Marine Thunderstorm Wind — Long Island Sound W of New Haven Ct To Port Jefferson Ny, Atlantic North

2025-07-08 · near Larchmont Harbor Wxflow, Long Island Sound W of New Haven Ct To Port Jefferson Ny, Atlantic North

Event narrative

Mesonet site XLAR at Larchmont Harbor measured a 43 knot wind gust.

Wider weather episode

At the surface, a cold front slowly approached from the west, with a pre-frontal trough developing ahead of it. Aloft, the area remained generally on the eastern edge of mid/upper level troughing. While shear was not all that impressive (about 25 kt of 0-6km bulk shear), strong heating aided in MLCAPE values reaching about 2000 j/kg. With lift from the aforementioned features, and likely help from the right entrance region of an upper level jet streak, showers and thunderstorms started to develop. Some storms reached severe criteria and produce damaging wind gusts.

View location on OpenStreetMap → (40.9200, -73.7300)

Source: NOAA Storm Events Database, event_id 1277844. Narrative written by the NWS forecast office that issued the report.