Temperatures have dropped off significantly in the wake of a cold front passage early yesterday morning – It’s nearly 15 to 20 degrees colder from 8 am Thursday to 8 am Today. 9:00 AM temperatures were in the upper 20s and low 30s across the state and daytime highs will not exceed the mid 30s. It’s breezy with a northwest wind gusting to 20 mph at times, but nowhere near as windy as it was yesterday.
A broad trough axis is shifting into the northeastern US. A shortwave rotating in along its base along with the approach of an arctic cold front will provide enough lift for a round of snow showers and squalls to develop late this afternoon and early evening. These will be locally intense, causing sudden and acute reductions in visibilities, and result in quickly developing slippery conditions. The latest HRRR shows a line of squalls moving across the state between 5 and 8 PM.
The HRRR also has great graphical display of the possible localized reductions in visibilities (courtesy of weather.cod.edu):
The core of this weekend’s blast of cold air will move into the region tonight behind an arctic cold front passage. Temperatures will fall off into the teens tonight, and struggle to make it out of the 20s on Saturday.
The weekend will be dry featuring mostly sunny days and clear nights with high pressure building in from the west through Sunday. Favorable radiational cooling conditions Saturday night into Sunday morning will allow temperatures to fall into the upper single digits and lower teens. The airmass will moderate back into the mid 30s by Sunday afternoon, and lower 40s by Monday.
High pressure will shift offshore to the south and east allowing a warm front to approach the region by late Monday. Clouds will increase Monday night with rain showers developing by Tuesday. Another cold front will pass through by Tuesday night into Wednesday with a cooler end to the week.