This alert expired on 10 August 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 27 recorded within 20 km of this point since 17 March 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 10 at 6:49PM EDT until August 10 at 7:00PM EDT by NWS Upton NY
An estimated 2,298,253 people live within 50 km of this point.
Nearby, since 17 March 2026
- June 12, 2026 · score 46 · 3.3 km
- August 7, 2026 · score 52 · 7.6 km
- July 18, 2026 · score 52 · 11.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 84 % 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 | 84% |
| Coordinates | 40.7100, -73.1705 |
| Nearest City | Islip (4 km) |
| Population Exposed | 2.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T22:49:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.edbd4f127082f900c1536fbceda6661679cd944e.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Long Island Sound West of New Haven CT/Port Jefferson NY; South Shore Bays from Jones Inlet through Shinnecock Bay; Fire Island Inlet NY to Moriches Inlet NY out 20 NM; Sandy Hook NJ to Fire Island Inlet NY out 20 NM; Waters from Fire Island Inlet NY to Moriches Inlet NY from 20 to 60 NM |
| Headline | Special Marine Warning issued August 10 at 6:49PM EDT until August 10 at 7:00PM EDT by NWS Upton NY |
| Expires | 2026-08-10T19:00:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| Iem TypeSummary | M |
| Iem Magnitude | 44 |
| Iem Unit | MPH |
| Iem City | NYC/JFK |
| Iem County | Queens |
| Iem State | NY |
| Iem Wfo | OKX |
| Iem Remark | ASOS station KJFK NYC/JFK Airport. |
| MergedSources | [{"id":"iem_M_40.640_-73.760_1786399200000","source":"iem","severity":"low","severityValue":25,"timestamp":1786399200000,"latitude":40.64,"longitude":-73.76}] |
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 Islip?
Calamity.live data shows a weather event with CalamityScore 52/100, near Islip (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.