Right now
The most recent data we hold from NOAA arrived 12 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 19 July 2026 at 07:00 UTC. It is kept here as a record.
It is one of only 4 we have recorded within 20 km of this point since 30 May 2026. The last comparable one was on 5 July 2026.
What the source measured
NOAA reported: Special Marine Warning issued July 19 at 1:55AM EDT until July 19 at 3:00AM EDT by NWS Boston/Norton MA
Nearby, since 30 May 2026
- May 30, 2026 · score 39 · 17.0 km
- July 5, 2026 · score 22 · 26.9 km
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 62 % 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 | 62% |
| Coordinates | 41.1614, -70.1729 |
| Nearest City | Barnstable (61 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-19T05:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.c9ac683860e82b46f96e56afae61da81f7d6f116.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Nantucket Sound; Vineyard Sound; Buzzards Bay; Rhode Island Sound; Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM; 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 Provincetown to Nantucket from 20 to 60 NM; Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM |
| Headline | Special Marine Warning issued July 19 at 1:55AM EDT until July 19 at 3:00AM EDT by NWS Boston/Norton MA |
| Expires | 2026-07-19T03:00:00-04:00 |
| 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.