A fresh round of Arctic air settled in last night, setting the table for a messy mix today and tonight across Northern New England as the first of two storm systems rolls through.
Cold air is heavier than warm air, it hugs the ground and is tough to dislodge. Precipitation will begin during the middle of the morning and it will start as rain for the coastal plain and snow for the interior. With sub-freezing temps and surfaces still hanging around, that rain may freeze on contact so please be cautious driving and walking during the middle of the day.
As the storm strengthens this evening, the precipitation will get much heavier. At this point, temps will have warmed sufficiently above freezing and the snow zone will retreat to a line roughly from Danforth to Millinocket to Greenville to Jackman. Whether it's the heavy snow or the heavy rain, the evening commute will be a very slow one. A solid thumping of snow is expected for Northern Maine before it tapers off very early tomorrow morning.
There won't be much of a break between the two storms, the second will arrive late tomorrow. Like it's predecessor, it will take a similar track and have a similar thermal profile. The coastline will see primarily rain, the interior a quick mix to rain and the north will remain all snow. In fact, the all snow zone may pick up another 6+" and combined snow amounts from the two storms by the end of the week may top a foot!
Following the second storm, the pattern becomes tranquil through the weekend. But the action may come roaring back early next week with a larger, juicier Nor'easter type storm being suggested by some of the computer guidance...we'll see!
Todd Gutner - https://twitter.com/ToddWCSH
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