Right now
The most recent data we hold from NOAA arrived 9 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
12 other detections within 20 km in the last 24 hours, the nearest 5 km from here.
This alert expired on 5 September 2026 at 23:30 UTC. It is kept here as a record.
It is the 23rd strongest of the 63 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 5 at 4:57PM MDT until September 5 at 5:30PM MDT by NWS Cheyenne WY
Nearby, since 5 May 2026
- July 4, 2026 · score 22 · 13.6 km
- September 5, 2026 · score 28 · 13.9 km
- July 2, 2026 · score 22 · 19.8 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 | 41.3424, -102.9890 |
| Nearest City | Cheyenne (155 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-05T22:57:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.1c3724c85d537c47995f0e1a2caf499521bc9fae.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Box Butte, NE; Morrill, NE; Logan, CO |
| Headline | Severe Thunderstorm Warning issued September 5 at 4:57PM MDT until September 5 at 5:30PM MDT by NWS Cheyenne WY |
| Expires | 2026-09-05T17:30:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1c3724c85d537c47995f0e1a2caf499521bc9fae.001.1","noaa_urn:oid:2.49.0.1.840.0.1729356437e1bde56fcb66d5b4be03c216aefb70.001.1","noaa_urn:oid:2.49.0.1.840.0.0dff07ace0bcbf0f620276f59d9f8459acf6fac6.001.1","noaa_urn:oid:2.49.0.1.840.0.3c27830fe15b04ac2a6e2c4d127a33437cd1641f.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.
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.