Right now
The most recent data we hold from NOAA arrived 5 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 May 2026 at 21:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 23 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 19 at 5:06PM EDT until May 19 at 5:45PM EDT by NWS Gray ME
An estimated 319,333 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 4, 2026 · score 48 · 17.3 km
- July 16, 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 79 % 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 | 79% |
| Coordinates | 42.9646, -70.6169 |
| Nearest City | Portsmouth (17 km) |
| Population Exposed | 319.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T21:06:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.a8e420caec1a343aaf658dbbbf507d36 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Coastal Waters from Cape Elizabeth, ME to Merrimack River, MA out 25 NM; Waters from Cape Elizabeth ME to Merrimack River MA from 25 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 May 19 at 5:06PM EDT until May 19 at 5:45PM EDT by NWS Gray ME |
| Expires | 2026-05-19T17:45:00-04:00 |
| SenderName | NWS Gray ME |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a8e420caec1a343aaf658dbbbf507d368d2fbe89.001.1","noaa_urn:oid:2.49.0.1.840.0.da51c3795094ae21fb2c966689fa4a1a251076b1.001.1"] |
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 Portsmouth?
Calamity.live data shows a weather event with CalamityScore 43/100, near Portsmouth (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.