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St. John Valley weather for Dec. 22-28, 2021

Three-day outlook: Wednesday-Friday

An area of low pressure tracking east across Québec and another low pressure off the East Coast of the US will interact as the day progresses spreading snow across the region. The Atlantic low will eventually absorb the Québec low as it moves into the Maritimes and the Atlantic low tracks east. 

A surface low around the Bay of Fundy may form later today and track into the Maritimes as the various systems move east. While some mixed precipitation is expected as far north as Houlton/Mars Hill, all snow is expected from Caribou north. Presently, snowfall totals in the 8-12-inch range are expected for areas roughly east of Highway 11 with 6-8 inches in St. Francis/Allagash/Dickey, and 4-6-inches along the western border of the County.

The Atlantic low will deepen while high pressure builds in from the west creating a strong pressure gradient producing gusty west/northwest winds Overnight into Thursday afternoon creating areas of blowing snow through Thursday afternoon. 

As the Atlantic low moves away and high pressure takes over, winds will subside Thursday night as very cold Arctic air is drawn into the region. With light winds, clear skies, and fresh snow pack, overnight lows will be in the -5 range in the east to -15 degrees in the west across northern Maine. Wind chills may be as low as 25 below Thursday night.

Friday will be mostly sunny, dry, and cold with highs only in the low teens at best with overnight lows falling back towards zero Friday night.

Today and Tonight  

Cloudy with a 100 percent chance for snow. Precipitation totals in the 0.50 to 0.75-inch range with snowfall totals 5-9 inches in Fort Kent and vicinity. High near 23 degrees. East winds at 4-5 mph.

Tonight, mostly cloudy early then decreasing clouds overnight with a 70 percent chance for snow ending in the early evening. Precipitation totals in the 0.01 to 0.09-inch range with snowfall totals around 1-3 inches possible. Low near 10 degrees. Northwest winds increasing to 10-15 mph with gusts to around 25 mph overnight. 

Thursday, Dec. 23

Mostly clear and blustery with areas of blowing snow possible. High near 12 degrees. Northwest winds 15-20 mph gusting 30-35 mph.

Thursday night, partly cloudy with a 5 percent chance for snow showers. Low near -10 degrees. West winds 6-9 mph. 

Friday, Dec. 24 / Christmas Eve

Mostly clear with a high near 10 degrees. West winds 5-10 mph.

Friday night, mostly clear with a 5 percent chance for snow showers. Low near 1 degrees. West winds 8-14 mph.

Four- to seven-day outlook: Saturday-Tuesday

High pressure will build into the region for the period with mostly clear to partly cloudy skies, breezy, and cold conditions. A disturbance may bring some snow early Tuesday; however, model consistency is not high at this time.

Saturday, Dec. 25 / Christmas Day

Mostly clear with a 5 percent chance for snow showers. High around 20 degrees with northwest winds 8-14 mph.

Saturday night, mostly clear early then becoming partly cloudy with a 5 percent chance for snow showers. Low near 9 degrees. Northwest winds 0-7 mph.

Sunday, Dec. 26 / Boxing Day

Mostly cloudy with a 5 percent chance for snow showers. High around 24 degrees. Northwest winds 8-14 mph.

Sunday night, partly cloudy with a 5 percent chance for snow showers. Low around 13 degrees. Northwest winds 8-14 mph.

Monday, Dec. 27

Partly cloudy with a 5 percent chance for snow showers. High around 25 degrees. Northwest winds 8-14 mph.

Monday night, partly cloudy with a 20 percent chance for snow. Low near 15 degrees. Northwest winds 0-7 mph.

Tuesday, Dec. 28

Partly sunny with a 10 percent chance for snow. High near 28 degrees with northwest winds 8-14 mph.

Tuesday night, mostly cloudy with a 20 percent chance for snow. Low near 15 degrees. Northwest winds 0-7 mph.

Eight- to 14-day trends: Wednesday, Dec. 29-Tuesday, Jan. 4
Near normal temperatures / Below normal precipitation

Note: Computer model precision diminishes the further into the week the forecast projects. Check the Fiddlehead Focus for weather updates with more current information.

The Week Ahead is the work of UMFK Professor Joseph E. Becker based on personal weather station data, various computer forecast models, and information that the National Weather Service, NOAA, and other weather resources provide.

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