Right now
The most recent data we hold from NOAA arrived 69 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
This alert expired on 16 September 2026 at 04:15 UTC. It is kept here as a record.
What the source measured
NOAA reported: Flash Flood Warning issued September 15 at 7:57PM MST until September 15 at 9:15PM MST by NWS Flagstaff AZ
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 16 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) | 16 / 100 |
| Legacy data-support index | 0.66/1 |
| Coordinates | 33.5087, -109.7620 |
| Nearest City | Florence (160 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-16T02:57:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.ebba8b5fd2116d78b10213d47471c92464ee0529.001.1 |
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: 2026-09-16T02:57:00.000Z.
First archived: 2026-09-16T03:02:06.932Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-16T03:34:28.240Z · data_change
Index 16 → 16; severity medium → medium; version 5 → 5.
2026-09-16T03:29:06.567Z · data_change
Index 16 → 16; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Apache, AZ |
| Headline | Flash Flood Warning issued September 15 at 7:57PM MST until September 15 at 9:15PM MST by NWS Flagstaff AZ |
| Expires | 2026-09-15T21:15:00-07:00 |
| SenderName | NWS Flagstaff AZ |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | 1 E Fort Apache |
| Iem County | Navajo |
| Iem State | AZ |
| Iem Wfo | FGZ |
| Iem Remark | Photos of flooding across Ft. Apache Road at Stago Rd. intersection via social media. |
| MergedSources | [{"id":"iem_F_33.790_-109.960_1789515480000","source":"iem","severity":"low","severityValue":25,"timestamp":1789515480000,"latitude":33.79,"longitude":-109.96}] |
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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