This alert expired on 26 June 2026 at 21:00 UTC. It is kept here as a record.
It is the 10th strongest of the 55 detections recorded within 20 km of this point since 15 March 2026. 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 26 at 2:28PM MDT until June 26 at 3:00PM MDT by NWS Denver CO
An estimated 394,797 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 16, 2026 · score 52 · 13.9 km
- July 28, 2026 · score 52 · 17.9 km
- June 3, 2026 · score 46 · 19.1 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.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 39.3083, -104.5483 |
| Nearest City | Castle Rock (28 km) |
| Population Exposed | 394.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-26T20:28:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.40e81a5dac28380e6d2aa1057c8283c3d6426142.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Douglas, CO; Elbert, CO |
| Headline | Severe Thunderstorm Warning issued June 26 at 2:28PM MDT until June 26 at 3:00PM MDT by NWS Denver CO |
| Expires | 2026-06-26T15:00:00-06:00 |
| 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 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.
Want to know when something happens near Castle Rock?
Calamity.live data shows a weather event with CalamityScore 43/100, near Castle Rock (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.