Eye on the sky day
A cold front will pass through the region on Saturday to sweep the heat and humidity out of the region. With the dew point forecast in the 70s for a good chunk of the coastal plain and moisture being pumped in ahead of the front, this presents the best severe storm threat of the summer thus far for the state.
There is the risk for an isolated shower or thunderstorm Saturday morning, but the main event appears to be late morning for the Allagash region and afternoon for the rest of the state. Damaging wind is the main threat. Given the high humidity level, flash flood potential downpours and hydroplaning on the highways is of concern. Some areas could see 1-2"+ of localized rainfall in a short period of time. With the intrusion of cold air aloft, there is large hail potential with the well organized storms.
The big question as always is if the storms will hold together to reach the shorelines. Given the projected track of the frontal boundary, the coastline has a fair shot at seeing some action.
Temperatures will be a bit cooler in theory compared to Friday. I say "in theory" as the heat index, factoring in the uncomfortable humidity levels will make it feel like the mid to upper 90s in areas away from the coast.
If you are headed to the lake or ocean beaches to seek relief from the heat, keep your eyes and ears open for storms, and prepare to take action once the threat for storms occurs. Seek shelter in a safe building, and stay away from windows.
Sugarloaf NOAA Weather Radio transmitter
Eight year forecaster.