A quick-hitting winter system will bring snow to northern Pennsylvania and a wintry mix to southern areas tonight through Sunday, with some areas potentially seeing freezing drizzle. A more significant winter storm is expected Tuesday, which could produce widespread snowfall across the region.
Snow will begin spreading across northwestern Pennsylvania around midnight, with the highest accumulations expected in Warren County and other northwestern areas. The Laurel Highlands face a Winter Weather Advisory from 3 a.m. to noon Sunday due to the threat of freezing drizzle that could create slippery road conditions, particularly at higher elevations.
As the system moves through Sunday, some areas could experience snow squalls along the cold front, especially in the Alleghenies where instability will develop. Southern areas will likely transition to a rain-snow mix with temperatures reaching the 40s south of Interstate 80 and below 1,500 feet elevation. The front will pass through Bradford around 1 p.m., reaching Lancaster by 7 p.m., bringing gusty winds behind it.
Brief lake effect snow may affect far northwestern Pennsylvania Sunday night into early Monday as northwest flow develops behind the cold front. Monday should be mostly fair as high pressure builds in, though clouds will increase later in the day.
The main weather event of the week will arrive Tuesday, when a coastal storm is expected to bring widespread snow to the region. While confidence in exact timing and amounts remains moderate, forecasters indicate a “plowable snowfall” is likely for most areas. The Winter Storm Outlook highlights a 30-50 percent chance of warning criteria snowfall (5+ inches) in northeastern Pennsylvania, with slightly lower amounts expected in northwestern areas.
Below normal temperatures will continue through early December, with lows possibly dropping into the teens or single digits later in the week as the active storm pattern persists.
Current weather radar
