Apart from a few leftover showers in eastern PA, look for partly to mostly cloudy skies under warm and humid conditions for the end of the work week. For the weekend, expect showers and thunderstorms as a cold front slows on approach, finally passing through on Monday night, which will make things cooler and less humid for the middle of next week.
Models Used: 12z GFS, 12z NAM
Short-term:
High pressure at 700 mb & higher will be enough to keep the western two-thirds of the state dry, but high relative humidity throughout the lowest 10,000 ft (3,000 m) due to the weak cold front will keep clouds around for the entire Commonwealth and the weak cold front has slowed offshore, leading to showers for the southeastern parts of the state.
Long-Range:
As a cold front builds strength along the Mississippi River, it will slowly head northeast over the next few days. The offshore cold front hasn't done much to drop humidity, so there's enough moisture for scattered showers during the weekend. When the front gets closer, forcing will enhance the rainfall and lead to thunderstorms.
-Jaron Breen
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