This alert expired on 5 July 2026 at 00:00 UTC. It is kept here as a record.
No stronger detection stands among the 34 recorded within 20 km of this point since 17 March 2026 — 2 others scored the same. The last comparable one was on 7 June 2026.
What the source measured
NOAA reported: Special Marine Warning issued July 4 at 6:56PM EDT until July 4 at 8:00PM EDT by NWS Upton NY
An estimated 669,592 people live within 50 km of this point.
Nearby, since 17 March 2026
- July 31, 2026 · score 48 · 6.6 km
- July 19, 2026 · score 43 · 22.2 km
- March 17, 2026 · score 43 · 22.8 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 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) | 48 / 100 |
| Our confidence | 79% |
| Coordinates | 41.3119, -72.3481 |
| Nearest City | Waterford (18 km) |
| Population Exposed | 669.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T22:56:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a6010ff26f6d909642df2e16863d20cd2dc3ea8b.001.1 |
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 East of the Mouth of the Connecticut River |
| Headline | Special Marine Warning issued July 4 at 6:56PM EDT until July 4 at 8:00PM EDT by NWS Upton NY |
| Expires | 2026-07-04T20:00:00-04:00 |
| 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 Waterford?
Calamity.live data shows a weather event with CalamityScore 48/100, near Waterford (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.