This alert expired on 5 August 2026 at 05:30 UTC. It is kept here as a record.
It is the 39th strongest of the 120 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 28 July 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 4 at 10:49PM EDT until August 5 at 1:30AM EDT by NWS Blacksburg VA
An estimated 19,844 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 9, 2026 · score 22 · 9.9 km
- June 22, 2026 · score 22 · 15.8 km
- June 18, 2026 · score 43 · 16.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 81 % 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) | 34 / 100 |
| Our confidence | 81% |
| Coordinates | 36.2536, -80.8109 |
| Nearest City | Clemmons (47 km) |
| Population Exposed | 19.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-05T02:49:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.bb00761590ef84f02a62e8df9de01615 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Bland, VA; Wythe, VA; Alleghany, NC; Stanly, NC |
| Headline | Flash Flood Warning issued August 4 at 10:49PM EDT until August 5 at 1:30AM EDT by NWS Blacksburg VA |
| Expires | 2026-08-05T01:30:00-04:00 |
| SenderName | NWS Blacksburg VA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bb00761590ef84f02a62e8df9de01615802ecb45.001.1","noaa_urn:oid:2.49.0.1.840.0.8779b0132a0cfc82cf01480543910e7ae9268869.001.1","noaa_urn:oid:2.49.0.1.840.0.2b969d5eca2ccc2248ab9b5842dd5c0c842b4562.001.1"] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.