This alert expired on 3 June 2026 at 23:00 UTC. It is kept here as a record.
It is the 19th strongest of the 23 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 1 June 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 3 at 4:23PM MDT until June 3 at 5:00PM MDT by NWS Denver CO
Nearby, since 15 March 2026
- July 2, 2026 · score 43 · 17.9 km
- June 1, 2026 · score 43 · 19.4 km
- June 26, 2026 · score 43 · 20.8 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 | 40.7160, -104.2400 |
| Nearest City | Greeley (52 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-03T22:23:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.0d97f3ff8eed2658f3932a4a1a0805ef5d5c59c7.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Weld, CO |
| Headline | Severe Thunderstorm Warning issued June 3 at 4:23PM MDT until June 3 at 5:00PM MDT by NWS Denver CO |
| Expires | 2026-06-03T17:00:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
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.