This alert expired on 26 June 2026 at 00:45 UTC. It is kept here as a record.
No stronger detection stands among the 66 recorded within 20 km of this point since 3 April 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 25 at 6:22PM MDT until June 25 at 6:45PM MDT by NWS Cheyenne WY
An estimated 236,056 people live within 50 km of this point.
Nearby, since 3 April 2026
- July 9, 2026 · score 39 · 17.4 km
- August 12, 2026 · score 39 · 18.7 km
- July 30, 2026 · score 39 · 19.6 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 88 % 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) | 43 / 100 |
| Our confidence | 88% |
| Coordinates | 40.9298, -104.7025 |
| Nearest City | Cheyenne (25 km) |
| Population Exposed | 236.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-26T00:22:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.b930a71b133bf7a90724dd1ebb065e35 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Laramie, WY; Larimer, CO; Weld, CO |
| Headline | Severe Thunderstorm Warning issued June 25 at 6:22PM MDT until June 25 at 6:45PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-25T18:45:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b930a71b133bf7a90724dd1ebb065e35fd6b9b66.001.1","noaa_urn:oid:2.49.0.1.840.0.dfe439682109e84a6698c11043f17694b96c2346.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 70 |
| Iem Unit | MPH |
| Iem City | 4 NNW Vedauwoo |
| Iem County | Albany |
| Iem State | WY |
| Iem Wfo | CYS |
| MergedSources | [{"id":"iem_G_41.050_-104.890_1782432180000","source":"iem","severity":"low","severityValue":25,"timestamp":1782432180000,"latitude":41.05,"longitude":-104.89},{"id":"iem_H_41.270_-105.100_1782430740000","source":"iem","severity":"low","severityValue":25,"timestamp":1782430740000,"latitude":41.27,"longitude":-105.1},{"id":"iem_G_41.200_-105.430_1782429600000","source":"iem","severity":"low","severityValue":25,"timestamp":1782429600000,"latitude":41.2,"longitude":-105.43}] |
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 near Cheyenne?
Calamity.live data shows a weather event with CalamityScore 43/100, near Cheyenne (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.