Today will feature hot, humid, and stormy weather as a tropical airmass continues to move in from the southwest. Just like yesterday, we’ll start the day with marine stratus and fog especially along the Maine coast. Stratus and fog will burn off from west to east during the next few hours, becoming confined to the immediate shoreline by noon. If you’re south and east of Route 1, you’ll enjoy a cool day in the marine layer with mostly cloudy skies and high temps in the mid 50s to low 60s. To the west though, it’ll be friggin hot bub. Low to mid 90s are in store for New Hampshire with only marginally cooler air across interior Maine (mid to high 80s). Dew points will surge towards 70 especially in Maine (the heat will be *a little* drier in NH).
The combination of high temps and sultry humidity will provide ample fuel for thunderstorms this afternoon. What we’ll largely be missing is forcing for storms to get going in the first place. That should arrive by mid afternoon as a weak pre-frontal trough interacts with the mountains. Look for showers and storms to go up along and north of the Route 2 corridor by 2-3 PM before moving slowly east-southeast. The atmosphere isn’t nearly as volatile as it was yesterday, but damaging winds and small hail are possible with today’s storms and a tornado can’t be ruled out in the more northern mountains (maybe the moose will report if there’s any damage).
The cold front ultimately responsible for this miserable hot air will approach the region from the west around sunset. A line of showers and thunderstorms from VT/NY will comprise its vanguard, though instability will be waning after sunset and severe weather is less likely with this round of activity. Still, for the coast and southern foothills that are likely to miss out on the early afternoon storms, the frontal line will provide the better shot for some needed rain and perhaps a rumble or two of thunder.
Cooler and drier air will pour into the region behind this front overnight.