND; Nelson, ND; Ramsey, ND; Walsh, ND |
| Headline | Severe Thunderstorm Warning issued September 3 at 12:13PM CDT until September 3 at 1:15PM CDT by NWS Grand Forks ND |
| Expires | 2026-09-03T13:15:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.de761467fa725524470a766169b18115b733fef8.001.1","noaa_urn:oid:2.49.0.1.840.0.403873cd6c02a25f3f7cf009ac644cedd33ff2cc.002.1"] |
| Spc ReportType | wind |
| Spc Speed | 58 |
| Spc Location | 1 WSW Devils Lake |
| Spc County | Ramsey |
| Spc State | ND |
| Spc Comments | Personal Weather Station. (FGF) |
| MergedSources | [{"id":"spc_wind_48.04_-98.89_19","source":"spc","severity":"medium","severityValue":45,"timestamp":1788453000000,"latitude":48.04,"longitude":-98.89},{"id":"spc_wind_47.99_-98.72_20","source":"spc","severity":"medium","severityValue":45,"timestamp":1788453720000,"latitude":47.99,"longitude":-98.72},{"id":"spc_wind_48.11_-98.87_21","source":"spc","severity":"medium","severityValue":45,"timestamp":1788453840000,"latitude":48.11,"longitude":-98.87}] |
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.