Synopsis...
A persistent northwesterly flow will occur across the state for the next couple of days, with high cloudiness occurring for most of this period keeping temperatures cooler during the day and a little warmer at night. As the weekend approaches, a high pressure ridge sets up just southeast of the area with an approaching front associated with the remnants of Hermine.
Short range...
1000mb low pressure system just northeast of Maine sticks around for the next day or so creating a northwest flow over the state of Pennsylvania for the next 48 hours or so. Raw data NAM, NAMMOS, and GFSMOS are all in good agreement on highs in the mid-60's for much of the state for the next couple days. Raw GFS was a tad cooler for this period with highs in the low 60's in general. 700mb RH values are relatively low, so low-mid level clouds will be tough to come by, but a solid layer of high clouds should persist for at least the next 24 hours keeping temps in the low to mid 60's for highs.
Longer range...
On Saturday, both the WRF and GFS show a high pressure system build over northeastern Virginia/Delaware, creating a southerly flow for much of the region during the day. This should increase temperatures 5-10 degrees Fahrenheit higher than the previous few days ahead of the approaching front from what remains of Hermine. There is decent agreement between models of precipitation approaching the region from around 0z - 6z Sunday and exiting the region around 18z - 0z Monday across eastern portions of the area. QPF amounts are between .25 - .50 inches for western - central portions of the state while eastern zones may receive a little less. HPC QPF forecasts are in agreement with these values. After the front passes through, sunny skies will prevail with temperatures rebounding into the mid 70's.
Forecaster: Kyle Imhoff
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