New Jerseyans are facing a cold morning after a weekend of mild temperatures.
A freeze warning is in effect for Sussex, Warren, Morris, Hunterdon, Somerset, western Passaic, Ocean, Cumberland, Atlantic and southeast Burlington counties.
Freezing temperatures can kill unprotected crops and sensitive vegetation.
A frost advisory is in effect for eastern Passaic, western Bergen, western Essex, western Union, Middlesex, western Monmouth, Mercer, Salem, Gloucester and Camden counties.
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The cold could damage tender vegetation in those areas.