Philadelphia, Pennsylvania — Dangerous arctic cold is expected to intensify across the region through the end of the week, with subzero wind chills forecast along major corridors including Interstate 95, I-76, and I-295.
According to the National Weather Service office in Mount Holly, the coldest conditions are expected Thursday night through Friday night, with wind chills dropping well below zero across eastern Pennsylvania, New Jersey, and Delaware. Forecast graphics show wind chills as low as -15 to -21 degrees in parts of the region late Friday night, including areas north and west of Philadelphia.
Thursday night wind chills are expected to range from -6 to -13 degrees, worsening further Friday night as stronger winds combine with bitterly cold air. Even coastal areas along the New Jersey shoreline may see wind chills near or below zero.
The prolonged cold increases risks for frostbite and hypothermia, with exposed skin potentially affected in as little as 30 minutes. Travel impacts are also possible, especially overnight and early morning, as cold temperatures can affect vehicles and create icy patches on untreated roadways, bridges, and ramps.
In addition to the cold, forecasters continue to monitor a potential coastal storm for Sunday. While strong winds and coastal flooding risks are becoming clearer, snowfall amounts remain uncertain. Current blended model guidance shows roughly a 30–45% chance of at least 4 inches of snow, with higher probabilities closer to the coast from southern New Jersey into Delaware.
The National Weather Service emphasized that snowfall confidence remains lower than cold confidence, and details may shift as the system approaches.
Residents are urged to limit time outdoors, dress in layers, protect pets and pipes, and monitor forecast updates closely through the weekend.
Early-morning commuters, students, and service workers traveling along I-95 and surrounding routes should prepare for extreme cold and rapidly changing conditions.
