This alert expired on 5 July 2026 at 02:45 UTC. It is kept here as a record.
No stronger detection stands among the 51 recorded within 20 km of this point since 17 March 2026 — 23 others scored the same. The last comparable one was on 7 June 2026.
What the source measured
NOAA reported: Special Marine Warning issued July 4 at 9:34PM EDT until July 4 at 10:45PM EDT by NWS Upton NY
An estimated 141,386 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 13, 2026 · score 43 · 2.1 km
- March 17, 2026 · score 43 · 9.9 km
- July 19, 2026 · score 43 · 11.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 85 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 85% |
| Coordinates | 41.0706, -72.2098 |
| Nearest City | Waterford (31 km) |
| Population Exposed | 141.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-05T01:34:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.012f816037da687b4c7191e3978a5c1d |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | 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; Waters from Moriches Inlet NY to Montauk Point NY from 20 to 60 NM; Waters from Fire Island Inlet NY to Moriches Inlet NY from 20 to 60 NM; Rhode Island Sound; Block Island Sound; Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 NM South of Block Island; Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM; 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; Long Island Sound West of New Haven CT/Port Jefferson NY; Peconic and Gardiners Bays |
| Headline | Special Marine Warning issued July 4 at 9:34PM EDT until July 4 at 10:45PM EDT by NWS Upton NY |
| Expires | 2026-07-04T22:45:00-04:00 |
| SenderName | NWS Upton NY |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.012f816037da687b4c7191e3978a5c1d569924ad.002.1","noaa_urn:oid:2.49.0.1.840.0.62b2fa4bef2031c84f3ea4d5b3be76a9bed39a70.001.1","noaa_urn:oid:2.49.0.1.840.0.93615c301d0fc3f2ddff9b2c95cbc48396e61cf6.001.1"] |
| Iem TypeSummary | M |
| Iem Magnitude | 42 |
| Iem Unit | MPH |
| Iem City | 4 S South Kingstown |
| Iem County | ANZ237 |
| Iem State | RI |
| Iem Wfo | BOX |
| Iem Remark | Mesonet on Matunuck Beach. |
| MergedSources | [{"id":"iem_M_41.370_-71.540_1783213620000","source":"iem","severity":"low","severityValue":25,"timestamp":1783213620000,"latitude":41.37,"longitude":-71.54}] |
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 10 February 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 Waterford?
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 188 scientific monitoring sources.