Right now
The most recent data we hold from NOAA arrived 6 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 13 km from here.
This alert expired on 4 September 2026 at 01:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 29 detections recorded within 20 km of this point since 14 May 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 3 at 7:19PM CDT until September 3 at 8:15PM CDT by NWS Grand Forks ND
An estimated 57,011 people live within 50 km of this point.
Nearby, since 14 May 2026
- June 3, 2026 · score 32 · 10.7 km
- June 4, 2026 · score 32 · 11.8 km
- July 24, 2026 · score 63 · 20.3 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 45 out of 100, at 91 % 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 | High |
| Calamity Score (ours) | 45 / 100 |
| Our confidence | 91% |
| Coordinates | 47.9654, -96.6746 |
| Nearest City | Grand Forks (27 km) |
| Population Exposed | 57.0K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-04T00:19:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.758646c7a6f515ea0536cf79a8c0f0b0533e8145.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Marshall, MN; Pennington, MN; Polk, MN; Red Lake, MN |
| Headline | Severe Thunderstorm Warning issued September 3 at 7:19PM CDT until September 3 at 8:15PM CDT by NWS Grand Forks ND |
| Expires | 2026-09-03T20:15:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| Spc ReportType | wind |
| Spc Speed | 75 |
| Spc Location | 6 SW Warren |
| Spc County | Polk |
| Spc State | MN |
| Spc Comments | NDAWN 3 meter wind gust. (FGF) |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | Warren |
| Iem County | Marshall |
| Iem State | MN |
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 near Grand Forks?
Calamity.live data shows a weather event with CalamityScore 45/100, near Grand Forks (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.