Gov. Phil Murphy declared a state of emergency for New Jersey starting at 5 p.m. ahead of a January nor’easter that is expected to bring more than 1 foot of snow to parts of the state.

Blizzard warnings are in effect for Atlantic, Eastern Burlington, Cape May, Monmouth and Ocean counties. Winter storm watches are in effect for Sussex and Warren counties. The rest of the state is under a winter storm warning.

The New Jersey Department of Transportation has also put a commercial vehicle ban on multiple interstates starting at 5 p.m.

“Our advice to everyone: Just hunker down,” Murphy wrote on Twitter. “Please leave the roads empty for all the road crews to do their jobs. If you see a road crew getting into position or working, please let them have the road ahead of you.”

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New Jersey Transit has also temporarily suspended all bus, River LINE and Access Link service for Saturday. Cross-honoring on trains will be in effect. NJ Transit says service will resume on Saturday whenever it is safe to do so.

Snow is expected to become heavy late Friday night and last until Saturday afternoon. Parts of the state, particularly along the coast, could see up to 18 inches of snow.