This alert expired on 23 June 2026 at 18:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 57 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 23 at 1:26PM EDT until June 23 at 2:15PM EDT by NWS Wakefield VA
An estimated 1,323,975 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 19, 2026 · score 52 · 4.7 km
- July 7, 2026 · score 41 · 7.9 km
- July 28, 2026 · score 72 · 9.9 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 89 % 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) | 52 / 100 |
| Our confidence | 89% |
| Coordinates | 37.1181, -76.6587 |
| Nearest City | Williamsburg (17 km) |
| Population Exposed | 1.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-23T17:26:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.06c63d081b5056359d6a5bd847ca3b822d450b49.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | James River from Jamestown to the James River Bridge |
| Headline | Special Marine Warning issued June 23 at 1:26PM EDT until June 23 at 2:15PM EDT by NWS Wakefield VA |
| Expires | 2026-06-23T14:15:00-04:00 |
| SenderName | NWS Wakefield VA |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | Birchett Estate |
| Iem County | Prince George |
| Iem State | VA |
| Iem Wfo | AKQ |
| Iem Remark | Two trees down at intersection of Middle Road and Prince George Drive. |
| MergedSources | [{"id":"iem_H_37.250_-77.310_1782233640000","source":"iem","severity":"low","severityValue":25,"timestamp":1782233640000,"latitude":37.25,"longitude":-77.31},{"id":"iem_D_37.260_-77.280_1782233700000","source":"iem","severity":"low","severityValue":25,"timestamp":1782233700000,"latitude":37.26,"longitude":-77.28},{"id":"iem_D_37.250_-77.260_1782233700000","source":"iem","severity":"low","severityValue":25,"timestamp":1782233700000,"latitude":37.25,"longitude":-77.26},{"id":"iem_H_37.270_-77.270_1782233160000","source":"iem","severity":"low","severityValue":25,"timestamp":1782233160000,"latitude":37.27,"longitude":-77.27},{"id":"iem_H_37.270_-77.320_1782233820000","source":"iem","severity":"low","severityValue":25,"timestamp":1782233820000,"latitude":37.27,"longitude":-77.32},{"id":"iem_D_37.260_-77.280_1782233520000","source":"iem","severity":"low","severityValue":25,"timestamp":1782233520000,"latitude":37.26,"longitude":-77.28}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
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 52/100, near Williamsburg (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.