This alert expired on 28 August 2026 at 06:30 UTC. It is kept here as a record.
It is the strongest of the 23 detections recorded within 20 km of this point since 23 March 2026. The last comparable one was on 12 August 2026.
What the source measured
NOAA reported: Flash Flood Warning issued August 27 at 11:24PM EDT until August 28 at 2:30AM EDT by NWS Blacksburg VA
An estimated 25,432 people live within 50 km of this point.
Nearby, since 23 March 2026
- June 22, 2026 · score 22 · 9.1 km
- May 27, 2026 · score 22 · 12.6 km
- July 28, 2026 · score 22 · 21.7 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 86 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. 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 |
| Our confidence | 86% |
| Coordinates | 37.6712, -80.2762 |
| Nearest City | Salem (47 km) |
| Population Exposed | 25.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-28T03:24:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.58d1e45b85b3e4994221b5b3aaca8974 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Alleghany, VA; Bath, VA; Giles, VA; Mercer, WV; Monroe, WV; Summers, WV |
| Headline | Flash Flood Warning issued August 27 at 11:24PM EDT until August 28 at 2:30AM EDT by NWS Blacksburg VA |
| Expires | 2026-08-28T02:30:00-04:00 |
| SenderName | NWS Blacksburg VA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.58d1e45b85b3e4994221b5b3aaca897458da8bcf.001.1","noaa_urn:oid:2.49.0.1.840.0.fa7fd3e60c22f0430f3f840c42c011ba45764e0b.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 2 SW Union |
| Spc County | Monroe |
| Spc State | WV |
| Spc Comments | A couple trees down near Garys Garage. (RNK) |
| MergedSources | [{"id":"spc_wind_37.57_-80.56_188","source":"spc","severity":"medium","severityValue":45,"timestamp":1787887800000,"latitude":37.57,"longitude":-80.56}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 28/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.