Right now
The most recent data we hold from NOAA arrived 8 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 20 September 2026 at 14:15 UTC. It is kept here as a record.
What the source measured
NOAA reported: Flash Flood Warning issued September 20 at 8:51AM EDT until September 20 at 10:15AM EDT by NWS Charleston WV
Urban PEI: 46,838 within a heuristic 50 km radius; not unique people.
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 | 38.4770, -81.3138 |
| Nearest City | Charleston (31 km) |
| Urban exposure index (PEI) | 46.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-20T12:51:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.2d6c865ba0da2de65a629712c42c5679d96519ce.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: 2026-09-20T12:51:00.000Z.
First archived: 2026-09-20T12:53:31.830Z. 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 | Boone, WV; Cabell, WV; Clay, WV; Kanawha, WV; Lincoln, WV; Putnam, WV; Wayne, WV; Braxton, WV; Calhoun, WV; Clay, WV; Gilmer, WV; Lewis, WV; Nicholas, WV; Roane, WV; Webster, WV; Clay, WV; Nicholas, WV; Pocahontas, WV; Randolph, WV; Webster, WV and 1 more areas |
| Headline | Flash Flood Warning issued September 20 at 8:51AM EDT until September 20 at 10:15AM EDT by NWS Charleston WV |
| Expires | 2026-09-20T10:15:00-04:00 |
| SenderName | NWS Charleston WV |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2d6c865ba0da2de65a629712c42c5679d96519ce.001.1","noaa_urn:oid:2.49.0.1.840.0.0e7cdaaf70fe9c8f4a121e460d254430c3896eae.001.1","noaa_urn:oid:2.49.0.1.840.0.519a0ceb905348f4da49ae844449121482306e28.001.1","noaa_urn:oid:2.49.0.1.840.0.5bb93b8c5b73eb2cdfa490c16a41292dc9bc88bd.001.1"] |
| Iem TypeSummary | F |
| Iem City | 5 WSW Gassaway |
| Iem County | Braxton |
| Iem State | WV |
| Iem Wfo | RLX |
| Iem Remark | High water reported in the 500 block of Wilsie Rd. |
| MergedSources | [{"id":"iem_F_39.020_-81.480_1789898100000","source":"iem","severity":"low","severityValue":25,"timestamp":1789898100000,"latitude":39.02,"longitude":-81.48},{"id":"iem_F_38.910_-81.700_1789900200000","source":"iem","severity":"low","severityValue":25,"timestamp":1789900200000,"latitude":38.91,"longitude":-81.7},{"id":"iem_F_38.980_-81.590_1789903800000","source":"iem","severity":"low","severityValue":25,"timestamp":1789903800000,"latitude":38.98,"longitude":-81.59},{"id":"iem_F_38.890_-81.250_1789906500000","source":"iem","severity":"low","severityValue":25,"timestamp":1789906500000,"latitude":38.89,"longitude":-81.25},{"id":"iem_x_39.020_-81.420_1789896600000","source":"iem","severity":"low","severityValue":25,"timestamp":1789896600000,"latitude":39.02,"longitude":-81.42},{"id":"iem_F_38.650_-80.860_1789899600000","source":"iem","severity":"low","severityValue":25,"timestamp":1789899600000,"latitude":38.65,"longitude":-80.86}] |
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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