Bergen and Passaic counties were under a severe weather watch for Friday night, with thunderstorms expected to roll through.
Travel warnings for an area stretching from Vermont and upstate New York to Virginia, Pennsylvania and western Long Island and Connectcut were in effect from 4 to 10 p.m., meteorologist Joe Cioffi said.
Humidity will continue to climb during the day, with isolated downpours possible, he said.
"If you a travelling to a vacation destination it might be easier to go earlier before thunderstorms arrive," Cioffi said.
"I am not forecasting anything catastrophic," he added. "This is simply a matter of thunderstorms threatening the 4 p.m.-10 p.m. time rush."
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