Deep low pressure will intensify over the Great Lakes as it moves into Canada over the weekend.

Moisture moving over cold air during the morning on Saturday will initially result in snow and sleet around Philadelphia before turning to rain by noon. Light snow may begin as early as daybreak on Saturday, which is earlier than previously predicted.

Cold air at the surface will be slow to leave, making Saturday a cold and wet day. High will be near 40. Rain will be moderate to heavy Saturday afternoon and night.

An associated warm front will move through late Saturday night, but rain is likely to continue Sunday morning before tapering mid day Sunday. A cold front moves through late afternoon Sunday also accompanied by rain. High on Sunday mid 60s. Cold weather returns later Sunday night.

There’s a chance of light snow Tuesday.