Right now
The most recent data we hold from NOAA arrived 83 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 13 September 2026 at 00:37 UTC. It is kept here as a record.
It is the 41st strongest of the 52 detections recorded within 20 km of this point since 14 June 2026. The last comparable one was on 12 September 2026. 27 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 12 at 5:27PM MST until September 12 at 5:30PM MST by NWS Tucson AZ
An estimated 93,809 people live within 50 km of this point.
Nearby, since 14 June 2026
- June 14, 2026 · score 43 · 6.1 km
- September 11, 2026 · score 37 · 12.5 km
- July 12, 2026 · score 48 · 13.3 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 32 out of 100, at 86 % 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) | 32 / 100 |
| Our confidence | 86% |
| Coordinates | 31.7687, -111.1393 |
| Nearest City | Green Valley (17 km) |
| Population Exposed | 93.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-13T00:27:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.17e2861c6f25f4d69d7d7794eb9d59a7ff4beb45.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pima, AZ |
| Headline | Flash Flood Warning issued September 12 at 5:27PM MST until September 12 at 5:30PM MST by NWS Tucson AZ |
| Expires | 2026-09-12T17:37:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | 2 S Picture Rocks |
| Iem County | Pima |
| Iem State | AZ |
| Iem Wfo | TWC |
| Iem Remark | Swift water rescue on W Rudasill rd and N Chaparral Rd. |
| MergedSources | [{"id":"iem_F_32.370_-111.010_1789250520000","source":"iem","severity":"low","severityValue":25,"timestamp":1789250520000,"latitude":32.37,"longitude":-111.01},{"id":"iem_F_32.160_-111.170_1789251000000","source":"iem","severity":"low","severityValue":25,"timestamp":1789251000000,"latitude":32.16,"longitude":-111.17},{"id":"iem_F_32.030_-110.720_1789245960000","source":"iem","severity":"low","severityValue":25,"timestamp":1789245960000,"latitude":32.03,"longitude":-110.72},{"id":"iem_F_32.290_-111.220_1789243620000","source":"iem","severity":"low","severityValue":25,"timestamp":1789243620000,"latitude":32.29,"longitude":-111.22},{"id":"iem_F_32.030_-110.720_1789247940000","source":"iem","severity":"low","severityValue":25,"timestamp":1789247940000,"latitude":32.03,"longitude":-110.72},{"id":"iem_F_32.310_-111.240_1789242900000","source":"iem","severity":"low","severityValue":25,"timestamp":1789242900000,"latitude":32.31,"longitude":-111.24}] |
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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