Right now
The most recent data we hold from NOAA arrived 33 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 01:30 UTC. It is kept here as a record.
It is the 19th strongest of the 65 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 5 September 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued September 12 at 7:39PM EDT until September 12 at 9:30PM EDT by NWS Charleston WV
Urban PEI: 63,894 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- March 16, 2026 · score 39 · 2.5 km
- July 12, 2026 · score 39 · 7.6 km
- July 22, 2026 · score 63 · 9.1 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 32 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) | 32 / 100 |
| Legacy data-support index | 0.86/1 |
| Coordinates | 38.0755, -81.1999 |
| Nearest City | Beckley (33 km) |
| Urban exposure index (PEI) | 63.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-12T23:39:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.7468b620045a10a3b3cce0453735b0de2a2ce9c1.001.1 |
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: 2026-09-12T23:39:00.000Z.
First archived: 2026-09-12T23:42:04.025Z. 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 | Braxton, WV; Buchanan, VA; McDowell, WV |
| Headline | Flash Flood Warning issued September 12 at 7:39PM EDT until September 12 at 9:30PM EDT by NWS Charleston WV |
| Expires | 2026-09-12T21:30:00-04:00 |
| SenderName | NWS Charleston WV |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7468b620045a10a3b3cce0453735b0de2a2ce9c1.001.1","noaa_urn:oid:2.49.0.1.840.0.ce59729ae001218f9e233149799c7c1d6ad92a35.001.1"] |
| Iem TypeSummary | F |
| Iem City | 7 SE Clendenin |
| Iem County | Clay |
| Iem State | WV |
| Iem Wfo | RLX |
| Iem Remark | Water over Falling Rock Rd. Video provided. |
| MergedSources | [{"id":"iem_F_38.460_-81.240_1789249200000","source":"iem","severity":"low","severityValue":25,"timestamp":1789249200000,"latitude":38.46,"longitude":-81.24},{"id":"iem_F_38.450_-81.230_1789248600000","source":"iem","severity":"low","severityValue":25,"timestamp":1789248600000,"latitude":38.45,"longitude":-81.23},{"id":"iem_F_38.410_-81.260_1789249500000","source":"iem","severity":"low","severityValue":25,"timestamp":1789249500000,"latitude":38.41,"longitude":-81.26}] |
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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