This alert expired on 31 August 2026 at 00:15 UTC. It is kept here as a record.
No stronger detection stands among the 15 recorded within 20 km of this point since 11 April 2026 — 9 others scored the same. The last comparable one was on 28 July 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 30 at 5:53PM MDT until August 30 at 6:15PM MDT by NWS Grand Junction CO
An estimated 80,247 people live within 50 km of this point.
Nearby, since 11 April 2026
- July 15, 2026 · score 39 · 7.2 km
- July 18, 2026 · score 39 · 15.6 km
- July 26, 2026 · score 39 · 18.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 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) | 39 / 100 |
| Our confidence | 80% |
| Coordinates | 38.7720, -108.6640 |
| Nearest City | Grand Junction (34 km) |
| Population Exposed | 80.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-30T23:53:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Mesa, CO |
| Headline | Severe Thunderstorm Warning issued August 30 at 5:53PM MDT until August 30 at 6:15PM MDT by NWS Grand Junction CO |
| Expires | 2026-08-30T18:15:00-06:00 |
| SenderName | NWS Grand Junction 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.
Calamity.live data shows a weather event with CalamityScore 39/100, near Grand Junction (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.