This alert expired on 30 May 2026 at 23:15 UTC. It is kept here as a record.
No stronger detection stands among the 59 recorded within 20 km of this point since 6 May 2026 — 15 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued May 30 at 4:53PM MDT until May 30 at 5:15PM MDT by NWS Cheyenne WY
Nearby, since 6 May 2026
- July 23, 2026 · score 22 · 8.9 km
- June 24, 2026 · score 46 · 13.0 km
- August 10, 2026 · score 22 · 17.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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 | Critical |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 60% |
| Coordinates | 40.7480, -103.0060 |
| Nearest City | Evans (148 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-30T22:53:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.a83a556919eec611306561d2ea53a930 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kimball, NE; Yuma, CO |
| Headline | Tornado Warning issued May 30 at 4:53PM MDT until May 30 at 5:15PM MDT by NWS Cheyenne WY |
| Expires | 2026-05-30T17:15:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a83a556919eec611306561d2ea53a930d203b434.001.1","noaa_urn:oid:2.49.0.1.840.0.5ac6ee5ff47b0b9d6c096f829286aebe4cb8acf7.001.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 46/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.