Right now
The most recent data we hold from NOAA arrived 37 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 05:45 UTC. It is kept here as a record.
It is the 14th strongest of the 80 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 10:42PM EDT until September 13 at 1:45AM EDT by NWS Blacksburg VA
Urban PEI: 17,056 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- August 7, 2026 · score 34 · 16.2 km
- August 11, 2026 · score 39 · 20.0 km
- July 22, 2026 · score 63 · 20.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 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) | 28 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 37.8745, -81.1678 |
| Nearest City | Beckley (11 km) |
| Urban exposure index (PEI) | 17.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-13T02:42:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.d46fe17d384718acc4d6356f3c1775c79fe799d3.001.1 |
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: 2026-09-13T02:42:00.000Z.
First archived: 2026-09-13T02:48:08.107Z. 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 | Roanoke, VA; Buchanan, VA; Logan, WV; McDowell, WV; Mingo, WV; Wyoming, WV; Buchanan, VA and 2 more areas |
| Headline | Flash Flood Warning issued September 12 at 10:42PM EDT until September 13 at 1:45AM EDT by NWS Blacksburg VA |
| Expires | 2026-09-13T01:45:00-04:00 |
| SenderName | NWS Blacksburg VA |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d46fe17d384718acc4d6356f3c1775c79fe799d3.001.1","noaa_urn:oid:2.49.0.1.840.0.247a1bdb6a8f29541231dffec9e0cf870e7ff155.001.1","noaa_urn:oid:2.49.0.1.840.0.17dcb0d0ebfdb0b1e7f521ccf7e95d42e0f328aa.002.1","noaa_urn:oid:2.49.0.1.840.0.6f462de86e7745b1fcc8fe84f6c060b8c043931d.001.1","noaa_urn:oid:2.49.0.1.840.0.89dd78c5ce91c45faf6ff23ddda0beed7ba8520d.001.1"] |
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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