This alert expired on 26 July 2026 at 02:45 UTC. It is kept here as a record.
It is the 72nd strongest of the 120 detections recorded within 20 km of this point since 2 April 2026. Another comparable one was recorded here earlier the same day. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 25 at 9:37PM CDT until July 25 at 9:45PM CDT by NWS Aberdeen SD
An estimated 28,102 people live within 50 km of this point.
Nearby, since 2 April 2026
- June 30, 2026 · score 40 · 6.2 km
- July 25, 2026 · score 34 · 14.0 km
- August 30, 2026 · score 34 · 17.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 81 % 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) | 34 / 100 |
| Our confidence | 81% |
| Coordinates | 45.4123, -98.1594 |
| Nearest City | Aberdeen (26 km) |
| Population Exposed | 28.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-26T02:37:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Brown, SD; Brown, SD; Day, SD; Marshall, SD; Spink, SD |
| Headline | Severe Thunderstorm Warning issued July 25 at 9:37PM CDT until July 25 at 9:45PM CDT by NWS Aberdeen SD |
| Expires | 2026-07-25T21:45:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4db877e9d3c8bc3969b8ab60088f5542bff13730.002.1","noaa_urn:oid:2.49.0.1.840.0.e6d9afd6fb0a8622b72c32ffccac31d3982efbc6.001.1"] |
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 34/100, near Aberdeen (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.