Reported by SPC 5 days ago.
It is the strongest of the 206 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 26 August 2026.
What the source measured
SPC reported: Hail 100 in near 1 ESE Castle Pines, Douglas, CO. (BOU)
An estimated 2,299,826 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 26, 2026 · score 52 · 0.0 km
- July 28, 2026 · score 52 · 9.3 km
- June 1, 2026 · score 52 · 10.6 km
How we know
One source: SPC. Not yet confirmed by a second, independent source.
Our own score for this event is 58 out of 100, at 63 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | high |
| Calamity Score (ours) | 58 / 100 |
| Our confidence | 63% |
| Coordinates | 39.4600, -104.8600 |
| Nearest City | Castle Rock (10 km) |
| Population Exposed | 2.3M within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-08-27T12:10:53.506Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | hail |
| Speed | 100 |
| Location | 1 ESE Castle Pines |
| County | Douglas |
| State | CO |
| Comments | (BOU) |
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 58/100, near Castle Rock (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.