This alert expired on 8 June 2026 at 08:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 24 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 8 at 2:52AM CDT until June 8 at 3:15AM CDT by NWS Grand Forks ND
Nearby, since 15 March 2026
- July 10, 2026 · score 22 · 14.1 km
- August 11, 2026 · score 22 · 17.1 km
- July 20, 2026 · score 22 · 18.8 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.
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) | 22 / 100 |
| Our confidence | 61% |
| Coordinates | 46.0238, -98.7776 |
| Nearest City | Aberdeen (67 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-08T07:52:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.2d5e8b069d4bb068e0261848a7c45baa |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Barnes, ND; Cass, ND; Ransom, ND; Sargent, ND; Campbell, SD; Edmunds, SD; Faulk, SD; McPherson, SD; Potter, SD; Walworth, SD |
| Headline | Severe Thunderstorm Warning issued June 8 at 2:52AM CDT until June 8 at 3:15AM CDT by NWS Grand Forks ND |
| Expires | 2026-06-08T03:15:00-05:00 |
| SenderName | NWS Grand Forks ND |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2d5e8b069d4bb068e0261848a7c45baa3e60804b.001.1","noaa_urn:oid:2.49.0.1.840.0.339b6d008a5349bf8603bd3505279f1cad0f27f9.001.1"] |
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 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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.