Short Term: As the low pressure system swings north into Canada and its associated cold front moves off the coast, a strong area of high pressure will build over the mid-Atlantic. This high will move in from the southwest and induce a southwesterly isallobaric wind, which will keep temperatures from dropping too much in the wake of the cold front. The high will park itself right over PA for most of the weekend, keeping temps seasonal and skies partly clear.
Long Term: The high will move out of the area on Sunday night as a weak, slow-moving low pushes through the area. This disturbance will induce building clouds and some scattered showers throughout Monday and Tuesday.
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