This alert expired on 31 August 2026 at 05:00 UTC. It is kept here as a record.
No stronger detection stands among the 19 recorded within 20 km of this point since 31 March 2026 — 9 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 30 at 10:54PM CDT until August 31 at 12:00AM CDT by NWS Grand Forks ND
Nearby, since 31 March 2026
- August 31, 2026 · score 22 · 6.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 61 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 47.6132, -98.0880 |
| Nearest City | Grand Forks (87 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-31T03:54:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Grand Forks, ND; Steele, ND; Nelson, ND; Ramsey, ND; Barnes, ND; Griggs, ND |
| Headline | Severe Thunderstorm Warning issued August 30 at 10:54PM CDT until August 31 at 12:00AM CDT by NWS Grand Forks ND |
| Expires | 2026-08-31T00:00:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.fb6da3045fe30d5c28ed088d2275128c40626c9e.001.1","noaa_urn:oid:2.49.0.1.840.0.4ab00acc85219b98a56e18137870857df78e345e.002.1","noaa_urn:oid:2.49.0.1.840.0.e50eb162cd0365279e211654a4a22ae4e99c5ae6.001.1"] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 22/100, near Grand Forks (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.