This alert expired on 31 August 2026 at 00:00 UTC. It is kept here as a record.
It is the 11th strongest of the 14 detections recorded within 20 km of this point since 9 June 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 30 at 6:29PM CDT until August 30 at 7:00PM 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 16 out of 100, at 60 % 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 | 60% |
| Coordinates | 46.5767, -101.7292 |
| Nearest City | Mandan (70 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-30T23:29:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Corson, SD; Grant, ND; Morton, ND; Bottineau, ND; Renville, ND; Ward, ND and 2 more areas |
| Headline | Severe Thunderstorm Warning issued August 30 at 6:29PM CDT until August 30 at 7:00PM CDT by NWS Aberdeen SD |
| Expires | 2026-08-30T19:00:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e2a0c6c64f86623d20f301f1ac8f9bad4da194d8.001.1","noaa_urn:oid:2.49.0.1.840.0.e2a0c6c64f86623d20f301f1ac8f9bad4da194d8.001.1","noaa_urn:oid:2.49.0.1.840.0.18b5a5971f46a0e6abc5814f18927ae544fac0e2.002.1","noaa_urn:oid:2.49.0.1.840.0.18b5a5971f46a0e6abc5814f18927ae544fac0e2.002.1","noaa_urn:oid:2.49.0.1.840.0.ed78b914a6497fc0d717998dacaf146d67880b77.001.1","noaa_urn:oid:2.49.0.1.840.0.ed78b914a6497fc0d717998dacaf146d67880b77.001.1","noaa_urn:oid:2.49.0.1.840.0.fba36ec71e60ca20185055502b6ca98dd12e7d79.001.1","noaa_urn:oid:2.49.0.1.840.0.fba36ec71e60ca20185055502b6ca98dd12e7d79.001.1","noaa_urn:oid:2.49.0.1.840.0.95583944599e1611968f6da01aeaea7cca553a73.001.1","noaa_urn:oid:2.49.0.1.840.0.95583944599e1611968f6da01aeaea7cca553a73.001.1"] |
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 16/100, near Mandan (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.