Apex Weather

St. John Valley weather for Feb. 17-23, 2021

Short-Term Outlook: Wednesday – Friday

High pressure builds in from the Great Lakes/Ohio Valley this Wednesday on breezy northwest winds with partly cloudy skies becoming mostly clear Wednesday night. Fresh snow, lighter winds, and clear skies will allow overnight temperatures fall into the -5 to -15 degrees F range east to west across northern Maine. 

Partly cloudy skies are expected Thursday and Thursday night with increasing clouds early Friday as the next storm system tracks out to sea of the Mid-Atlantic coast with a slight chance for snow / snow showers across the SJV.

Today & Tonight

Mostly cloudy in the morning with a chance for snow showers with decreasing clouds in the afternoon. Chance for snow 40 percent with less than 1 inch additional accumulation.  High near 21 degrees with northwest winds 10 to 15 mph with gusts 25 to 30 mph. Winds become west diminishing to 5 to 10 mph in the afternoon.

Tonight, mostly clear with a low around -12 degrees. West winds 0-5 mph.

Thursday, February 18

Partly cloudy with a high near 17 degreesF with northwest winds 5 to 10 mph.

Thursday night, partly cloudy in the evening with increasing clouds after midnight with a slight chance for snow after midnight. Chance for snow 10 percent. Low near 0 degrees F with northwest winds 0 to 5 mph. 

Friday, February 19

Mostly cloudy with a 30 percent chance for snow, mainly in the afternoon. High near 19 degrees with north/northeast winds 0 to 5 mph.

Friday night, mostly cloudy a chance for snow showers. Chance for snow 30 percent. Low near 8 degrees. North winds 0 to 5 mph.

Medium-Range: Saturday – Tuesday

Snow showers linger across the Valley Saturday. High pressure builds in with partly cloudy to mostly sunny skies Sunday and mostly clear skies Sunday night. Clouds increase Monday as a low pressure system moves towards the region from the Great Lakes. A low is expected to develop off the Mid-Atlantic and and track towards Nova Scotia Tuesday bringing some a chance for snow to the Valley Monday night and Tuesday.

Saturday, February 20

Mostly cloudy with a 20 percent chance for snow showers. High near 20 degrees with northwest winds 10-15 mph.

Saturday night, decreasing clouds with a low near 4 degrees. Northwest winds 5 to 10 mph.

Sunday, February 21

Partly cloudy in the morning then mostly sunny in the afternoon. High near 22 degrees with northwest winds 5 to 10 mph.

Sunday night, mostly clear with a low near 2 degrees. West winds 0 to 5 mph.

Monday, February 22

Partly cloudy with increasing cloudiness in the afternoon. High near 30 degrees with south winds 5 to 10 mph. 

Monday night, mostly cloudy with a 20 percent chance for snow after midnight. Low around 18 degrees with east/southeast winds 0 to 5 mph. 

Tuesday, February 23

Mostly cloudy with a 20 percent chance for snow. High near 31 degrees with northeast winds 0 to 5 mph.

Tuesday night, mostly cloudy with a 30 percent chance for snow. Low near 20 degrees with northeast winds 0 to 5 mph shifting to the northwest 0 to 5 mph.

Regional Long-Range Trends: Wed. Feb. 24 –  Tue. Mar. 2

Above normal temperatures  /  Above 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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