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St. John Valley Weather for March 20-26, 2019

High pressure will move into the Atlantic Wednesday with return flow producing moderating temperatures across the region. Clouds will increase as a low pressure system swings down from northwestern Canada and another low pressure slides up the East Coast towards the Gulf of Maine. Current models show these two systems phasing together into a strong Gulf low that will produce widespread precipitation. Precipitation begins as rain, transitions to snow Thursday night as temperatures cool to freezing, then changes back to rain Friday as temperatures warm up.

Precipitation continues into Friday night changing to a wintry mix as colder air wraps around behind the system. Snow showers linger across the Valley Saturday. Snow showers linger into Saturday afternoon/evening under cloudy skies. High pressure builds in Saturday into Sunday followed by a cold front with a slight chance for snow showers Sunday night and Monday. High pressure then dominates the Valley’s weather through Wednesday with partly cloudy skies and breezy west/northwest winds.

Daily Weather Summary

Wednesday, March 20 / Astronomical Spring begins at 5:58 pm
Partly cloudy this morning then mostly cloudy this afternoon and evening. High in the upper 30s with southwest wind 5 to 10 mph. Overnight, mostly cloudy with a low in the mid-20s. Southwest wind 5 to 10 mph shifting to the south after midnight.

Thursday, March 21
Cloudy with a 20 percent chance for rain in the evening. Highs in the mid-40s with south wind 5 to 10 mph. Thursday night, cloudy with a 90 percent chance for rain changing to snow with 2-3 inches possible overnight. Liquid equivalent totals between one and two-tenths inch. Lows in the lower 30s with south/southeast wind 5 to 10 mph.

Friday, March 22
Cloudy with a 100 percent chance for precipitation. Rain/snow mix early changing to all rain through the evening. Precipitation totals around one-half inch. Highs near 40. Overnight, cloudy with a 90% chance for rain/snow mix. Lows in the upper 20s with north wind 0 to 7 mph.

Saturday, March 23
Cloudy with a 60 percent chance for snow showers. Highs in the mid-30s with north wind 8 to 14 mph. Saturday night, mostly cloudy with lows near 20. Northwest wind 8 to 14 mph.

Sunday, March 24
Partly cloudy with highs in the upper 30s. West wind 8 to 14 mph. Sunday night, partly cloudy with lows near 10 and a 20 percent chance for snow showers. Northwest wind 0 to 7 mph.

Monday, March 25
Partly cloudy with a 20 percent chance for snow showers. Highs in the mid-20s with northwest wind 8 to 14 mph. Monday night, partly cloudy with lows near 5 above. Northwest wind 0 to 7 mph.

Tuesday, March 26
Partly cloudy with highs in the mid-20s. West wind 8 to 14 mph. Tuesday night, partly cloudy with lows near 5 above. West 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.

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