This alert expired on 13 July 2026 at 00:15 UTC. It is kept here as a record.
It is the 7th strongest of the 37 detections recorded within 20 km of this point since 14 June 2026. 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 July 12 at 4:30PM MST until July 12 at 5:15PM MST by NWS Tucson AZ
An estimated 770,448 people live within 50 km of this point.
Nearby, since 14 June 2026
- August 10, 2026 · score 48 · 3.5 km
- August 29, 2026 · score 54 · 5.6 km
- August 30, 2026 · score 54 · 7.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 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) | 48 / 100 |
| Our confidence | 80% |
| Coordinates | 31.8825, -111.0972 |
| Nearest City | Green Valley (11 km) |
| Population Exposed | 770.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-12T23:30:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Pima, AZ; Pima, AZ; Santa Cruz, AZ |
| Headline | Severe Thunderstorm Warning issued July 12 at 4:30PM MST until July 12 at 5:15PM MST by NWS Tucson AZ |
| Expires | 2026-07-12T17:15:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.57c62e7cdc69eb8c04a6d218c685028c1bf427f9.001.1","noaa_urn:oid:2.49.0.1.840.0.47b977297bdafbc6054537e28efa4f4ad745d445.001.1","noaa_urn:oid:2.49.0.1.840.0.f4283a7707dfd48b983abd0cc91a068dfb263cd7.001.1","noaa_urn:oid:2.49.0.1.840.0.d4c6b63b479a70702ac4676a3eeccec3ac69404e.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 48/100, near Green Valley (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.