Exton, PA Severe Weather Alertstar_ratehome

...Black Ice Will Develop on Area Roads Tonight...

With a fresh snowpack and cold air advection behind the departing
storm, a cold night is on tap for the region with lows bottoming
out in the teens to low 20s. There may be some areas where winds
can become light enough for radiational cooling, and then even
colder temperatures are possible.

These cold temperatures will allow for any standing water to
freeze, especially on untreated roadways. Black ice is difficult
to see and makes roads very slippery.