Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, 6 km from here.
This alert expired on 5 September 2026 at 23:15 UTC. It is kept here as a record.
It is the 12th strongest of the 21 detections recorded within 20 km of this point since 8 April 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 5 at 6:02PM CDT until September 5 at 6:15PM CDT by NWS Aberdeen SD
Nearby, since 8 April 2026
- June 3, 2026 · score 22 · 18.9 km
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 60 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Our confidence | 60% |
| Coordinates | 45.3309, -100.2255 |
| Nearest City | Aberdeen (136 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-05T23:02:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.eaf58086aaf9da0559c7559ead2597b676c0b377.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Potter, SD; Walworth, SD |
| Headline | Severe Thunderstorm Warning issued September 5 at 6:02PM CDT until September 5 at 6:15PM CDT by NWS Aberdeen SD |
| Expires | 2026-09-05T18:15:00-05:00 |
| 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 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 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.