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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 3 June 2026 at 03:00 UTC. It is kept here as a record.
It is the 30th strongest of the 184 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued June 2 at 1:42PM MDT until June 2 at 9:00PM MDT by NWS Rapid City SD
Nearby, since 15 March 2026
- August 31, 2026 · score 22 · 0.0 km
- August 27, 2026 · score 22 · 0.0 km
- August 12, 2026 · score 22 · 0.0 km
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 60 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 43.9000, -99.4000 |
| Nearest City | Mitchell (112 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-02T19:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.d20234467fbd38f29c1e58fe65884991 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Bennett, SD; Butte, SD; Custer, SD; Fall River, SD; Haakon, SD; Harding, SD; Jackson, SD; Lawrence, SD; Meade, SD; Mellette, SD; Oglala Lakota, SD; Pennington, SD; Perkins, SD; Todd, SD; Ziebach, SD; Corson, SD; Dewey, SD; Jones, SD; Stanley, SD |
| Headline | Severe Thunderstorm Watch issued June 2 at 1:42PM MDT until June 2 at 9:00PM MDT by NWS Rapid City SD |
| Expires | 2026-06-02T21:00:00-06:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d20234467fbd38f29c1e58fe65884991c9950eec.001.1","noaa_urn:oid:2.49.0.1.840.0.ac3b6b878e5ffcebbc2d19262510e2b6ecf38027.001.1"] |
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 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.
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