St. John Valley weather for Dec. 2-8, 2020
Short-Term Outlook: Wednesday – Friday
Low pressure which brought yesterday’s rain and wind continues to track northwards in Québec while the upper trough associated with the system will slide across the SJV today into tonight.
High pressure centered over the East Coast will build north tonight through Thursday night with party cloudy skies. An upper-level disturbance will move across the Valley Friday into Friday night with mostly cloudy skies and a chance for some scattered snow showers across the area Friday afternoon.
Today & Tonight
Partly sunny today then becoming mostly cloudy this evening with a 20 percent chance for rain/snow showers in the afternoon. Less than 1/10 inch precipitation expected. High near 42 degrees with south winds 9 to 12 mph.
Overnight, mostly cloudy with a 50 percent chance for snow showers in the evening. Precipitation totals less than 1/10 inch and a trace of snowfall. Low near 27 degrees with south/southwest winds 6 to 8 mph.
Thursday, December 3
Partly sunny to partly cloudy with a 10 percent chance for snow showers. High near 34 degrees with southwest winds 8 to 11 mph.
Thursday night, partly cloudy in the evening then becoming mostly cloudy with a low near 27 degrees. Chance for precipitation 10 percent. Southwest winds near 6 mph.
Friday, December 4
Mostly cloudy with a 20 percent chance for snow showers in the afternoon. Precipitation totals less than 1/10 inch. High near 37 degrees with southwest winds 6 to 9 mph.
Friday night, mostly cloudy with a 20 percent chance for snow showers. Low near 25 degrees with southwest winds 0 to 7 mph.
Medium-Range: Saturday – Tuesday
Forecast models are not yet in agreement regarding a strong area of low pressure that is expected to affect Maine this weekend. The eventual track of the low pressure will determine precipitation with a westerly track producing a rain event across the region while a track to the south will bring a chance for snow to the Valley.
The American GFS model is currently not showing a significant event except for Downeast areas. Canadian and German global forecast models indicated a more significant snow event for the SJV. Based on available data, A rain/snow mix is possible Saturday afternoon and night with precipitation changing to all snow Sunday, possibly mixing with some rain Sunday afternoon. Precipitation tapers to snow showers Sunday night with lingering snow showers across the area Monday. Snow showers taper off Monday night with considerable cloudiness expected across the Valley Tuesday giving way to partly cloudy skies Tuesday night.
Saturday, December 5
Mostly cloudy with a 30 percent chance for morning snow showers then a rain/snow mix in the afternoon. High near 37 degrees with north winds 0 to 7 mph.
Saturday night, mostly cloudy with a 50 percent chance for rain/snow showers. Low near 27 degrees with northeast winds 0 to 7 mph.
Sunday, December 6
Mostly cloudy with a 50 percent chance for snow mixing with rain in the afternoon. High near 33 degrees with northeast winds 0 to 7 mph.
Sunday night, mostly cloudy with a 40 percent chance for snow showers. Low near 23 degrees with north winds 0 to 7 mph.
Monday, December 7
Mostly cloudy with a 20 percent chance for snow showers. High near 30 degrees with northwest winds 8 to14 mph.
Monday night, partly cloudy with a 20 percent chance for snow showers. Low near 18 degrees. Northwest winds 0 to 7 mph.
Tuesday, December 8
Partly sunny in the morning then becoming mostly cloudy in the afternoon. Chance for precipitation 10 percent. High near 28 degrees with northwest winds 8 to 14 mph.
Tuesday night, mostly cloudy with a 10 percent chance for precipitation. Low near 18 degrees with west/southwest winds 0 to 7 mph.
Regional Long-Range Trends: Wed. Dec. 9 – Tue. Dec. 15
Above normal temperatures and near 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.