Right now
The most recent data we hold from NOAA arrived 8 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 1 June 2026 at 22:15 UTC. It is kept here as a record.
No stronger detection stands among the 25 recorded within 20 km of this point since 15 March 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: Severe Thunderstorm Warning issued June 1 at 3:51PM MDT until June 1 at 4:15PM MDT by NWS Cheyenne WY
An estimated 130,178 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 2, 2026 · score 43 · 8.2 km
- June 1, 2026 · score 43 · 9.1 km
- June 3, 2026 · score 16 · 10.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 80 % 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 | 80% |
| Coordinates | 40.6207, -104.2648 |
| Nearest City | Greeley (44 km) |
| Population Exposed | 130.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-01T21:51:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.987ad2a8adfd15cac7260005c5b1cecd |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Scotts Bluff, NE; Sioux, NE; Goshen, WY; Laramie, WY; Adams, CO; Washington, CO and 4 more areas |
| Headline | Severe Thunderstorm Warning issued June 1 at 3:51PM MDT until June 1 at 4:15PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-01T16:15:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.987ad2a8adfd15cac7260005c5b1cecde0c574da.001.1","noaa_urn:oid:2.49.0.1.840.0.2c8bfdbb0d356ed33dfff4d9912c4283480262aa.001.1","noaa_urn:oid:2.49.0.1.840.0.e76b28f55b81ceaa72cd2189791d35878fce7be7.001.1","noaa_urn:oid:2.49.0.1.840.0.080dac7e79386934b7637b26f28539205cc0b429.001.1","noaa_urn:oid:2.49.0.1.840.0.206bd35e5dcac3ff960df27b99ee8eecbf061311.001.1","noaa_urn:oid:2.49.0.1.840.0.4c3d81a775d581f65adac3223a93f9d7726e5d34.001.1","noaa_urn:oid:2.49.0.1.840.0.dc50f82632da8cf5dd003d79cba2540890939636.001.1"] |
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.
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