Right now
The most recent data we hold from NOAA arrived 3 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
8 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 13 September 2026 at 00:30 UTC. It is kept here as a record.
It is the 24th strongest of the 50 detections recorded within 20 km of this point since 14 June 2026. Another comparable one was recorded here earlier the same day. 19 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 12 at 3:43PM MST until September 12 at 5:30PM MST by NWS Tucson AZ
An estimated 351,094 people live within 50 km of this point.
Nearby, since 14 June 2026
- September 12, 2026 · score 37 · 0.0 km
- September 11, 2026 · score 37 · 5.6 km
- September 11, 2026 · score 37 · 8.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 37 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) | 37 / 100 |
| Our confidence | 86% |
| Coordinates | 31.6713, -110.9932 |
| Nearest City | Green Valley (20 km) |
| Population Exposed | 351.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-12T22:43:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.7e7db8bff901bbb9fdfbfa32ece3102c91e5d598.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Pima, AZ; Santa Cruz, AZ |
| Headline | Flash Flood Warning issued September 12 at 3:43PM MST until September 12 at 5:30PM MST by NWS Tucson AZ |
| Expires | 2026-09-12T17:30:00-07:00 |
| SenderName | NWS Tucson AZ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7e7db8bff901bbb9fdfbfa32ece3102c91e5d598.001.1","noaa_urn:oid:2.49.0.1.840.0.e6a33781c06702fec366bc1a6b4f1f7a1341aa54.001.1"] |
| 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_32.160_-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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