Right now
The most recent data we hold from NOAA arrived 11 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 02:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 38 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 18 at 9:39PM EDT until July 18 at 10:45PM EDT by NWS Boston/Norton MA
Urban PEI: 181,285 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- July 19, 2026 · score 43 · 0.7 km
- March 17, 2026 · score 43 · 4.1 km
- August 13, 2026 · score 43 · 11.4 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 41.1756, -72.1564 |
| Nearest City | Waterford (18 km) |
| Urban exposure index (PEI) | 181.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-19T01:39:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.e91b03b5b39a2961b3bc7a55b9f27e0f |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-07-19T01:39:00.000Z.
First archived: 2026-07-19T02:10:02.878Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Nantucket Sound; Vineyard Sound; Buzzards Bay; Rhode Island Sound; Block 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; Long Island Sound East of New Haven CT/Port Jefferson NY to the Mouth of the Connecticut River; Long Island Sound West of New Haven CT/Port Jefferson NY; Long Island Sound East of New Haven CT/Port Jefferson NY to the Mouth of the Connecticut River; Long Island Sound East of the Mouth of the Connecticut River; Peconic and Gardiners Bays; South Shore Bays from Jones Inlet through Shinnecock Bay; Moriches Inlet NY to Montauk Point NY out 20 NM |
| Headline | Special Marine Warning issued July 18 at 9:39PM EDT until July 18 at 10:45PM EDT by NWS Boston/Norton MA |
| Expires | 2026-07-18T22:45:00-04:00 |
| SenderName | NWS Boston/Norton MA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e91b03b5b39a2961b3bc7a55b9f27e0fb82474da.001.1","noaa_urn:oid:2.49.0.1.840.0.040a22291d0d81820e02febbcbb4b7366b02832c.001.1","noaa_urn:oid:2.49.0.1.840.0.1b5eaa86b4704d9f60c9bd23c60d5e4b971850a8.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
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