The National Weather Service in New York issued a frost advisory October 31 for portions of Long Island, southern Westchester County and coastal Connecticut.
Forecasters expect temperatures as low as 32 degrees Fahrenheit overnight. The notice says colder locations along southeastern Connecticut’s coast and in Long Island’s Pine Barrens could spend a few hours below freezing.
The advisory runs from 10 p.m. Eastern Daylight Time Saturday through 8 a.m. Eastern Standard Time Sunday, November 1. That period crosses the overnight change from daylight to standard time.
In Connecticut, the affected areas are southern Fairfield, New Haven, Middlesex and New London counties. In New York, the notice includes southern Westchester and the listed forecast zones across Suffolk County.
The weather service warns that frost could harm sensitive vegetation. Its public instructions advise protecting tender plants from the cold.
The forecast concerns conditions expected during the advisory period, rather than temperatures already measured Saturday afternoon. The possibility of a few hours below freezing applies particularly to the colder locations specified in the bulletin.
Sources NWS New York/Upton — October 31 Frost Advisory: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.bfc1e3effefc45f838bef4ed104bf803fc962e6d.001.1