St. John Valley weather for Feb. 20-26, 2019
High pressure which brought the Valley several days of dry weather will crest over the region Wednesday afternoon and move east into the Atlantic Wednesday night. Low pressure near the Great Lakes today will move east tonight, drawing an occluded front towards the region. Snow is expected to start early Thursday morning and continue through the afternoon hours before tapering to snow showers Thursday evening, with precipitation winding down around midnight. High pressure builds in for Friday and Saturday with partly cloudy skies across the region.
High pressure remains over the region Saturday with partly cloudy skies. Clouds increase Saturday night with an increasing chance for snow by Sunday morning as low pressure moves east from the Great Lakes. Snow is expected Sunday and Monday with a near 100 percent chance. Current model estimates indicate snowfall amounts in the 8 to 12 inch range. Snow showers Monday night will taper off by early Tuesday with partly cloudy skies expected.
Daily Weather Summary
Wednesday, February 20
Mostly clear skies through the afternoon with highs near 15. Northwest wind 5 to 10 mph shifting to the west southwest this afternoon 0 to 5 mph. Tonight, increasing clouds with a 90 percent chance for snow with precipitation starting early Thursday. Accumulations of around 1 inch with liquid equivalent between 0.05 and 0.10 inch. Lows around -1. Southeast wind near calm increasing to 5 to 10 mph after midnight.
Thursday, February 21
Cloudy with a 100 percent chance for snow with 4 to 5 inches expected (liquid equivalent precipitation between 0.25 and 0.30 inch). Highs in the low-to-mid-20s with southeast wind 5 to 15 mph with gusts to 25, mainly over higher terrain. Thursday night, mostly cloudy in the evening then partly clear after midnight. 40 percent chance for snow showers through midnight with liquid equivalent around 0.02 inch. Lows near 10° with northwest wind 5 to 10 mph.
Friday, February 22
Partly sunny/cloudy with highs in the mid-20s. Northwest wind 5 to 10 mph. Friday night, partly cloudy with light northwest winds. Lows in the 0 to 5 above range.
Saturday, February 23
Partly cloudy with highs in the mid-20s. West winds 0 to 7 mph. Saturday night, increasing clouds with lows near 10. South wind 0 to 7 mph.
Sunday, February 24
Mostly cloudy to overcast with a 100 percent chance for snow. Highs in the upper 20s with southeast wind 8 to 14 mph. Sunday night, cloudy with a 90 percent chance for snow. Lows in the upper teens with east winds 0 to 7 mph.
Monday, February 25
Cloudy with a 60 percent chance for snow. Highs in the mid-20s with north winds 0 to 7 mph. Monday night, mostly cloudy with lows 0 to 5 above. 30 percent chance for snow showers. Northwest wind 8 to 14 mph.
Tuesday, February 26
Mostly cloudy early then partly cloudy later. Highs near 15. Northwest wind 8 to 14 mph. Tuesday night, increasing clouds with 40 percent chance for snow showers. Lows near -5. Northwest wind 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.