This alert expired on 2 September 2026 at 03:00 UTC. It is kept here as a record.
It is the 50th strongest of the 80 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Special Marine Warning issued September 1 at 9:25PM EDT until September 1 at 11:00PM EDT by NWS Mount Holly NJ
An estimated 402,322 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 10, 2026 · score 43 · 8.3 km
- July 9, 2026 · score 43 · 8.3 km
- July 5, 2026 · score 43 · 8.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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) | 37 / 100 |
| Our confidence | 81% |
| Coordinates | 39.3573, -75.0037 |
| Nearest City | Millville (6 km) |
| Population Exposed | 402.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T01:25:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.b9ac06987ec408dedd29fc758e62e5a4a7bb2cbe.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; Coastal waters from Cape Henlopen to Fenwick Island DE out 20 NM; Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 NM; Coastal waters from Little Egg Inlet to Great Egg Inlet NJ out 20 NM; Coastal waters from Great Egg Inlet to Cape May NJ out 20 NM; Waters from Manasquan Inlet NJ to Little Egg Inlet NJ from 20 to 60 NM; Waters from Little Egg Inlet NJ to Great Egg Inlet NJ from 20 to 60 NM; Waters from Great Egg Inlet NJ to Cape May NJ from 20 to 60 NM; Delaware Bay waters north of East Point NJ to Slaughter Beach DE |
| Headline | Special Marine Warning issued September 1 at 9:25PM EDT until September 1 at 11:00PM EDT by NWS Mount Holly NJ |
| Expires | 2026-09-01T23:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b9ac06987ec408dedd29fc758e62e5a4a7bb2cbe.001.1","noaa_urn:oid:2.49.0.1.840.0.e84e90011190b9a065e658bb39391d829a19770e.001.1","noaa_urn:oid:2.49.0.1.840.0.7f1df90d928748e0ad251825f96ef07e972e3dc8.001.1"] |
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 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 37/100, near Millville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.