This alert expired on 21 July 2026 at 23:30 UTC. It is kept here as a record.
It is the 107th strongest of the 145 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued July 21 at 4:18PM EDT until July 21 at 7:30PM EDT by NWS Wakefield VA
An estimated 439,086 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 22, 2026 · score 43 · 3.0 km
- July 27, 2026 · score 43 · 7.4 km
- March 17, 2026 · score 43 · 8.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 79% |
| Coordinates | 37.7173, -77.6353 |
| Nearest City | Short Pump (8 km) |
| Population Exposed | 439.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-21T20:18:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.d15c8ff6922f42e929a4a20cf28e4ec9 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Goochland, VA; Hanover, VA; Henrico, VA; City of Richmond, VA; Caroline, VA; Cumberland, VA; Fluvanna, VA; Goochland, VA; Hanover, VA; Louisa, VA |
| Headline | Flash Flood Warning issued July 21 at 4:18PM EDT until July 21 at 7:30PM EDT by NWS Wakefield VA |
| Expires | 2026-07-21T19:30:00-04:00 |
| SenderName | NWS Wakefield VA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d15c8ff6922f42e929a4a20cf28e4ec9efe68d4c.001.1","noaa_urn:oid:2.49.0.1.840.0.9f50262355fef966105fd99d923b916e7f6e0a3f.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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 37/100, near Short Pump (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.