Right now
The most recent data we hold from NOAA arrived 11 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 24 September 2026 at 02:45 UTC. It is kept here as a record.
It is one of only 4 we have recorded within 20 km of this point since 25 May 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 23 at 5:15PM MST until September 23 at 7:45PM MST by NWS Flagstaff AZ
Urban PEI: 21,700 within a heuristic 50 km radius; not unique people.
Nearby, since 25 May 2026
- September 24, 2026 · score 28 · 0.0 km
- September 23, 2026 · score 28 · 0.0 km
- July 22, 2026 · 0.8 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 28 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 34.1343, -112.1021 |
| Nearest City | Anthem (30 km) |
| Urban exposure index (PEI) | 21.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-24T00:15:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.05602e7b0062381388e6484fcf54de102c6cfdba.001.1 |
Physical priority index · v5. 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: 2026-09-24T00:15:00.000Z.
First archived: 2026-09-24T00:22:48.101Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-24T00:54:54.917Z · data_change
Index 28 → 28; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Yavapai, AZ |
| Headline | Flash Flood Warning issued September 23 at 5:15PM MST until September 23 at 7:45PM MST by NWS Flagstaff AZ |
| Expires | 2026-09-23T19:45:00-07:00 |
| SenderName | NWS Flagstaff AZ |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.7 |
| Iem Unit | Inch |
| Iem City | 5 SSE Village at Oak Cr |
| Iem County | Yavapai |
| Iem State | AZ |
| Iem Wfo | FGZ |
| MergedSources | [{"id":"iem_F_34.070_-112.150_1790208600000","source":"iem","severity":"low","severityValue":25,"timestamp":1790208600000,"latitude":34.07,"longitude":-112.15},{"id":"iem_H_34.520_-112.500_1790187660000","source":"iem","severity":"low","severityValue":25,"timestamp":1790187660000,"latitude":34.52,"longitude":-112.5},{"id":"iem_H_34.720_-111.720_1790204040000","source":"iem","severity":"low","severityValue":25,"timestamp":1790204040000,"latitude":34.72,"longitude":-111.72}] |
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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