Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is in it.
One other detection within 20 km in the last 24 hours, 15 km from here.
This alert is in force until 11 September 2026, 23:30 UTC.
It is the 29th strongest of the 47 detections recorded within 20 km of this point since 14 June 2026. Another comparable one was recorded here earlier the same day. 22 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 11 at 3:39PM MST until September 11 at 4:30PM MST by NWS Tucson AZ
An estimated 378,843 people live within 50 km of this point.
Nearby, since 14 June 2026
- June 14, 2026 · score 43 · 6.6 km
- July 25, 2026 · score 37 · 13.8 km
- August 28, 2026 · score 49 · 14.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 80% |
| Coordinates | 31.7143, -111.0236 |
| Nearest City | Green Valley (15 km) |
| Population Exposed | 378.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-11T22:39:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.7d2d138593f404d7279a17f207c2b27a9a7b8b73.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Pima, AZ; Santa Cruz, AZ; Santa Cruz, AZ |
| Headline | Severe Thunderstorm Warning issued September 11 at 3:39PM MST until September 11 at 4:30PM MST by NWS Tucson AZ |
| Expires | 2026-09-11T16:30:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7d2d138593f404d7279a17f207c2b27a9a7b8b73.001.1","noaa_urn:oid:2.49.0.1.840.0.c6067c7e8def6687696cd54166894a9f75c36eff.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 8 March 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.
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