Severe weather in United States
This alert expired on 12 August 2026 at 02:51 UTC. It is kept here as a record.
It is the 3rd strongest of the 11 detections recorded within 20 km of this point since 18 May 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 11 at 7:41PM PDT until August 11 at 7:45PM PDT by NWS Las Vegas NV
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 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 | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 59% |
| Coordinates | 34.6620, -115.7760 |
| Nearest City | Twentynine Palms (63 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-12T02:41:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.1faed028b5e0f7bdd799345d9b0ea0778fdc1e2e.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | San Bernardino, CA |
| Headline | Severe Thunderstorm Warning issued August 11 at 7:41PM PDT until August 11 at 7:45PM PDT by NWS Las Vegas NV |
| Expires | 2026-08-11T19:51:00-07:00 |
| SenderName | NWS Las Vegas NV |
| 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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.