A Frost Advisory remains in effect from 4 am to 9 am EDT Tuesday, according to the National Weather Service.
Temperatures as low as 33 will result in frost.
Where: New Jersey, Sussex, and Warren Counties
In Pennsylvania: Berks, Lehigh, and Northampton Counties
Frost could kill sensitive outdoor vegetation if left uncovered.
A widespread freeze is expected to occur Wednesday night.
Potted plants should be brought inside.
Source: National Weather Service
