Pennsylvania — Headlights blur through fog along the Parkway as damp air hangs over the Monongahela at daybreak. Temperatures hover near 36 degrees, and visibility drops in pockets across Allegheny County.
Patchy fog lingers through about 9 a.m., then partial sunshine breaks out. Highs climb to 56, unusually mild for mid-February. South winds stay light, but the calm air keeps that damp chill close to the ground early.
Rain chances increase late tonight after 3 a.m. Clouds thicken, and lows settle near 44. By Wednesday morning, steady rain moves in. The National Weather Service calls for a 100 percent chance of rain, mainly after 7 a.m., with highs near 60. Up to a quarter inch of rainfall is possible. Roads along I-376 and I-79 could turn slick for the morning and evening commute. Plan extra travel time.
Showers taper Wednesday night, but scattered rain lingers. Thursday brings another 40 percent chance of rain with highs near 61. Rain becomes likely again Thursday night. An 80 percent chance of steady rainfall could bring between a quarter and half inch by early Friday.
Friday stays wet. Rain remains likely before 1 p.m., with highs near 58. By Friday night, skies begin to clear and temperatures dip to 37.
The weekend turns colder. Saturday looks mostly sunny near 48. However, Saturday night introduces a 40 percent chance of rain and snow with lows near 32. Sunday carries a 50 percent chance of snow and highs near 39. Even light accumulation could create slushy spots.
