Snow on the way Monday night into Tuesday, outlook for the week

2/6/2022

Inverted trough to bring a few inches of snow
and a bit of ice for interior areas

An area of low pressure forms off the Delmarva peninsula Monday afternoon and tracks to the northeast. The storm passes just to the southeast of the benchmark 40° N / 70° W point and heads for landfall near Halifax, Nova Scotia. A northern wave of cold taps into the warm of the ocean low and taps into moisture and brings it northwestward into Maine. Unlike typical inverted trough scenarios where the parent low over the ocean is far enough to the southeast to bring flurries or light snow, this one appears to track closer and brings a bit more in the way of precipitation.

Monday 1 PM to Wednesday 7 AM - Southwestern areas can expect precipitation break out in the late afternoon on Monday. There is a chance for some slick spots on the roads less travelled for interior areas for the evening commute from a light wintry mix of freezing rain, sleet, and/or snow. Coastal areas may start off as plain rain and perhaps cool for a period of freezing drizzle or rain Monday night into Tuesday morning.

Precipitation continues to overspread the region and pick up a bit with intensity Monday night into the wee hours of Tuesday. The Tuesday morning commute could be a bit dicey in spots, so plan on extra time to get to where you need to be.

Precipitation ends from southwest to northeast Tuesday afternoon through early Wednesday morning.

The shorelines may see precipitation in the form of freezing drizzle / freezing rain and/or plain rain more than snow.

For those over the interior coastal plain up into the western foothills over to the eastern interior (Fryeburg, L/A, Augusta, Bangor, Airline to Calais) may deal with a bit of ice along with wet snow. The mountains and north appear to escape with more of a powder snow.

While there appears to be little wind to speak of at the onset of the storm, as the storm tracks northeast for Nova Scotia Tuesday afternoon, it begins to intensify as the northern and southern streams merge. For those areas that see snow and ice stick to trees and powerlines, it could become a concern for isolated to spotty power outages Tuesday night into Wednesday morning. The good news is temperatures are expected to rise above freezing for those locations during the day on Wednesday, which should clean up any snow and ice hanging around, and thus reduce the outage threat.

Outlook for the rest of the week

Wednesday 7 AM to Friday 7 PM - Temperatures warm up above freezing across much of the region Wednesday and Thursday, which will help areas clean up from the mess experienced on Friday. A weak wave may generate some snow shower activity along the Quebec border Thursday night. Temperatures cool down a bit for Friday. A clipper system may touch off another round of snow showers to start the weekend.

The normal high and low for Caribou is 22° and 2°. For Portland, 33° and 15°. Temperatures are expected to run above normal through Saturday before cooling down early next week. Interior areas aren't quite done with below zero starts quite yet.

Beware of freezing drizzle!

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- Mike

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