This alert expired on 3 August 2026 at 06:00 UTC. It is kept here as a record.
It is the 5th strongest of the 56 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 27 July 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 3 at 12:36AM EDT until August 3 at 2:00AM EDT by NWS Mount Holly NJ
An estimated 211,604 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 3, 2026 · score 37 · 4.2 km
- August 28, 2026 · score 43 · 8.8 km
- May 14, 2026 · score 43 · 14.4 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, at 81 % 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) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 39.1386, -75.1129 |
| Nearest City | Millville (30 km) |
| Population Exposed | 211.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-03T04:36:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.877b8cc3e85879902a3198ecb6dd37476e92c564.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Delaware Bay waters north of East Point NJ to Slaughter Beach DE; Delaware Bay waters south of East Point NJ to Slaughter Beach DE; Coastal waters from Great Egg Inlet to Cape May NJ out 20 NM; Coastal waters from Cape May NJ to Cape Henlopen DE out 20 NM |
| Headline | Special Marine Warning issued August 3 at 12:36AM EDT until August 3 at 2:00AM EDT by NWS Mount Holly NJ |
| Expires | 2026-08-03T02:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
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.
Want to know when something happens near Millville?
Calamity.live data shows a weather event with CalamityScore 43/100, near Millville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.