This alert expired on 18 July 2026 at 23:46 UTC. It is kept here as a record.
It is the 3rd strongest of the 67 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 5 July 2026. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 18 at 7:36PM EDT until July 18 at 7:45PM EDT by NWS Mount Holly NJ
An estimated 336,641 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 8, 2026 · score 37 · 5.1 km
- August 28, 2026 · score 43 · 5.9 km
- March 17, 2026 · score 43 · 13.0 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 79 % 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 | 79% |
| Coordinates | 39.4057, -74.5636 |
| Nearest City | Pleasantville (4 km) |
| Population Exposed | 336.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T23:36:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Sandy Hook to Manasquan Inlet NJ out 20 NM; Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 NM; Waters from Sandy Hook NJ to Manasquan Inlet NJ from 20 to 40 NM; Waters from Manasquan Inlet NJ to Little Egg Inlet NJ from 20 to 60 NM; Delaware Bay waters south of East Point NJ to Slaughter Beach DE; 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; 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; 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; Waters from Cape May NJ to Fenwick Island DE from 20 to 60 NM; Coastal waters from Fenwick Island DE to Chincoteague VA out 20 NM; Coastal waters from Chincoteague to Parramore Island VA out 20 NM and 2 more areas |
| Headline | Special Marine Warning issued July 18 at 7:36PM EDT until July 18 at 7:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-18T19:46:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f0d2dfa46ad588a0c59ae039e1741baccea52e27.001.1","noaa_urn:oid:2.49.0.1.840.0.65471f76f3ff879bd729b34c86da3978588c09b4.001.1","noaa_urn:oid:2.49.0.1.840.0.d6b6018012fb2d67f192d936ac7faa84f7f2bede.001.1","noaa_urn:oid:2.49.0.1.840.0.9c972edf592cda9a03eb4c5768d07fc0a5c805b8.001.1","noaa_urn:oid:2.49.0.1.840.0.77b1fd8a9a88d832c2e54c6e12ee969a88959b06.001.1"] |
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.
Calamity.live data shows a weather event with CalamityScore 43/100, near Pleasantville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.