From the WABI-TV5 & CW Forecast Center:
An upper level storm will be located near Hudson Bay over the weekend and troughs of low pressure aloft spinning around the upper low will periodically slide east across Northern New England tomorrow and Sunday. The combination of high pressure centered to our southwest and the upper level disturbances swinging east across Northern New England this weekend will keep the skies in our area partly sunny both weekend days, with some scattered showers and storms popping up both days, but mainly across the far north and mountains. The upper level disturbance moving across Maine Saturday will be a little stronger than Sunday’s disturbance and that will cause the showers and storms Saturday to be a bit more widespread across the state.
Monday will be a warm and rather muggy day, with a better chance for some scattered thundershowers later in the evening into Tuesday as a rather strong cold front approaches New England from the west. Cooler and less humid conditions will develop across our area Wednesday as the cold front moves offshore and a northwest breeze usher a fresh airmass into Maine from Central Canada. The cooler than normal conditions across Maine will then likely continue right through the rest of the workweek.
Tonight: Partly to mostly clear, with a light breeze and low temps in the upper 50s to low 60s.
Saturday: Mixed sun and clouds, with a southwest breeze between 5 and 10 mph along with some hit and miss showers and thundershowers, most numerous up north and high temps in the mid 70s to low 80s.
Saturday night: Variably cloudy, with low temps in the mid 50s to low 60s.
Sunday: Partly sunny and warm, with a few scattered showers and thundershowers possible and high temps in the mid 70s to low 80s.
Monday: Partly cloudy, warm and humid, with scattered late day thunderstorms and high temps in the upper 70s to mid 80s.
Tuesday: Variably cloudy, scattered showers and storms likely and high temps in the mid 70s to low 80s.
Wednesday: Partly sunny, breezy and cooler, with high temps in the upper 60s to mid 70s.
WABI-TV5 & CW Meteorologist