This alert expired on 25 June 2026 at 03:00 UTC. It is kept here as a record.
No stronger detection stands among the 22 recorded within 20 km of this point since 6 May 2026 — 9 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 24 at 8:49PM MDT until June 24 at 9:00PM MDT by NWS Denver CO
An estimated 463,167 people live within 50 km of this point.
Nearby, since 6 May 2026
- July 22, 2026 · score 43 · 18.9 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 89 % 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 | 89% |
| Coordinates | 40.7051, -104.7312 |
| Nearest City | Windsor (29 km) |
| Population Exposed | 463.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-25T02:49:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.749ff214428f251d370aedfcba61a189 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Morgan, CO; Douglas, CO; Laramie, WY and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 24 at 8:49PM MDT until June 24 at 9:00PM MDT by NWS Denver CO |
| Expires | 2026-06-24T21:00:00-06:00 |
| SenderName | NWS Denver CO |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.749ff214428f251d370aedfcba61a189a20aa0b1.001.1","noaa_urn:oid:2.49.0.1.840.0.425a18d835ced6799f12c503a8930b552330ba3b.001.1","noaa_urn:oid:2.49.0.1.840.0.e6eeadca21dac95f7446b5fb703e7e273640f37b.001.1","noaa_urn:oid:2.49.0.1.840.0.81796760b1ca73d1fb79ad6758ab09aec887adba.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.5 |
| Iem Unit | Inch |
| Iem City | 1 NNW Berthoud |
| Iem County | Larimer |
| Iem State | CO |
| Iem Wfo | BOU |
| MergedSources | [{"id":"iem_H_41.170_-104.520_1782354120000","source":"iem","severity":"low","severityValue":25,"timestamp":1782354120000,"latitude":41.17,"longitude":-104.52},{"id":"iem_H_40.300_-105.070_1782352320000","source":"iem","severity":"low","severityValue":25,"timestamp":1782352320000,"latitude":40.3,"longitude":-105.07},{"id":"iem_H_40.310_-105.100_1782352020000","source":"iem","severity":"low","severityValue":25,"timestamp":1782352020000,"latitude":40.31,"longitude":-105.1},{"id":"iem_H_40.320_-105.090_1782352020000","source":"iem","severity":"low","severityValue":25,"timestamp":1782352020000,"latitude":40.32,"longitude":-105.09}] |
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 Windsor?
Calamity.live data shows a weather event with CalamityScore 43/100, near Windsor (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.