Right now
The most recent data we hold from NOAA arrived 19 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 5 September 2026 at 18:30 UTC. It is kept here as a record.
It is the 23rd strongest of the 35 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 28 August 2026.
What the source measured
NOAA reported: Special Marine Warning issued September 5 at 1:16PM EDT until September 5 at 2:30PM EDT by NWS Wakefield VA
An estimated 15,052 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 29, 2026 · score 34 · 13.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 82 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 82% |
| Coordinates | 37.6105, -76.6133 |
| Nearest City | Williamsburg (39 km) |
| Population Exposed | 15.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-05T17:16:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.b381c111c4f6c713d7ab5464099efb2c611ca52d.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | James River from Jamestown to the James River Bridge; James River from JRB to HRBT, Including the Elizabeth River; Tidal Potomac from Indian Head to Cobb Island MD; Tidal Potomac from Cobb Island MD to Smith Point VA |
| Headline | Special Marine Warning issued September 5 at 1:16PM EDT until September 5 at 2:30PM EDT by NWS Wakefield VA |
| Expires | 2026-09-05T14:30:00-04:00 |
| SenderName | NWS Wakefield VA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b381c111c4f6c713d7ab5464099efb2c611ca52d.001.1","noaa_urn:oid:2.49.0.1.840.0.a27b08b3539cc9a3e23652fd7e10286615251889.001.1"] |
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 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 in this area?
Calamity.live data shows a weather event with CalamityScore 28/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.