This alert expired on 28 August 2026 at 20:45 UTC. It is kept here as a record.
No stronger detection stands among the 10 recorded within 20 km of this point since 17 March 2026 — 8 others scored the same. The last comparable one was on 5 July 2026.
What the source measured
NOAA reported: Special Marine Warning issued August 28 at 3:10PM EDT until August 28 at 4:45PM EDT by NWS Mount Holly NJ
An estimated 320,553 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 4, 2026 · score 43 · 5.0 km
- July 5, 2026 · score 43 · 12.2 km
- June 7, 2026 · score 43 · 18.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 84 % 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 | 84% |
| Coordinates | 39.8867, -73.7625 |
| Nearest City | Bayville (33 km) |
| Population Exposed | 320.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-28T19:10:00.000Z |
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 |
| Headline | Special Marine Warning issued August 28 at 3:10PM EDT until August 28 at 4:45PM EDT by NWS Mount Holly NJ |
| Expires | 2026-08-28T16:45:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 1.42 |
| Iem Unit | Inch |
| Iem City | 1 NNE Surf City |
| Iem County | Ocean |
| Iem State | NJ |
| Iem Wfo | PHI |
| Iem Remark | Mesonet station FW2015 Surf City. |
| MergedSources | [{"id":"iem_R_39.670_-74.160_1787942700000","source":"iem","severity":"low","severityValue":25,"timestamp":1787942700000,"latitude":39.67,"longitude":-74.16}] |
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 Bayville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 194 scientific monitoring sources.