From the WABI-TV5 & CW Forecast Center:
The ridge of high pressure that has produced the mostly sunny and warm weather the past several days will continue to bring sunshine to our region today. Humidity levels will continue to climb across the Northeast today as the high slowly drifts east near Bermuda. The southwest breeze on the backside of the high will continue to transport muggy air into New England right through Wednesday. The south to southwest breeze the next couple of days will keep the temperatures running above normal in our region as highs reach the 80s to low 90s inland but hold in the upper 70s to low 80s along the immediate coastline. There may be an isolated thundershower or two mainly over the western mountains today but otherwise our region should remain rain free.
A slowly approaching cold front will interact with the muggy and rather unstable airmass over New England Wednesday and that will lead to an increased threat of thunderstorms popping up during the day, with western portions of Maine the mostly likely region to see the storms develop. The slow moving front will gradually cross New England later Wednesday night through early Friday and that will lead to an increasing risk of showers and storms forming throughout the Pine Tree State. Some of the storm could become strong to severe as the cold front slips across our area.
The front will gradually push offshore on the fourth and the showers will tend to taper off from west to east. Cooler, drier and less humid air will filter into Maine on a northwest breeze once the cold front slips offshore. High pressure approaching New England from the west will likely bring brighter skies to Maine beginning later Friday or Saturday. The high should bring fair and seasonably mild weather to our region Sunday. The only question mark in the late week and weekend forecast is the possibility of a tropical type system developing off the Southeast U.S. Coastline. Most of the computer models develop the storm and then track it near the Mid-Atlantic Coastline later Thursday and Friday, but then move well to our southeast as we head into the weekend and thus spare our region any significant impacts. We will keep you posted on any projected track changes.
Today: Mostly to partly sunny and muggy, with isolated thunderstorms possible later in the day and high temps in the 80s to very low 90s inland and near 80 along the coastline.
Wednesday: Variably cloudy, and muggy, with showers and thundershowers likely and high temps in the upper 70s and 80s.
Thursday: Muggy, with showers and storms likely and high temps in the mid 70s to low 80s.
Friday: Partly sunny, with a few showers possible and becoming less humid, with high temps in the 70s to near 80.
Saturday: Partly sunny, with high temps in the 70s to near 80.
WABI-TV5 & CW Meteorologist