Right now
The most recent data we hold from NOAA arrived 8 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 21:15 UTC. It is kept here as a record.
It is the 13th strongest of the 100 detections recorded within 20 km of this point since 25 May 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued August 4 at 2:17PM EDT until August 4 at 5:15PM EDT by NWS Wakefield VA
Urban PEI: 142,737 within a heuristic 50 km radius; not unique people.
Nearby, since 25 May 2026
- September 12, 2026 · score 67 · 6.4 km
- September 12, 2026 · score 67 · 8.1 km
- September 13, 2026 · score 49 · 10.3 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 | 0.82/1 |
| Coordinates | 37.2040, -77.0617 |
| Nearest City | Hopewell (23 km) |
| Urban exposure index (PEI) | 142.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-04T18:17:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.86aea473ecaf0bc57910e2982892fd3d |
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: 2026-08-04T18:17:00.000Z.
First archived: 2026-08-04T18:33:51.020Z. 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 | Chesterfield, VA; City of Richmond, VA; Chesterfield, VA; Prince George, VA; City of Colonial Heights, VA; City of Hopewell, VA; City of Chesapeake, VA; City of Norfolk, VA; City of Portsmouth, VA; City of Suffolk, VA |
| Headline | Flash Flood Warning issued August 4 at 2:17PM EDT until August 4 at 5:15PM EDT by NWS Wakefield VA |
| Expires | 2026-08-04T17:15:00-04:00 |
| SenderName | NWS Wakefield VA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.86aea473ecaf0bc57910e2982892fd3dc047bb4b.001.1","noaa_urn:oid:2.49.0.1.840.0.7e286ff3ab82dfbdc1621909e986a8ad5b522e10.001.1","noaa_urn:oid:2.49.0.1.840.0.11cc39fd6a736f96fd8cb2978794fdf40a1af597.001.1"] |
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 near Hopewell?