Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is in it.
3 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert is in force until 12 September 2026, 22:45 UTC.
It is the 34th strongest of the 112 detections recorded within 20 km of this point since 12 May 2026. Another comparable one was recorded here earlier the same day. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 12 at 12:52PM MST until September 12 at 3:45PM MST by NWS Tucson AZ
An estimated 855,005 people live within 50 km of this point.
Nearby, since 12 May 2026
- September 12, 2026 · score 41 · 0.0 km
- July 12, 2026 · score 48 · 3.1 km
- September 4, 2026 · score 41 · 4.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 41 out of 100, at 79 % 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) | 41 / 100 |
| Our confidence | 79% |
| Coordinates | 32.2526, -111.0796 |
| Nearest City | Flowing Wells (8 km) |
| Population Exposed | 855.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-12T19:52:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.6155d47cefe796668636fd074fdaa194a1a45820.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pima, AZ |
| Headline | Flash Flood Warning issued September 12 at 12:52PM MST until September 12 at 3:45PM MST by NWS Tucson AZ |
| Expires | 2026-09-12T15:45:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6155d47cefe796668636fd074fdaa194a1a45820.001.1","noaa_urn:oid:2.49.0.1.840.0.c6eaf8f576e643f3b8e21555602ed5584196735a.001.1"] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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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