This alert expired on 19 July 2026 at 01:00 UTC. It is kept here as a record.
No stronger detection stands among the 24 recorded within 20 km of this point since 17 March 2026 — 4 others scored the same. The last comparable one was on 5 July 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 18 at 7:55PM EDT until July 18 at 9:00PM EDT by NWS Upton NY
An estimated 1,586,221 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 12, 2026 · score 46 · 4.8 km
- June 11, 2026 · score 46 · 7.9 km
- June 12, 2026 · score 46 · 8.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 out of 100, at 79 % 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 | 79% |
| Coordinates | 40.7429, -73.0476 |
| Nearest City | Sayville (3 km) |
| Population Exposed | 1.6M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T23:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.167903075acf4440f1ba203c751cf30e3d74ac10.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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 |
| Headline | Special Marine Warning issued July 18 at 7:55PM EDT until July 18 at 9:00PM EDT by NWS Upton NY |
| Expires | 2026-07-18T21:00:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
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 Sayville?
Calamity.live data shows a weather event with CalamityScore 52/100, near Sayville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.