It's been a split-state weather experience today, with hot and steamy conditions for much of Southern Maine, with muggy but not as hot weather for Eastern and Northern counties, thanks to a frontal boundary which has parked itself across the state. That front serves as a boundary marker separating the two contrasting air masses.
An eastbound front will bring some clouds, showers and thundershowers to our region tomorrow, particularly in the afternoon and evening. That front will be slow to move to our east, so Saturday will feature a pretty unstable air mass, with a chance of some scattered showers visiting, along with a chance of passing thundershowers.
It appears Sunday will be the brightest of our two weekend days.