This alert expired on 17 March 2026 at 05:00 UTC. It is kept here as a record.
No stronger detection stands among the 69 recorded within 20 km of this point since 12 March 2026 — 51 others scored the same. Another comparable one was recorded here earlier the same day. 29 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued March 17 at 12:35AM EDT until March 17 at 1:00AM EDT by NWS Mount Holly NJ
An estimated 8,984,535 people live within 50 km of this point.
Nearby, since 12 March 2026
- July 15, 2026 · score 52 · 5.9 km
- July 18, 2026 · score 52 · 7.3 km
- March 12, 2026 · score 52 · 8.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 83 % 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) | 52 / 100 |
| Our confidence | 83% |
| Coordinates | 40.2698, -73.7389 |
| Nearest City | Long Branch (22 km) |
| Population Exposed | 9.0M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T04:35:00.000Z |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40 nm; Waters from Little Egg Inlet NJ to Great Egg Inlet NJ out 20 to 40 nm from 20 to 40 NM; Waters from Great Egg Inlet NJ to Cape May NJ out 20 to 40 nm; Long Island Sound West of New Haven CT/Port Jefferson NY; South Shore Bays from Jones Inlet through Shinnecock Bay; Fire Island Inlet NY to Moriches Inlet NY out 20 nm; Sandy Hook NJ to Fire Island Inlet NY out 20 nm; Waters from Fire Island Inlet NY to Moriches Inlet NY from 20 to 40 NM; Waters from Sandy Hook NJ to Fire Island Inlet out 20 to 40 nm and 2 more areas |
| Headline | Special Marine Warning issued March 17 at 12:35AM EDT until March 17 at 1:00AM EDT by NWS Mount Holly NJ |
| Expires | 2026-03-17T01:00:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4c4da1ee21698a3760a9d396cc3cb3d2b7aaed7a.002.1","noaa_urn:oid:2.49.0.1.840.0.07ac053db8f959b3d6e2e719586a593001a7c3f7.001.1","noaa_urn:oid:2.49.0.1.840.0.c6ef2b22cec1bd7dedc31cb900f06ca62d3fe0c6.001.1","noaa_urn:oid:2.49.0.1.840.0.f433aea624b6bf70736d6004b602c1bad204a9b2.001.1","noaa_urn:oid:2.49.0.1.840.0.58dad4de79ecab41e0dab42ae9072c8046e3c146.001.1"] |
| Spc ReportType | wind |
| Spc Speed | 64 |
| Spc Location | Keyport |
| Spc County | Monmouth |
| Spc State | NJ |
| Spc Comments | Measured with Davis anemometer. (PHI) |
| MergedSources | [{"id":"spc_wind_40.44_-74.20_323","source":"spc","severity":"medium","severityValue":45,"timestamp":1773720780000,"latitude":40.44,"longitude":-74.2}] |
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 52/100, near Long Branch (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.