Right now
The most recent data we hold from NOAA arrived 14 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 16 July 2026 at 21:45 UTC. It is kept here as a record.
It is the 5th strongest of the 12 detections recorded within 20 km of this point since 19 May 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 16 at 5:10PM EDT until July 16 at 5:45PM EDT by NWS Boston/Norton MA
An estimated 258,327 people live within 50 km of this point.
Nearby, since 19 May 2026
- July 4, 2026 · score 48 · 18.5 km
- May 19, 2026 · score 43 · 24.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 80 % 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) | 43 / 100 |
| Our confidence | 80% |
| Coordinates | 42.7988, -70.4266 |
| Nearest City | Gloucester (28 km) |
| Population Exposed | 258.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-16T21:10:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.c22bc95119b7d6d5887c947e3532d2b5 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary; Massachusetts Bay and Ipswich Bay; Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM; Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM; Waters from Port Clyde ME to Cape Elizabeth ME from 25 to 60 NM; Waters from Cape Elizabeth ME to Merrimack River MA from 25 to 60 NM |
| Headline | Special Marine Warning issued July 16 at 5:10PM EDT until July 16 at 5:45PM EDT by NWS Boston/Norton MA |
| Expires | 2026-07-16T17:45:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c22bc95119b7d6d5887c947e3532d2b56c140137.001.1","noaa_urn:oid:2.49.0.1.840.0.51e263795166cd0d9cd038239101ab793ca7c2a1.001.1"] |
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 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 near Gloucester?
Calamity.live data shows a weather event with CalamityScore 43/100, near Gloucester (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.