Right now
The most recent data we hold from NOAA arrived 10 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 13 August 2026 at 20:15 UTC. It is kept here as a record.
It is the 3rd strongest of the 7 detections recorded within 20 km of this point since 19 May 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued August 13 at 3:37PM EDT until August 13 at 4:15PM EDT by NWS Gray ME
An estimated 219,183 people live within 50 km of this point.
Nearby, since 19 May 2026
- August 28, 2026 · score 48 · 11.5 km
- May 19, 2026 · score 52 · 19.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 84 % 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 | 84% |
| Coordinates | 42.3245, -70.3565 |
| Nearest City | Gloucester (40 km) |
| Population Exposed | 219.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T19:37:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.a6d884ae2c33e5b892230b3be4e1e18a |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal Waters from Port Clyde, ME to Cape Elizabeth, ME out 25 NM; Casco Bay; Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM; Cape Cod Bay; Nantucket Sound; Cape Cod Bay; Nantucket Sound; Buzzards Bay |
| Headline | Special Marine Warning issued August 13 at 3:37PM EDT until August 13 at 4:15PM EDT by NWS Gray ME |
| Expires | 2026-08-13T16:15:00-04:00 |
| SenderName | NWS Gray ME |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a6d884ae2c33e5b892230b3be4e1e18afc8d66e7.001.1","noaa_urn:oid:2.49.0.1.840.0.872d0a855bf730e0eb31a0a7716753e727b5ff0e.001.1","noaa_urn:oid:2.49.0.1.840.0.41437aae08ec16bfb8372b24fd5e5ca3b22a5619.001.1"] |
| Google News RssFeed | weather |
| Google News SourceName | Boston 25 News |
| MergedSources | [{"id":"gnews_weather_496290_212","source":"google_news","severity":"medium","severityValue":40,"timestamp":1786646483000,"latitude":42.36,"longitude":-71.06}] |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.