Right now
The most recent data we hold from NOAA arrived 2 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 4 August 2026 at 22:30 UTC. It is kept here as a record.
It is the 14th strongest of the 71 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 4 at 3:24PM EDT until August 4 at 6:30PM EDT by NWS Wakefield VA
Urban PEI: 108,714 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- September 13, 2026 · score 49 · 8.4 km
- June 23, 2026 · score 67 · 8.7 km
- August 4, 2026 · score 48 · 14.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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 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 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 37.0906, -76.9976 |
| Nearest City | Williamsburg (32 km) |
| Urban exposure index (PEI) | 108.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-04T19:24:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.c0a2252bacb5e4afae4678c3ef818807 |
Physical priority index · v1. 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: 2026-08-04T19:24:00.000Z.
First archived: 2026-08-04T19:36:04.751Z. 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 | City of Chesapeake, VA; City of Norfolk, VA; City of Portsmouth, VA; City of Suffolk, VA; City of Virginia Beach, VA; City of Chesapeake, VA; City of Norfolk, VA; City of Portsmouth, VA; City of Suffolk, VA; Chesterfield, VA; Prince George, VA; City of Colonial Heights, VA; City of Hopewell, VA and 5 more areas |
| Headline | Flash Flood Warning issued August 4 at 3:24PM EDT until August 4 at 6:30PM EDT by NWS Wakefield VA |
| Expires | 2026-08-04T18:30:00-04:00 |
| SenderName | NWS Wakefield VA |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c0a2252bacb5e4afae4678c3ef8188076c9619c8.001.1","noaa_urn:oid:2.49.0.1.840.0.9d7b5ebbfa9447bdf30f991a6b701d5381e0b7b8.001.1","noaa_urn:oid:2.49.0.1.840.0.df37216b47bd994d7c3e28ccd90952074170e93b.001.1","noaa_urn:oid:2.49.0.1.840.0.780f91f595c34c3a9c4503790bf6789ff07376dc.001.1","noaa_urn:oid:2.49.0.1.840.0.bc884997378183e057c8926bd8db37747663f4e7.001.1","noaa_urn:oid:2.49.0.1.840.0.d68fd80d613c78b07b489647d720ef87462a03ee.001.1","noaa_urn:oid:2.49.0.1.840.0.edb35b65804f28318059e722150e144dc8c1a184.001.1","noaa_urn:oid:2.49.0.1.840.0.86aea473ecaf0bc57910e2982892fd3dc047bb4b.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.
Want to know when something happens in this area?