This alert expired on 21 May 2026 at 23:15 UTC. It is kept here as a record.
No stronger detection stands among the 155 recorded within 20 km of this point since 15 March 2026 — 5 others scored the same. The last comparable one was on 19 May 2026. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Snow Squall Warning issued May 21 at 4:22PM MDT until May 21 at 5:15PM MDT by NWS Cheyenne WY
Nearby, since 15 March 2026
- June 23, 2026 · score 22 · 10.7 km
- August 9, 2026 · score 22 · 14.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 64 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 64% |
| Coordinates | 41.6500, -106.4480 |
| Nearest City | Laramie (81 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-21T22:22:00.000Z |
Score Breakdown
Technical Details
| Event | Snow Squall Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Carbon, WY |
| Headline | Snow Squall Warning issued May 21 at 4:22PM MDT until May 21 at 5:15PM MDT by NWS Cheyenne WY |
| Expires | 2026-05-21T17:15:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| Iem TypeSummary | q |
| Iem City | 7 NW Elk Mountain |
| Iem County | Carbon |
| Iem State | WY |
| Iem Wfo | CYS |
| Iem Remark | Visibility under 1/4 mile, temperature of 30 degrees, and wind gust of 37 mph reported at mesonet site. |
| MergedSources | [{"id":"iem_q_41.760_-106.510_1779402240000","source":"iem","severity":"low","severityValue":25,"timestamp":1779402240000,"latitude":41.76,"longitude":-106.51}] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 22/100, near Laramie (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.