This alert expired on 10 July 2026 at 22:05 UTC. It is kept here as a record.
It is the 3rd strongest of the 31 detections recorded within 20 km of this point since 6 May 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 10 at 3:55PM MDT until July 10 at 4:00PM MDT by NWS Denver CO
An estimated 121,302 people live within 50 km of this point.
Nearby, since 6 May 2026
- July 10, 2026 · score 34 · 16.5 km
- June 8, 2026 · score 67 · 17.6 km
- June 26, 2026 · score 43 · 20.3 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 | 39.1933, -104.3650 |
| Nearest City | Castle Rock (47 km) |
| Population Exposed | 121.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-10T21:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.3a4c0939096eb89d05884417780cfab34e57c01c.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Elbert, CO |
| Headline | Severe Thunderstorm Warning issued July 10 at 3:55PM MDT until July 10 at 4:00PM MDT by NWS Denver CO |
| Expires | 2026-07-10T16:05:00-06:00 |
| 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 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.