St. John Valley weather for Sept. 2-8, 2020
Short-Term Outlook: Wednesday – Friday
A cold front will approach from the west today with a low-pressure area tracking into southwest and central Maine tonight. The combination of system will bring increasing chances for showers late this afternoon and tonight along with some isolated thunderstorms.
Gusty southerly winds are expected this afternoon with some gusts in excess of 40 mph possible. Areas of fog are also possible overnight.
The frontal boundary will stall out over the region Thursday as the low pressure area tracks into New Brunswick; however, precipitation is expected to be light tomorrow. Another cold front will move towards the Valley Thursday night and Friday sweeping the stalled boundary east and allowing high pressure to build in for the bulk of the Labor Day weekend.
Today & Tonight
Partly sunny in the morning then mostly cloudy to overcast with a 20 percent chance for showers in the afternoon. High in the low 70s with south winds 10 to 15 mph with gusts to 30 to 40 mph possible.
Wednesday night, cloudy with an 90 percent chance for showers and slight chance for isolated thunderstorms. Low in the upper 50s/low 60s with south to southwest winds 5 to 10 mph in the evening dropping to 0 to 5 mph after midnight.
Thursday, September 3
Partly cloudy with a 10 percent chance for showers. High in the upper 70s with southwest to south winds 0 to 5 mph.
Thursday night, partly cloudy with a 20 percent chance for showers after midnight. Low in the mid-50s with south winds 0 to 5 mph.
Friday, September 4
Partly cloudy with a 20 percent chance for showers. High in the mid-70s with west winds 10 to 15 mph gusting to 25 mph over higher terrain.
Friday night, partly cloudy to mostly clear with a slight chance for showers. Low in the upper 40s with west winds 0 to 7 mph.
Medium-Range: Saturday – Tuesday
High pressure over the Ohio Valley building in with mostly clear to partly cloudy skies Saturday and Saturday night, though a weak disturbance north of the Valley may produces some scattered/isolated showers Saturday afternoon and evening.
Partly cloudy skies are expected Sunday for Fort Kent, Frenchville, and surrounding locations and partly cloudy skies continue Sunday night with a slight chance for showers as a cold front approaches. Partly cloudy to partly sunny skies with a chance for showers, especially in the afternoon, are expected Labor Day as the cold front moves through, though timing of the front’s passage is uncertain on the forecast models at present.
Saturday, September 5
Partly cloudy with a 20 percent chance for afternoon showers. High in the upper 60s with west winds 8 to 14 mph.
Saturday night, partly cloudy with a 20 percent chance for showers in the evening. Low in the mid-40s. Southwest winds 0 to 7 mph.
Sunday, September 6
Partly cloudy with a 20 percent chance for afternoon showers. High in the low 70s with southwest winds 0 to 7 mph.
Sunday night, partly cloudy with a 20 percent chance for showers. Low in the upper 40s/low 50s with south winds 0 to 7 mph.
Monday, September 7 / US Labor Day
Partly sunny with a 20 percent chance for showers in the afternoon. Southwest winds 0 to 7 mph.
Monday night, partly cloudy with a 40 percent chance for showers. Low in the upper 40s/low 50s with southwest winds 0 to 7 mph.
Tuesday, September 8
Partly sunny with a 20 percent chance for showers. High in the upper 60s with west winds 0 to 7 mph.
Tuesday night, partly-to-mostly cloudy with a slight chance for showers. Low in the low-to-mid-50s with south/southwest winds 0 to 7 mph.
Regional Long-Range Trends: Wed. Sep. 9 – Tue. Sep. 15
Above normal temperatures and slightly above normal precipitation
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.