This alert expired on 4 July 2026 at 02:00 UTC. It is kept here as a record.
It is the 4th strongest of the 113 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 3 at 9:20PM EDT until July 3 at 10:00PM EDT by NWS Mount Holly NJ
An estimated 185,460 people live within 50 km of this point.
Nearby, since 12 March 2026
- March 12, 2026 · score 43 · 5.2 km
- June 7, 2026 · score 43 · 6.5 km
- July 17, 2026 · score 67 · 7.8 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % 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 | 90% |
| Coordinates | 39.5114, -74.1880 |
| Nearest City | Atlantic City (26 km) |
| Population Exposed | 185.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T01:20:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters from Manasquan Inlet to Little Egg Inlet NJ out 20 NM; Waters from Manasquan Inlet NJ to Little Egg Inlet NJ from 20 to 60 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 |
| Headline | Special Marine Warning issued July 3 at 9:20PM EDT until July 3 at 10:00PM EDT by NWS Mount Holly NJ |
| Expires | 2026-07-03T22:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.471f2bbb677417beffdec8dd8bcd45acaf312f59.002.1","noaa_urn:oid:2.49.0.1.840.0.bf7a0348c0577693fcd5e7cd45dcda8e078eb907.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 43 |
| Iem Unit | MPH |
| Iem City | 3 E Waretown |
| Iem County | ANZ451 |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | Kite Island mesonet. |
| MergedSources | [{"id":"iem_M_39.760_-74.090_1783127340000","source":"iem","severity":"low","severityValue":25,"timestamp":1783127340000,"latitude":39.76,"longitude":-74.09},{"id":"iem_M_39.940_-74.070_1783126140000","source":"iem","severity":"low","severityValue":25,"timestamp":1783126140000,"latitude":39.94,"longitude":-74.07},{"id":"iem_M_39.860_-74.130_1783126860000","source":"iem","severity":"low","severityValue":25,"timestamp":1783126860000,"latitude":39.86,"longitude":-74.13},{"id":"iem_M_39.840_-74.080_1783127040000","source":"iem","severity":"low","severityValue":25,"timestamp":1783127040000,"latitude":39.84,"longitude":-74.08},{"id":"iem_M_39.650_-74.210_1783128240000","source":"iem","severity":"low","severityValue":25,"timestamp":1783128240000,"latitude":39.65,"longitude":-74.21},{"id":"iem_M_39.800_-74.140_1783127040000","source":"iem","severity":"low","severityValue":25,"timestamp":1783127040000,"latitude":39.8,"longitude":-74.14}] |
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 Atlantic City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.