The theme for this week will be cloudy and cool with several chances for rain as a cut-off low pressure system parks itself over the mid-western United States. Monday, Tuesday, and Wednesday of this week will all be mostly cloudy with periods of rain, including the chance for a few isolated thunderstorms in the afternoon and evening. The clouds and precipitation will keep most of Pennsylvania below eighty with dew points around seventy degrees, so it will feel rather humid when it is not raining. The cloudy pattern is forecasted to end Thursday morning as some drier air enters the region, resulting in partly cloudy skies and high temperatures exceeding eighty degrees. The partly cloudy conditions will be short-lived as a cold front passes through the Commonwealth from Friday mid-morning to early evening. This front will bring mostly cloudy skies and periods of rain to most of Pennsylvania.