This alert expired on 7 August 2026 at 01:52 UTC. It is kept here as a record.
No stronger detection stands among the 20 recorded within 20 km of this point since 4 April 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 6 at 8:42PM CDT until August 6 at 8:45PM CDT by NWS Grand Forks ND
An estimated 194,125 people live within 50 km of this point.
Nearby, since 4 April 2026
- July 30, 2026 · score 43 · 16.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 86 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 86% |
| Coordinates | 46.7140, -97.2200 |
| Nearest City | West Fargo (30 km) |
| Population Exposed | 194.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-07T01:42:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5fe346c7bb88aa39821e136bb3e7e457d7a2e9a8.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cass, ND |
| Headline | Severe Thunderstorm Warning issued August 6 at 8:42PM CDT until August 6 at 8:45PM CDT by NWS Grand Forks ND |
| Expires | 2026-08-06T20:52:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 2 N Leonard |
| Iem County | Cass |
| Iem State | ND |
| Iem Wfo | FGF |
| Iem Remark | Hail had ended by time of call. |
| MergedSources | [{"id":"iem_H_46.670_-97.240_1786065900000","source":"iem","severity":"low","severityValue":25,"timestamp":1786065900000,"latitude":46.67,"longitude":-97.24}] |
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 West Fargo?
Calamity.live data shows a weather event with CalamityScore 43/100, near West Fargo (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.