Marine Thunderstorm Wind — Narragansett Bay, Atlantic North

2021-11-13 · near Bristol Harbor, Narragansett Bay, Atlantic North

Event narrative

In Narragansett Bay, Weatherflow mesonet stations recorded severe-level wind gusts from thunderstorms, including 60 mph at Castle Island in Bristol Harbor at 529 PM EST, 59 mph at Halfway Rock, south of Prudence Island, at 529 PM EST, and 59 mph at Sabin Point in Riverside.

Wider weather episode

A fast-moving cold front combined with a potent short-wave trough lifting northeastward across western and northern New England to produce severe thunderstorms across southern New England. Despite dewpoint temperatures only in the 30s and 40s, the cold pool aloft created instability and there was very strong low-level helicity. The result was an unprecedented outbreak of tornadoes across Long Island, Connecticut, and Rhode Island.

View location on OpenStreetMap → (41.6537, -71.2870)

Source: NOAA Storm Events Database, event_id 990179. Narrative written by the NWS forecast office that issued the report.