This alert expired on 11 June 2026 at 23:00 UTC. It is kept here as a record.
It is the 10th strongest of the 21 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 11 at 5:56PM EDT until June 11 at 7:00PM EDT by NWS Upton NY
An estimated 1,446,457 people live within 50 km of this point.
Nearby, since 12 March 2026
- June 11, 2026 · score 46 · 3.7 km
- July 19, 2026 · score 52 · 10.6 km
- August 13, 2026 · score 52 · 14.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 80 % 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) | 46 / 100 |
| Our confidence | 80% |
| Coordinates | 41.0182, -72.7745 |
| Nearest City | Mastic (25 km) |
| Population Exposed | 1.4M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T21:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.dd756ec6cbfb6b54e4aa0a307877b1e5 |
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; Waters from Fire Island Inlet NY to Moriches Inlet NY from 20 to 60 NM; Long Island Sound East of New Haven CT/Port Jefferson NY to the Mouth of the Connecticut River; Long Island Sound West of New Haven CT/Port Jefferson NY |
| Headline | Special Marine Warning issued June 11 at 5:56PM EDT until June 11 at 7:00PM EDT by NWS Upton NY |
| Expires | 2026-06-11T19:00:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.dd756ec6cbfb6b54e4aa0a307877b1e5e02b6874.001.1","noaa_urn:oid:2.49.0.1.840.0.e1518df542eb48ad97b71c556aef780026548300.001.1","noaa_urn:oid:2.49.0.1.840.0.153439cc694722e02d9902c687d7412d3cefa390.001.1"] |
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 46/100, near Mastic (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.