This alert expired on 8 July 2026 at 00:15 UTC. It is kept here as a record.
It is the 4th strongest of the 9 detections recorded within 20 km of this point since 4 April 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 7 at 6:41PM CDT until July 7 at 7:15PM CDT by NWS Aberdeen SD
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 59 % 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) | 16 / 100 |
| Our confidence | 59% |
| Coordinates | 45.8433, -100.3517 |
| Nearest City | Bismarck (112 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-07T23:41:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Campbell, SD; Corson, SD |
| Headline | Severe Thunderstorm Warning issued July 7 at 6:41PM CDT until July 7 at 7:15PM CDT by NWS Aberdeen SD |
| Expires | 2026-07-07T19:15:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
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 16/100, near Bismarck (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.