Synopsis
With last night's cold front past and down to our south, we will continue to see a cooling northerly flow until a shortwave shakes up the air and gives us a shot at some wintry weather this week, followed by zonal flow until the "arctic blast" for next week
Short Term (Now thru Wednesday)
Currently in the state, a vast high pressure cell out in the Midwestern U.S. has set up a mean northerly flow over the state, keeping things cool for the time being. This high will deform into a zonally-oriented surface ridge that will slide in for Tuesday. a stationary front to our south will move further north, creating the wintry weather scenario that will come into play overnight Wednesday. A 500mb trough will start to interact with a low moving up the Appalachians, and the result will be brief intensification that will clip the state with less than 12 hours of snowfall overnight Tuesday (starting around 9z) ending Wednesday afternoon. Forecast sounding imply a small area of wintry mix around Harrisburg, connecting in a line to about 10 miles south of Allentown. Everywhere south and east of the line will be rain, whereas the other side will see about an inch of accumulation. The trough will then help push this system along, allowing for a dryslot from another system to clear out by nightfall. This low will also setup a westerly flow that will give Erie a shot at lake-effect snow for overnight Wednesday
Long Term (Thursday into the weekend)
Not much going on here; a low moving along the U.S. Canada that will be well occluded will wrap dry air around itself, keeping a dry and sunny pattern for Thursday and Friday. This will continue into the weekend as the 500 mb ridge continues to dominate until next week, where a strong trough will bring cold winter weather into the Northeast
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