This alert expired on 19 July 2026 at 01:15 UTC. It is kept here as a record.
No stronger detection stands among the 35 recorded within 20 km of this point since 20 May 2026 — 9 others scored the same. The last comparable one was on 18 July 2026. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 18 at 8:09PM EDT until July 18 at 9:15PM EDT by NWS Upton NY
An estimated 3,098,115 people live within 50 km of this point.
Nearby, since 20 May 2026
- August 7, 2026 · score 52 · 9.1 km
- June 11, 2026 · score 46 · 15.4 km
- August 10, 2026 · score 52 · 16.0 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 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) | 52 / 100 |
| Our confidence | 80% |
| Coordinates | 40.8510, -73.2074 |
| Nearest City | Smithtown (1 km) |
| Population Exposed | 3.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-19T00:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.21f42b50a665b7c096452bf5dcb028b0 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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; 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 8:09PM EDT until July 18 at 9:15PM EDT by NWS Upton NY |
| Expires | 2026-07-18T21:15:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.21f42b50a665b7c096452bf5dcb028b06ca3d66b.001.1","noaa_urn:oid:2.49.0.1.840.0.167903075acf4440f1ba203c751cf30e3d74ac10.001.1"] |
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.
Want to know when something happens near Smithtown?
Calamity.live data shows a weather event with CalamityScore 52/100, near Smithtown (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.