This alert expired on 28 August 2026 at 01:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 83 detections recorded within 20 km of this point since 15 June 2026. The last comparable one was on 28 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 27 at 6:05PM MST until August 27 at 6:45PM MST by NWS Tucson AZ
An estimated 833,614 people live within 50 km of this point.
Nearby, since 15 June 2026
- August 10, 2026 · score 48 · 2.9 km
- July 17, 2026 · score 41 · 4.5 km
- August 28, 2026 · score 48 · 8.4 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 48 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Weather |
| Severity | medium |
| Severity Value | 50 |
| Calamity Score | 48 / 100 |
| Confidence | 90% |
| Coordinates | 32.3638, -110.9123 |
| Nearest City | Oro Valley (6 km) |
| Population Exposed | 833.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-28T01:05:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Pima, AZ; Pinal, AZ |
| Headline | Severe Thunderstorm Warning issued August 27 at 6:05PM MST until August 27 at 6:45PM MST by NWS Tucson AZ |
| Expires | 2026-08-27T18:45:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e1bc306e3e1b40826fdf009152bce777d79bec5a.001.1","noaa_urn:oid:2.49.0.1.840.0.fd7a7316f82c1aa7b807454ebe15ed60a9d1e250.001.1","noaa_urn:oid:2.49.0.1.840.0.660fd4a720748987063472b79d84255a9223fdc3.001.1"] |
| Spc ReportType | wind |
| Spc Speed | 64 |
| Spc Location | 6 SW Tucson |
| Spc County | Pima |
| Spc State | AZ |
| Spc Comments | ASOS station KTUS Tucson International Airport. (TWC) |
| Iem TypeSummary | G |
| Iem Magnitude | 64 |
| Iem Unit | MPH |
| Iem City | 6 SW Tucson |
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 Oro Valley (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 196 scientific monitoring sources.