Right now
The most recent data we hold from NOAA arrived 1 minute 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 2 June 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 75 recorded within 20 km of this point since 15 March 2026 — 32 others scored the same. Another comparable one was recorded here earlier the same day. 20 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 2 at 4:19PM MDT until June 2 at 5:00PM MDT by NWS Cheyenne WY
Nearby, since 15 March 2026
- July 31, 2026 · score 22 · 13.6 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 | 43.2338, -103.7205 |
| Nearest City | Rapid City (102 km) |
| Impact Tier | minor |
| Date | 2026-06-02 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.e06e556b834436366959ee049ea6056b |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Converse, WY; Niobrara, WY; Custer, SD; Fall River, SD; Niobrara, WY and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 2 at 4:19PM MDT until June 2 at 5:00PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-02T17:00:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e06e556b834436366959ee049ea6056b1148e003.001.1","noaa_urn:oid:2.49.0.1.840.0.e886f31128cc9db9f031c1108c1234add920daff.001.1","noaa_urn:oid:2.49.0.1.840.0.76effa312997619c5459f645567f05bd4391dcf9.001.1","noaa_urn:oid:2.49.0.1.840.0.d3398125ea16f6effcb431baacdf2ac39d355261.002.1","noaa_urn:oid:2.49.0.1.840.0.e7c0a37992dc57e37b9faf2de2445d4bef1ded41.001.1","noaa_urn:oid:2.49.0.1.840.0.2bec9b03bb63d693286136c3e607ad8c5f72966a.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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