Synopsis: A stalled frontal system will remain in the area until late Thursday. As the front pushes offshore, high pressure will move in and dominate until another front makes its way into the region bringing with it unsettled weather and cooler temperatures for later in the weekend.
Short Term: Showers will be present overnight and into Thursday morning due to the location of the right entrance region of the jet stream and the synoptic forcing that will take place. The heaviest of rain looks to fall along the eastern half of the state due to slight warming/convection that will take place. Temperatures will remain near normal or slightly above normal once the high pressure builds in behind the front.
Long Term: High pressure builds late Thursday into Friday bringing in warm air from the south even though the prevailing wind will be from the west. High temperatures for most of the state will be above normal on Friday as another front approaches. As the front enters the region early Saturday morning a band of moderate to heavy rain will form. A possible shortwave will drop to the south bringing in greater height falls over the region on Saturday which could lead to a low pressure forming to the east of the Appalachians. The recently updated models seem to be agreeing with this outlook which means enhanced precip values for central PA on Saturday afternoon. Rainfall amounts could range between half and one inch. As the system exits, Sunday brings fair weather but a cooler air mass will dominate. Expect high temperatures 10-15 F below normal.
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