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.
2 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 7 September 2026 at 07:03 UTC. It is kept here as a record.
It is the 56th strongest of the 75 detections recorded within 20 km of this point since 5 May 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 7 at 12:54AM MDT until September 7 at 1:00AM MDT by NWS Cheyenne WY
Nearby, since 5 May 2026
- July 28, 2026 · score 22 · 9.2 km
- May 21, 2026 · score 22 · 14.8 km
- July 10, 2026 · score 22 · 15.8 km
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 61 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Our confidence | 61% |
| Coordinates | 42.4700, -103.1700 |
| Nearest City | Rapid City (179 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-07T06:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.d540a7da0ddab06c572cc03d45aafba04036078f.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Box Butte, NE; Dawes, NE |
| Headline | Severe Thunderstorm Warning issued September 7 at 12:54AM MDT until September 7 at 1:00AM MDT by NWS Cheyenne WY |
| Expires | 2026-09-07T01:03:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
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?
Calamity.live data shows a weather event with CalamityScore 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.