By Justin Drabick
PHILADELPHIA (CBS)--The cold high pressure system that brought the sunshine today across the Delaware Valley will keep the cold air locked in place tonight allowing for more snow. Low pressure currently in the Midwest will track east tonight and bring a round of snow into the region early Tuesday morning, just in time for the morning drive. Low temperatures tonight will drop into the mid 20s with temps slowly climbing into the 30s Tuesday morning. Winter weather advisories will go into effect at 3 a.m. Tuesday for most of the region, except for the coastal areas. Expect slow travel with reduced visibility during the morning drive.
Expect the snow to arrive between 2-4 a.m. Tuesday and end by late morning. The heaviest snow will occur around 6-9 a.m. with some 1″ per hour snowfall rates possible. The snow will mix and change to rain in southern New Jersey and central Delaware. Skies will begin to clear in the afternoon with highs reaching the low 40s.
Snow amounts of 2-4″ for Philadelphia and surrounding PA, NJ and DE suburbs up through the Lehigh Valley. 4-6″ is possible for the Poconos. Expect lesser amounts of 1-2″ for southern New Jersey and central Delaware and little to no accumulation for the coastal areas.
A pattern change will then be underway for the second half of the week with a warm front moving through. Expect high temperatures to return at or above average in the 40s and 50s from Wednesday through the weekend. There will be a good chance of rain on Friday with highs well into the 50s. Temperatures stay at or above average through the weekend.