St. John Valley weather for Jan. 23-29, 2019
A high-pressure ridge off the East Coast and an approaching low-pressure system will channel warmer southerly air into the region Wednesday and Thursday. Overrunning snow ahead of the low-pressure system that will track into Canada over the Great Lakes Wednesday evening will lead to around 4 to 5 inches accumulation for most of the Valley. Temperatures will begin rising after midnight Wednesday and climb towards the 40 degree mark by Thursday morning, causing a changeover to rain early Thursday that will continue into the evening hours. A cold front will cross the region Thursday night with colder air moving back into the region and changing precipitation back to snow/snow showers Thursday night.
An Arctic air mass moves in later Friday with some snow showers and possibly a few snow squalls across the region. Arctic air settles in Saturday with partly cloudy skies. Partly sunny skies Sunday give way to increasing clouds later in the day as low pressure in Québec pulls a front towards the region with a chance for snow showers Sunday afternoon and evening and steadier snowfall Monday. High pressure brings diminished clouds Monday night into Tuesday before clouds increase later Tuesday as a cold front slides east from the Great Lakes, bringing a chance for more snow Tuesday night.
Daily Weather Summary
Wednesday, January 23
Cloudy with an 80 percent chance for snow with around 1 inch or so possible by Wednesday evening. Highs in the low 20s with south winds 5 to 10 mph. Tonight, cloudy with a 90 percent chance for snow with around 3 or so inches expected. Lows in the upper 10s. East/southeast winds 0 to 5 mph. Liquid equivalent totals 0.05 to 0.10 inch today and near 0.25 inch tonight.
Thursday, January 24
Cloudy with an 80 percent chance for rain with between 0.25 and 0.50 inch liquid precipitation. Highs in the upper 30s to near 40 degrees F with south winds near 5 mph. Areas of fog possible due to snow melt. Thursday night, mostly cloudy with a 90 percent chance for snow tapering to snow showers with 1 to 2 inches accumulation possible. Liquid equivalent totals near 0.10 inch. Lows in the mid-10s. West/northwest winds 5 to 10 mph.
Friday, January 25
Partly sunny with a 40 percent chance for snow showers. Highs in the mid-20s with west/southwest winds 5 to 10 mph. Friday night, partly clear with a 40 percent chance for snow showers. Lows in the 0 to 5 below range. Light west winds.
Saturday, January 26
Partly cloudy with a slight chance for morning snow showers. Highs near 10 above with west winds 8 to 14 mph. Saturday night, partly cloudy with lows near 10 below. Chance for snow 20 percent. South wind 0 to 7 mph.
Sunday, January 27
Partly sunny with a 40 percent chance for snow showers mainly in the afternoon and evening. Highs near 20 with southeast winds 8 to 14 mph. Sunday night, mostly cloudy with lows near 8 above. Chance for snow 50 percent. Light southeast wind 0 to 7 mph.
Monday, January 28
Cloudy/mostly cloudy with a 50 percent chance for snow tapering to snow showers in the afternoon. Highs in the mid-20s with light southwest winds. Monday night, partly clear with a 30 percent chance for snow showers. Lows 0 to 5 above. West wind 0 to 7 mph.
Tuesday, January 29
Becoming mostly cloudy with a 50 percent chance for snow in the evening. Highs in the low 20s. Southeast winds 0 to 7 mph. Tuesday night, mostly cloudy with lows near 10. Chance for precipitation 50 percent. East/northeast winds 0 to 7 mph.
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.