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.
5 other detections within 20 km in the last 24 hours, the nearest 21 km from here.
This alert expired on 30 May 2026 at 01:45 UTC. It is kept here as a record.
It is the 9th strongest of the 72 detections recorded within 20 km of this point since 5 May 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 29 at 7:35PM MDT until May 29 at 7:45PM MDT by NWS Cheyenne WY
Nearby, since 5 May 2026
- June 22, 2026 · score 46 · 16.6 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 68 % 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 | 68% |
| Coordinates | 41.1860, -103.3960 |
| Nearest City | Cheyenne (119 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-30T01:35:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5c920195b8f52fb5d56bcfb7ff01aada36b483f7.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cheyenne, NE; Kimball, NE |
| Headline | Severe Thunderstorm Warning issued May 29 at 7:35PM MDT until May 29 at 7:45PM MDT by NWS Cheyenne WY |
| Expires | 2026-05-29T19:45:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 9 NE Harrisburg |
| Iem County | Banner |
| Iem State | NE |
| Iem Wfo | CYS |
| Iem Remark | Storm Chaser reported a few quarter-sized hail stones around 6PM. |
| MergedSources | [{"id":"iem_H_41.430_-103.960_1780093920000","source":"iem","severity":"low","severityValue":25,"timestamp":1780093920000,"latitude":41.43,"longitude":-103.96},{"id":"iem_H_41.640_-103.630_1780099380000","source":"iem","severity":"low","severityValue":25,"timestamp":1780099380000,"latitude":41.64,"longitude":-103.63}] |
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.