This alert expired on 30 August 2026 at 04:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 16 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 29 at 10:46PM CDT until August 29 at 11:00PM 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 22 out of 100, at 62 % 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 | 62% |
| Coordinates | 44.7810, -100.3949 |
| Nearest City | Aberdeen (167 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-30T03:46:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Hand, SD; Potter, SD; Sully, SD; Ziebach, SD and 1 more areas |
| Headline | Severe Thunderstorm Warning issued August 29 at 10:46PM CDT until August 29 at 11:00PM CDT by NWS Aberdeen SD |
| Expires | 2026-08-29T23:00:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c401f8ca47e157ed2103a725047c08559757d92d.001.1","noaa_urn:oid:2.49.0.1.840.0.2c77a6ebd1e6e8c3d7a4ca7390f089f85ecbd609.001.1","noaa_urn:oid:2.49.0.1.840.0.b9fac5e38b2066d22c8fa2020be69503cf9d7e89.001.1","noaa_urn:oid:2.49.0.1.840.0.cba4ee4bfa48aaa290b97a1f9906bb0b01e279e3.001.1"] |
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 Aberdeen (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.