This alert expired on 5 July 2026 at 03:45 UTC. It is kept here as a record.
It is the strongest of the 5 detections recorded within 20 km of this point since 5 July 2026.
What the source measured
NOAA reported: Special Marine Warning issued July 4 at 11:01PM EDT until July 4 at 11:45PM EDT by NWS Boston/Norton MA
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 60 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 40.9617, -70.7817 |
| Nearest City | Newport (74 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-05T03:01:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.a288df27a5e150b07ee3a7bfecdc21090f60a4fa.002.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Nantucket Sound; Vineyard Sound; Buzzards Bay; Rhode Island Sound; Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket; Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island; Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM; Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM |
| Headline | Special Marine Warning issued July 4 at 11:01PM EDT until July 4 at 11:45PM EDT by NWS Boston/Norton MA |
| Expires | 2026-07-04T23:45:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| 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 8 March 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 in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.