From the WABI-TV5 & CW Forecast Center:
High pressure briefly building along the Mid-Atlantic coastline will bring a southwest breeze to Maine Saturday. The southwest wind will allow temps reach above freezing for the first time in about three weeks across much of our region. Skies on Saturday will average out partly sunny, with the bulk of the clouds being found across northern parts of Maine. A weak disturbance aloft will bring scattered flurries and snow showers to the north and mountains Saturday afternoon and night.
A storm sliding east across southeastern Canada Saturday night will drag a cold front across Maine later at night into early Sunday morning. Colder air will begin to seep back into the Pine Tree State from north to south Sunday, with highs in a wide range as southern regions climb above freezing while northernmost Maine holds in the high single numbers and teens.
A new storm developing over the Southeastern States later Saturday will then move up the Eastern Seaboard Sunday and Sunday night before sliding along the east coast of Nova Scotia Monday morning. The exact track of this new storm will determine how much precipitation we receive across our region later Sunday into early Monday and whether it falls as rain, snow or a mix. At this point in time it appears the coastline and southern parts of the state will see a mixture of snow, rain and ice, while from the Augusta and Bangor regions on north and west most of the precipitation will fall as snow, with maybe a brief period of sleet and freezing rain mixing in. This storm will be a fast mover and by daybreak on Monday most of the precipitation will have come to an end except over the mountains and far north. A few to several new inches of snow will likely accumulate across our area as the storm slides through the Gulf of Maine.
Behind the storm a northwest breeze will usher a seasonably cold airmass into New England for Monday. An arctic front will drop southeast across New England Monday night and that will help usher a bitterly cold airmass into New England for the last day of 2013 and the first few days of 2014. High temperatures on Tuesday will likely hold in the single numbers to lower teens, with even colder conditions moving into Maine for Wednesday and Thursday.
Tonight: Partly cloudy, with low temps in the single numbers north to low to mid teens south.
Saturday: Partly sunny, with mountain snow showers and high temps in the upper 20s to upper 30s from north to south.
Sunday: Mostly cloudy, with late day snow and mixed precipitation likely and high temps in the upper teens north to mid 30s south.
Monday: Partly to mostly cloudy, with early snow possible and high temps in the mid 20s to low 30s.
Tuesday: Partly sunny, blustery and very cold, with high temps in the single digits to mid teens.
Wednesday: Partly cloudy, breezy and frigid, with high temps near zero north and single digits south.
WABI-TV5 & CW Meteorologist