Right now
The most recent data we hold from NOAA arrived 9 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 17 March 2026 at 05:30 UTC. It is kept here as a record.
It is one of only 3 we have recorded within 20 km of this point since 17 March 2026.
What the source measured
NOAA reported: Special Marine Warning issued March 17 at 1:16AM EDT until March 17 at 1:30AM EDT by NWS Mount Holly NJ
Urban PEI: 772,423 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- March 17, 2026 · score 48 · 0.0 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 48 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 48 / 100 |
| Legacy data-support index | 0.83/1 |
| Coordinates | 40.5056, -72.8994 |
| Nearest City | Sayville (30 km) |
| Urban exposure index (PEI) | 772.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-17T05:16:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.a4480611e8ea18d96cc0500fc9463d53 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-03-17T05:16:00.000Z.
First archived: 2026-03-17T05:22:41.240Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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 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 |
| Headline | Special Marine Warning issued March 17 at 1:16AM EDT until March 17 at 1:30AM EDT by NWS Mount Holly NJ |
| Expires | 2026-03-17T01:30:00-04:00 |
| SenderName | NWS Mount Holly NJ |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a4480611e8ea18d96cc0500fc9463d53b2737b00.002.1","noaa_urn:oid:2.49.0.1.840.0.9bfc973f7cff8e2b8f4e1617eb32e4b6651ed17e.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 8 March 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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens near Sayville?