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St. John Valley weather for April 17-23, 2019

ST. JOHN VALLEY, Maine — High pressure will build across the Valley Wednesday and Wednesday night then move east Thursday. Low pressure near the Great Lakes Thursday will move east and lift a warm front across the region Thursday night into Friday producing rain showers across the region. Plenty of warm, moist air will be drawn into the region through the weekend, so flooding along rivers and streams will be a concern this weekend. Showers continue Saturday and Saturday night. A cold front will cross the region Sunday with showers expected through the day before tapering off Sunday night. The upper trough associated with the system will slowly move across the area Monday into Tuesday, keeping a chance for showers across the Valley. High pressure builds in by midweek.

Daily Weather Summary

Wednesday, April 17
Mostly clear with a high in the middle 40s. Northwest wind 5 to 10 mph. Overnight, mostly clear early then becoming partly cloudy. Low in the mid-20s. Northwest winds shift to the south with winds near calm overnight.

Thursday, April 18
Increasing clouds in the morning with showers likely by the afternoon. High near 50 with south wind increasing to 10 to 20 mph in the afternoon with gusts 25 to 35 mph possible. Chance for precipitation 70 percent with between one and two-tenths inch expected. Overnight, cloudy with a 90 percent chance for showers with between 1/2 and 3/4 inch precipitation possible. Areas of fog possible. Low in the upper 30s with south wind 10 to 15 mph gusting 20 to 25 mph.

Friday, April 19
Cloudy with a 70 percent chance for showers with around two-tenths inch possible. High in the low 60s with southerly wind 5 to 10 mph shifting to the west 0 to 5 mph. Friday night, cloudy with a 90 percent chance for showers. Low in the lower 40s. Northwest wind 0 to 7 mph.

Saturday, April 20
Cloudy with a 90 percent chance for showers. High in the mid-50s with east winds 0 to 7 mph. Saturday night, cloudy with an 80 percent chance for showers. Low in the mid-40s with southeast winds 0 to 7 mph. Precipitation totals between three-quarters to one inch rainfall possible.

Sunday, April 21
Cloudy with a 60 percent chance for showers. High near 60. South winds 8 to14 mph. Sunday night, mostly cloudy with a 20 percent chance for showers. Low in the lower 40s. South wind 0 to 7 mph. Precipitation totals around one-quarter inch possible.

Monday, April 22
Partly sunny with a 20 percent chance for showers. High in the upper 50s. Southwest wind 8 to 14 mph. Monday night, partly clear with a low in the mid-30s. West wind 0 to 7 mph.

Tuesday, April 23
Partly cloudy with a high in the lower 50s. Northwest wind 0 to 7 mph. Chance for afternoon/evening showers 30 percent. Tuesday night, partly cloudy to mostly clear with a low in the lower to middle 30s. 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.

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