The so-called megasites at the Moorestown Mall in Burlington County, the NJ Exposition Center in Middlesex County and Rockaway Townsquare Mall in Morris County were closed. Anyone with an appointment at those sites will need reschedule for later this week, said Gov. Phil Murphy.
The site in Bergen County is set to close later Thursday morning. The sites in Atlantic and Gloucester counties, where officials said it was raining, remained open.
Murphy also ordered state government offices to close except for essential workers, put in place a commercial vehicle restriction on the state's highways and asked residents to stay home.
The storm brought snow to the northern part of the state and rain to the south. It was expected to end by Friday.
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Transportation Commissioner Diane Gutierrez-Scaccetti asked residents to stay off the roads if they can.
"Watch a good movie," she said. "'Frozen' is always a good choice."