A strong cold front is moving through the Philadelphia area tonight, bringing a line of showers and a few thunderstorms between now (to the west) and 3 a.m. The line will be fast-moving but could produce brief gusty winds. The atmosphere is not very unstable, but it is strongly sheared, which means a few stronger wind gusts could mix down to the surface.
Lightning will be limited given the shallow, low-topped nature of the storms.
CBS News Philadelphia
Behind the front, rain quickly tapers toward the morning, but some wraparound showers could linger into Monday, especially north and west. Winds will shift sharply to the west-northwest and increase through the day, with gusts reaching 25 to 35 mph. Temperatures will be about 10 to 15 degrees cooler than Sunday, keeping highs in the 50s a