Freeze watch for Delaware, Philadelphia counties Tuesday; temps could fall to 30 degrees
National Weather Service warns of sub-freezing temperatures overnight into early Tuesday, mainly outside city centers.
On Sunday at 1:11 a.m. the National Weather Service issued a freeze watch valid for Tuesday between midnight and 9 a.m. for Delaware and Philadelphia counties.
The weather service informs, "Sub-freezing temperatures as low as 30 degrees possible, mainly outside of the urban city centers."