This alert expired on 5 August 2026 at 00:03 UTC. It is kept here as a record.
No stronger detection stands among the 72 recorded within 20 km of this point since 17 March 2026 — 31 others scored the same. Another comparable one was recorded here earlier the same day. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 4 at 7:53PM EDT until August 4 at 8:00PM EDT by NWS Wakefield VA
An estimated 111,974 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 27, 2026 · score 43 · 9.3 km
- September 3, 2026 · score 37 · 14.2 km
- September 2, 2026 · score 37 · 14.2 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 91 % 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) | 43 / 100 |
| Our confidence | 91% |
| Coordinates | 37.0550, -77.6241 |
| Nearest City | Petersburg (28 km) |
| Population Exposed | 112.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-04T23:53:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.1d69caf935d13bc59241ee8dc947a665 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | City of Chesapeake, VA; City of Norfolk, VA; City of Portsmouth, VA; City of Suffolk, VA; Chesterfield, VA; City of Richmond, VA; Charles City, VA; Chesterfield, VA; Henrico, VA; City of Richmond, VA and 4 more areas |
| Headline | Flash Flood Warning issued August 4 at 7:53PM EDT until August 4 at 8:00PM EDT by NWS Wakefield VA |
| Expires | 2026-08-04T20:03:00-04:00 |
| SenderName | NWS Wakefield VA |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1d69caf935d13bc59241ee8dc947a665cffaf23d.001.1","noaa_urn:oid:2.49.0.1.840.0.0c13a3d87a52a5fb122817ed23979854f515d15e.001.1","noaa_urn:oid:2.49.0.1.840.0.c75d3c10bb854dac4c38820efb6769c48a2ba244.001.1","noaa_urn:oid:2.49.0.1.840.0.6148af4d8adb5161d1a90a0296929eb042da111b.001.1","noaa_urn:oid:2.49.0.1.840.0.70f0911119ee31e231eafa35c4af77852b51a8a6.001.1","noaa_urn:oid:2.49.0.1.840.0.bca4ad7266f02a29d5faeb8a3b957e969bad7515.001.1","noaa_urn:oid:2.49.0.1.840.0.273a9f740dadd12f9275b5c9a8e1b7aaab61e39b.001.1"] |
| Iem TypeSummary | F |
| Iem City | 1 ENE Walkers |
| Iem County | Dinwiddie |
| Iem State | VA |
| Iem Wfo | AKQ |
| Iem Remark | Rt. 751 near US-460 in Dinwiddie County closed due to flooding. |
| MergedSources | [{"id":"iem_R_37.010_-78.200_1785881580000","source":"iem","severity":"low","severityValue":25,"timestamp":1785881580000,"latitude":37.01,"longitude":-78.2},{"id":"iem_F_37.020_-78.210_1785882600000","source":"iem","severity":"low","severityValue":25,"timestamp":1785882600000,"latitude":37.02,"longitude":-78.21},{"id":"iem_F_37.160_-77.690_1785875460000","source":"iem","severity":"low","severityValue":25,"timestamp":1785875460000,"latitude":37.16,"longitude":-77.69},{"id":"iem_F_36.930_-78.080_1785883200000","source":"iem","severity":"low","severityValue":25,"timestamp":1785883200000,"latitude":36.93,"longitude":-78.08},{"id":"iem_R_36.690_-77.320_1785883620000","source":"iem","severity":"low","severityValue":25,"timestamp":1785883620000,"latitude":36.69,"longitude":-77.32},{"id":"iem_F_37.160_-77.690_1785872280000","source":"iem","severity":"low","severityValue":25,"timestamp":1785872280000,"latitude":37.16,"longitude":-77.69}] |
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 near Petersburg?
Calamity.live data shows a weather event with CalamityScore 43/100, near Petersburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.