Impacted towns include West Chester, Phoenixville, West Norriton, East Norriton, Downingtown, Valley Forge, Paoli, Chester Springs, Newtown Square, Lionville, King Of Prussia, Lionville-Marchwood, Radnor Township, West Goshen, Malvern, Exton, Thorndale, Audubon, Chesterbrook, and
Eagleville.
The warning was initially set to expire at 5 p.m. before being extended to 5:30 p.m.