technical discussion

Synopsis

A series of low pressure system will ride up through the ohio valley and great lakes over the next several days. This will lead to continued unsettled weather. The pattern remains in place until about Friday when the thunderstorm activity should diminish as the last low pressure moves up into Canada and its cold front pushes through.

Short term

The train of lows into the great lakes region will cause unsettled weather over all of Pennsylvania. A strong southerly flow between the lows to our west and a large high off the coast in the Atlantic will advect in plenty of warm moist air. As a consequence, our temperatures should be well above average through Wednesday and then seasonal on Thursday. The warm moist air (high theta e) and lifting from the areas of low pressure put us in a very favorable environment for widespread thunderstorm activity. Some of these storms could turn severe. On Thursday the cold front should pass, shutting of the thunderstorm activity.  

Long term

The cold front will usher in a quick shot of below average temperatures for the day on Friday. The cloudy skies should also slowly clear out of the state as a high moves in. The high pressure should bring about some very nice weather on Saturday with seasonable temperatures and mostly sunny skies.
Steven Fuhrman