A thunderstorm watch is in effect in areas throughout the tri-state, continuing through this evening.
The watch is for Rockland, Westchester, Essex, Hudson, Nassau, Putnam, Hunterdon and Morris counties, as well as throughout the five boroughs.
Warren county in New Jersey is also under a flash flood warning.
Radar information indicated a thunderstorm capable of producing quarter-sized hail, and damaging winds in excess of 60 miles per hour.
The watch is in effect until 8 p.m. The rest of Saturday night into Sunday will be muggy.
Stay with NBC 4 New York online and on air at 6 and 11 for updated weather information, and track the storm on our interactive radar.
Get the latest from NBC 4 New York's weather team anytime, anywhere. Follow us on Twitter, Facebook and Google+. Get our apps here and sign up for email newsletters here. Get breaking news delivered right to your phone -- just text NYBREAKING to 639710. For more info, text HELP. To end, text STOP. Message and data rates may apply.