This alert expired on 11 August 2026 at 23:15 UTC. It is kept here as a record.
No stronger detection stands among the 8 recorded within 20 km of this point since 11 August 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 11 at 3:30PM PDT until August 11 at 4:15PM PDT by NWS San Diego CA
An estimated 224,513 people live within 50 km of this point.
Nearby, since 11 August 2026
- August 13, 2026 · score 43 · 6.1 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 | 33.5789, -115.8970 |
| Nearest City | Coachella (28 km) |
| Population Exposed | 224.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-11T22:30:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | San Diego, CA; Riverside, CA; San Bernardino, CA |
| Headline | Severe Thunderstorm Warning issued August 11 at 3:30PM PDT until August 11 at 4:15PM PDT by NWS San Diego CA |
| Expires | 2026-08-11T16:15:00-07:00 |
| SenderName | NWS San Diego CA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.413a5984731ee1153446396a17ea5a9d5bfe0b2b.001.1","noaa_urn:oid:2.49.0.1.840.0.ed1b27d728016969c77ffe75615f50ea0a4d4cbf.001.1"] |
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 43/100, near Coachella (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.