Philadelphia, PA – A quiet, breezy Thursday morning may be the calm before Pennsylvania’s first real winter punch. Meteorologists are tracking a developing low-pressure system expected to bring snow and freezing temperatures to the Philadelphia area by late Saturday night — a cold reminder that December weather has arrived in force.
According to the National Weather Service, highs will stay in the upper 30s through Saturday before dropping into the 20s under mostly cloudy skies. Snow becomes increasingly likely after dark Saturday, with a 70% chance of accumulation before tapering off Sunday. Roads could quickly turn slick, especially in shaded areas and bridges across the I-95 and I-76 corridors.
Drivers and travelers are urged to plan ahead, as rain may briefly mix with snow before freezing temperatures set in. Flash freezing could lead to black ice early Sunday morning, particularly for early commuters or those heading out for weekend errands. Gusty winds will make it feel even colder, with wind chills in the teens by Sunday evening.
Meteorologists say this storm is part of a larger clipper system sliding east from the Great Lakes — one that could deliver more snow bursts across the Mid-Atlantic into early next week. For now, the best advice: keep coats ready, drive cautiously, and check in on neighbors as winter’s first true chill settles in.
5-Day Outlook (Dec. 11–15):
- Friday: Mostly sunny, high near 37°F.
- Saturday: Mostly cloudy, high 41°F. Snow likely late.
- Saturday Night: Snow, low 26°F. 70% chance.
- Sunday: Chance of snow, high 31°F. Icy spots possible.
- Monday: Mostly sunny, high 30°F. Cold and crisp.
