Reported by SPC 170 days ago.
No stronger detection stands among the 158 recorded within 20 km of this point since 12 March 2026 — one other scored the same. The last comparable one was on 12 March 2026. One more was recorded here in the fortnight before it.
What the source measured
SPC reported: Wind 79 kt near 4 NE Nederland, Boulder, CO. (BOU)
An estimated 1,742,955 people live within 50 km of this point.
Nearby, since 12 March 2026
- May 5, 2026 · score 52 · 0.0 km
- March 12, 2026 · score 58 · 0.0 km
- June 22, 2026 · score 52 · 9.1 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 59 % 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 | 59% |
| Coordinates | 39.9900, -105.4500 |
| Nearest City | Boulder (15 km) |
| Population Exposed | 1.7M within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-03-13T09:14:58.877Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 79 |
| Location | 4 NE Nederland |
| County | Boulder |
| 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.
Calamity.live data shows a weather event with CalamityScore 58/100, near Boulder (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.