This alert expired on 17 March 2026 at 06:45 UTC. It is kept here as a record.
No stronger detection stands among the 55 recorded within 20 km of this point since 12 March 2026 — 36 others scored the same. Another comparable one was recorded here earlier the same day. 27 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued March 17 at 1:13AM EDT until March 17 at 2:45AM EDT by NWS Upton NY
An estimated 2,434,378 people live within 50 km of this point.
Nearby, since 12 March 2026
- June 13, 2026 · score 52 · 7.3 km
- June 12, 2026 · score 52 · 10.5 km
- August 10, 2026 · score 52 · 12.4 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 | 40.6098, -73.2419 |
| Nearest City | West Islip (13 km) |
| Population Exposed | 2.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T05:13:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.9bfc973f7cff8e2b8f4e1617eb32e4b6 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Long Island Sound East of the Mouth of the Connecticut River; Peconic and Gardiners Bays; South Shore Bays from Jones Inlet through Shinnecock Bay; Moriches Inlet NY to Montauk Point NY out 20 nm; Fire Island Inlet NY to Moriches Inlet NY out 20 nm; Sandy Hook NJ to Fire Island Inlet NY out 20 nm; Waters from Moriches Inlet NY to Montauk Point NY from 20 to 40 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; 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 out 20 to 40 nm; Waters from Manasquan Inlet NJ to Little Egg Inlet NJ out 20 to 40 nm; Long Island Sound West of New Haven CT/Port Jefferson NY and 1 more areas |
| Headline | Special Marine Warning issued March 17 at 1:13AM EDT until March 17 at 2:45AM EDT by NWS Upton NY |
| Expires | 2026-03-17T02:45:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9bfc973f7cff8e2b8f4e1617eb32e4b6651ed17e.001.1","noaa_urn:oid:2.49.0.1.840.0.6abc5f325d3e3bf67fe2227fbf12369f7dae0137.001.1","noaa_urn:oid:2.49.0.1.840.0.07ac053db8f959b3d6e2e719586a593001a7c3f7.001.1","noaa_urn:oid:2.49.0.1.840.0.c6ef2b22cec1bd7dedc31cb900f06ca62d3fe0c6.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 47 |
| Iem Unit | MPH |
| Iem City | 2 WNW Captree State Par |
| Iem County | ANZ345 |
| Iem State | NY |
| Iem Wfo | OKX |
| Iem Remark | State Boat Channel XGRS Mesonet. |
| MergedSources | [{"id":"iem_M_40.650_-73.300_1773723780000","source":"iem","severity":"low","severityValue":25,"timestamp":1773723780000,"latitude":40.65,"longitude":-73.3}] |
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 West Islip?
Calamity.live data shows a weather event with CalamityScore 52/100, near West Islip (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.