Synopsis:
High pressure will move off the coast as a low-pressure system to our west will move north of the region. The state will be in the warm sector of the system and temperatures will be warm for the middle of the week. The low-pressure's associated cold front will stall across the state Thursday and Friday, as well as into the weekend, bringing widespread precipitation. A second system will swiftly make its way from the gulf and provide a chance for mixed precipitation for the end of the weekend and for the beginning of next week.
Short Term: (Tuesday night through Wednesday night)
Tuesday night there will be a slight chance for some light freezing rain or drizzle for extreme northern PA, otherwise cloudy conditions will persist overnight and low temperatures will remain in the 30's for the majority of the state as indicated by the 18Z 12km NAM. As the low pressure and it's associated cold front to our west slowly approaches the region, temperatures will begin to warm for Wednesday, as we will be located in the warm sector with a southeasterly flow. This southeasterly flow could provide enough moisture to produce a few scattered rain showers for higher elevations located in the eastern counties as the moist air ascends the mountains.
Long Term: (Thursday into the weekend)
Temperatures will continue to warm Thursday with high temperatures ranging from the low to mid 50's for northern counties to low 60's for southern PA indicated by the 18Z 12km NAM. The 18Z NAM, as well as the 18Z HI-RES 4km NAM and the 21Z SREF Mean, have the frontal precipitation reaching southeastern portions of the state by 18Z Thursday, but the 18Z GFS is a bit slower with the precipitation not reaching southern counties until 03Z Friday. Pieces of energy will make their way from the southwest and move northeasterly along the stalled cold front across the state beginning Thursday night. This will create bands of precipitation to be oriented from the southwest to the northeast from Thursday night into the weekend, as pieces of energy continue to move northeast along the cold front and bring widespread rain showers across the state. As the stalled cold front finally makes its way off the coast, cold air will move into the state and provide a chance for some snow showers in northwestern counties Friday night as the precipitation exits the state to the southeast. A quick moving system from the gulf will move just west of the state and bring a chance for some mixed precipitation Sunday night through Monday.
No comments:
Post a Comment