From the WABI-TV5 & CW Forecast Center:
A small bubble of high pressure centered just to the north of Maine brought partly sunny skies and mild temps to our region today. As the high over southern Quebec moves east tonight and early tomorrow a trough of low pressure will begin to approach our region. The upper level trough will keep skies partly to mostly cloudy Wednesday and a few showers could develop here later in the day as moisture slides north into Eastern New England from just off the Mid-Atlantic Coastline. A storm passing east just to the north of New England Thursday will pull a cold front through our region. The front will bring a few periods of showers to Maine later tomorrow night and a portion of Thursday.
The cold front that pushes offshore Thursday will stall just to our east Thursday night. Energy aloft moving east through the Ohio River Valley Thursday night will cause a new storm to develop just to our south by Friday morning. This new storm will slide northeast along the stalled front in the Gulf of Maine Friday morning and bring another round of showers to the Pine Tree State as we end the workweek. A series of troughs aloft sliding through the Northeast this weekend and early next week will gradually usher cooler and cooler air into Maine, with temps falling to below normal levels by early next week.
Tonight: Partly to mostly cloudy, with low temps in the mid to upper 40s.
Wednesday: Clouds and limited sunshine, few widely scattered showers possible and high temps in the upper 50s to mid 60s.
Thursday: Mostly cloudy, with a period of showers likely and high temps in the upper 50s to mid 60s.
Friday: Mostly cloudy, with scattered showers likely and high temps in the upper 50s to low 60s.
Saturday: Partly cloudy and cooler, with high temps in the 50s to very low 60s.
Sunday: Variably cloudy, with a few scattered showers possible, breezy and cooler, with high temps in the upper 40s and 50s.
WABI-TV5 & CW Meteorologist