From the WABI-TV5 & CW Forecast Center:
Energy aloft will allow a new surface storm forming off the Mid-Atlantic Coastline to intensify Saturday as it lifts north through New England. The storm will pull a tropical airmass into New England from our southeast and that will allow the rain to fall heavily at times right through Saturday evening, with some parts of our region possibly picking up over 2” by the time the steadier rain tapers off Saturday night and early Sunday. As the powerful storm slowly drifts north into Quebec later Saturday night and Sunday southern parts of Maine will slowly dry out while the north and mountains continue to see precipitation. With colder air filtering into New England on a brisk west breeze lingering rain showers will likely change to snow showers later Saturday night and Sunday over the higher elevations well north and west of the Bangor Region. The brisk west wind will continue to usher a cooler airmass into New England Monday through Thursday.
Tonight: Periods of rain, heavy at times, patchy fog and drizzle, with an east wind gusting to near 20 mph and low temps in the 50s to near 60.
Saturday: Mostly cloudy, with periods of rain, at times heavy, with a brisk southeast wind between 10 and 20 mph and high temps in the upper 50s to mid 60s.
Saturday night: Lingering showers, mixing with wet snow over the higher elevations of Western Maine, with an active west to southwest breeze between 10 and 20 mph and low temps in the mid 30s to mid 40s from west to east.
Sunday: Partly to mostly cloudy, blustery and cooler, with a few scattered rain and snow showers north, with high temps in the 40s to very low 50s.
Monday: Variably cloudy, breezy and cool, with high temps in the 40s to near 50.
Tuesday: Partly cloudy, breezy and cool, with high temps in the 40s.
Wednesday: Partly cloudy and cool, with high temps in the 40s.
WABI-TV5 & CW Meteorologist