Right now
The most recent data we hold from NOAA arrived 2 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 2 June 2026 at 23:30 UTC. It is kept here as a record.
No stronger detection stands among the 8 recorded within 20 km of this point since 2 June 2026 — 7 others scored the same.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 2 at 4:44PM MDT until June 2 at 5:30PM MDT by NWS Cheyenne WY
Nearby, since 2 June 2026
- June 23, 2026 · score 22 · 10.8 km
- June 5, 2026 · score 22 · 24.1 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 | 43.2464, -104.5164 |
| Nearest City | Rapid City (139 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-02T22:44:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.4dca9734865c342d94ba7f976461a762 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Converse, WY; Niobrara, WY; Fall River, SD |
| Headline | Severe Thunderstorm Warning issued June 2 at 4:44PM MDT until June 2 at 5:30PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-02T17:30:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4dca9734865c342d94ba7f976461a762f54f4450.001.1","noaa_urn:oid:2.49.0.1.840.0.83d9db32d37804a79b55c083d5804880c8dc7a83.002.1"] |
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.
Want to know when something happens in this area?