High temperatures by Thursday will reach the 60s and 70s in Alabama.
The agency has issued a wind chill advisory and a winter weather advisory. Temperatures will drop down into the single digits across most of New Jersey Thursday night and plummet close to zero - below zero in some places - by Saturday morning.
An arctic air mass entrenched over central North Carolina is to blame for the cold, the weather service said in a statement.
Wednesday could usher in highs stretching into the upper 40s, though an evening storm system is expected to put an end to the warm spell.
The advisory starts at 6 a.m.
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Update (Jan. 5): The wind chill advisory has been expanded to include all of New Jersey, eastern Pennsylvania and New York City, and it is now active through Sunday morning, Jan. 7. The high Saturday is expected to be around 11 degrees and wind gusts of 30 to 40 miles per hour are possible at any point into the evening, though the winds will die down overnight, Quinlan said. In a word: Brrrrr.
Wind chill values will make actual temperatures slightly above zero degrees feel 20-30 degrees colder than they are.
Hypothermia is also a serious risk; anyone outside is advised to dress as warmly as possible, says the Weather Service.
The high temperature for Friday is expected to be 4 degrees, according to the National Weather Service in Cleveland.
Snowfall totals have been considerably lower in western sections of the Garden State.