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.
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A frost advisory is in effect for eastern Passaic, western Bergen, western Essex, western Union, Middlesex, western Monmouth, Mercer, Salem, Gloucester and Camden counties.
The cold could damage tender vegetation in those areas.