This alert expired on 12 August 2026 at 23:45 UTC. It is kept here as a record.
It is the 5th strongest of the 20 detections recorded within 20 km of this point since 18 July 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 12 at 4:24PM PDT until August 12 at 4:45PM PDT by NWS Las Vegas NV
An estimated 92,998 people live within 50 km of this point.
Nearby, since 18 July 2026
- July 18, 2026 · score 43 · 12.1 km
- July 18, 2026 · score 39 · 22.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 82 % 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 | 82% |
| Coordinates | 34.7650, -114.3583 |
| Nearest City | Lake Havasu City (32 km) |
| Population Exposed | 93.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-12T23:24:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5fe395e95b8902818eefbb19516ef667b8048981.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Mohave, AZ; San Bernardino, CA |
| Headline | Severe Thunderstorm Warning issued August 12 at 4:24PM PDT until August 12 at 4:45PM PDT by NWS Las Vegas NV |
| Expires | 2026-08-12T16:45:00-07:00 |
| SenderName | NWS Las Vegas NV |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 61 |
| Iem Unit | MPH |
| Iem City | 1 N Desert Hills |
| Iem County | Mohave |
| Iem State | AZ |
| Iem Wfo | VEF |
| Iem Remark | AWOS station KHII Lake Havasu City Airport. |
| MergedSources | [{"id":"iem_G_34.570_-114.370_1786576500000","source":"iem","severity":"low","severityValue":25,"timestamp":1786576500000,"latitude":34.57,"longitude":-114.37}] |
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 Lake Havasu City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.