This alert expired on 4 June 2026 at 00:30 UTC. It is kept here as a record.
It is the 23rd strongest of the 50 detections recorded within 20 km of this point since 28 April 2026. The last comparable one was on 30 May 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 3 at 5:41PM MDT until June 3 at 6:30PM MDT by NWS Cheyenne WY
Nearby, since 28 April 2026
- June 21, 2026 · score 46 · 10.4 km
- May 9, 2026 · score 22 · 20.5 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 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) | 16 / 100 |
| Our confidence | 61% |
| Coordinates | 40.8868, -103.8920 |
| Nearest City | Cheyenne (83 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-03T23:41:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.84422b3b6f61b22db2283b8c6b2b0290 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kimball, NE; Laramie, WY; Morgan, CO; Weld, CO |
| Headline | Severe Thunderstorm Warning issued June 3 at 5:41PM MDT until June 3 at 6:30PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-03T18:30:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.84422b3b6f61b22db2283b8c6b2b02901b4e1e30.001.1","noaa_urn:oid:2.49.0.1.840.0.8cc1a024b724abc1c69e3e1531f8fb4717397e18.001.1"] |
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.