Right now
The most recent data we hold from NOAA arrived 2 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 02:15 UTC. It is kept here as a record.
It is the 12th strongest of the 21 detections recorded within 20 km of this point since 12 July 2026. The last comparable one was on 30 August 2026. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 12 at 4:14PM MST until September 12 at 7:15PM MST by NWS Flagstaff AZ
Urban PEI: 140,944 within a heuristic 50 km radius; not unique people.
Nearby, since 12 July 2026
- July 13, 2026 · score 43 · 10.7 km
- July 17, 2026 · score 37 · 11.8 km
- July 12, 2026 · score 43 · 12.8 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 37 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.87/1 |
| Coordinates | 32.8044, -111.2452 |
| Nearest City | Florence (28 km) |
| Urban exposure index (PEI) | 140.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-12T23:14:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.aec7ee4add131b422945b163149c8baa23f331e9.001.1 |
Physical priority index · v4 (historical). Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-09-12T23:14:00.000Z.
First archived: 2026-09-12T23:20:31.352Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Yavapai, AZ; Gila, AZ; Pima, AZ and 1 more areas |
| Headline | Flash Flood Warning issued September 12 at 4:14PM MST until September 12 at 7:15PM MST by NWS Flagstaff AZ |
| Expires | 2026-09-12T19:15:00-07:00 |
| SenderName | NWS Flagstaff AZ |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.aec7ee4add131b422945b163149c8baa23f331e9.001.1","noaa_urn:oid:2.49.0.1.840.0.6fbe7651ed2ae58553c566300c89ed776917dcc8.001.1","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_32.370_-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_32.290_-111.220_1789243620000","source":"iem","severity":"low","severityValue":25,"timestamp":1789243620000,"latitude":32.29,"longitude":-111.22},{"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.
Review the area, threshold and delivery channel in your account.
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