Synopsis: A weak weather system will move by tonight and tomorrow bringing scattered rain showers throughout the commonwealth. Conditions will be mild until Friday when a strong cold front will push through the region. Periods of light and moderate rainfall will accompany the initial warm front. Gusty winds and much cooler conditions will be apparent in the wake of the front. Lake effect and upslope snow will fire across the northern ridges. Another period of moderation is expected earlier next week as a ridge builds into the area.
Short Term: Two areas of precipitation will move near the region tonight. A warm front will slide across the northern portions of the commonwealth bringing rain showers with snow showers mixing during the late night hours. Across the entire state, mid and lower levels clouds will be dominant and keep the temperatures generally near or above freezing. This should reduce chances of accumulation in areas that see scattered snow showers. A weak and short-lived ridge will build into the commonwealth tomorrow allowing for some periods of sunshine to break through. Mild conditions will again be widespread and temperatures should range from mid 40s to mid 50s.
Long term: On Friday, a strong low pressure system will pass north of Pennsylvania bringing widespread light and moderate rain. The precipitation associated with the initial warm front will bring the heaviest precip accumulations. As the cold front pushes through overnight Friday, scattered rain/snow showers may follow. Gusty winds will also accompany the cold front with gusts near wind advisory criteria. Look for lake effect snows and upslope snow showers to impact the northwestern ridges of the state. Much cooler conditions will follow on Saturday as the clouds clear up and snow showers come to an end. Another ridge will move into the region Sunday and into the beginning of the week. This will allow for another round of moderation early next week. Both the 12Z GFS and 12Z ECMWF have a storm system impacting the eastern half of the country later next week. The ECMWF is currently showing a coastal storm while the GFS hints at a midwest storm. Not much consistency between runs, however it is definitely something to keep on the "radar".
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