Apex Weather

St. John Valley weather for September 4-10, 2019

ST. JOHN VALLEY, Maine — A warm front is lifting across the Valley this morning with showers across the area. A cold front will move through later this afternoon with showers and thunderstorms with a marginal risk for isolated strong to severe storms possible across the SJV. Following frontal passage tonight, skies will clear as high centered over the Great Lakes begins to slide east towards the region over the next couple of days. A weak cold front will move through tomorrow with mostly dry conditions and some increased cloudiness allowing cooler Canadian air to spill into the region creating a chance for some frost across mainly the Allagash and North Woods tomorrow night. 

Friday will remain mostly clear and mild across the region with temperatures a few degrees below normal for this time of year. High pressure will move away from the region later Friday with some increased cloudiness as Dorian tracks to the south of Nova Scotia producing increased high clouds across the Valley. A weak trough approaches later Saturday and crosses the region Sunday with a chance for some scattered shower activity under mostly cloudy to partly sunny skies. High pressure builds down from the northwest Monday and Tuesday bringing fair weather to the Valley through midweek.

Daily Weather Summary 

Wednesday, September 4
Cloudy/mostly cloudy with a 90 percent chance for showers and a chance for some afternoon thunderstorms with isolated strong to severe storms possible. Rainfall totals between 1/4 and 1/2 inch with higher totals possible in any storms. High in the upper 60s with south 10 to 15 mph gusting to 25 mph, especially over higher terrain. Overnight, decreasing clouds with a 70 percent chance for showers through midnight with less than 1/10 inch expected. After midnight, skies become mostly clear with a low in the middle 40s with west winds around 10 mph overnight with gusts to around 20 mph possible, especially across higher ground.

Thursday, September 5
Partly cloudy to mostly clear with a high in the middle 60s. West/northwest winds around 10 mph gusting 15 to 20 mph. Tomorrow night, mostly clear with a low in the mid-to-upper 30s in eastern/central portions of the SJV and the middle along with some lower 30s in the Allagash and North Woods. Northwest winds 0 to 5 mph.

Friday, September 6
Mostly clear with a high in the lower 60s. North/northwest winds near 5 mph with gusts in the 5 to 10 mph range possible. Friday night, partly cloudy with a slight chance for showers after midnight. Low in the lower 40s with northeast winds 0 to 5 mph.

Saturday, September 7
Partly cloudy to partly sunny with a 30 percent chance for showers. High in the lower 60s with east winds 0 to 5 mph. Saturday night, mostly cloudy with a 40 percent chance for showers. Lows in the middle 40s with north winds 0 to 5 mph.

Sunday, September 8
Mostly cloudy with a 30 percent chance for showers. High in the low 60s with west winds 0 to 5 mph. Sunday night, partly clear with a low in the  middle 40s. Northwest winds 0 to 5 mph.

Monday, September 9
Partly cloudy with a high in the lower 60s. Northwest winds 0 to 5 mph. Monday night, partly cloudy with a low in the lower 40s. Northwest winds 0 to 5 mph.

Tuesday, September 10
Partly cloudy with a high in the middle 60s. Tuesday night, partly cloudy with a low in the lower 40s. Northwest winds 0 to 5 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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