Heat and humidity still there but cooler weather ahead – NBC Boston


Severe thunderstorm warnings were in effect Monday afternoon for parts of Maine and northern New Hampshire, but have since expired.

Click here to view active severe weather alerts.

The end of the heat and humidity is in sight, but New England still has a few days to go.

Boston broke another heat record on Monday, hitting 97 degrees at 1 p.m. The old record of 96 was set in 1983.

A well-defined frontal boundary separating the cooler Canadian air from the heat and humidity in place in the eastern half of the United States produces a well-defined line of showers and thunderstorms, which subside very slowly in New England on Monday and Tuesday, opening the door to this Canadian air which will be well in place by the middle of the week.

Part of New England is already seeing the change to cooler air. Northern Maine finds rain Monday and temperatures that will hover in the 60s throughout the day, and while the rest of northern New England is still warm and humid, the slowly subsiding front south will bring clusters of rain and thunder to the north of the country. From Monday afternoon to night.

This same cold front will cross the rest of New England on Tuesday, increasing our cloud cover but also increasing our chance of thunderstorms as cooler air reduces heat and abundant humidity, with one more day Tuesday until into the 90s and pushing 100 degrees in a few places, with thick, humid air producing a heat index above 100 degrees, again, for some southern New England communities.

The entire state of Mass. is under some sort of drought status, raising concerns about fire issues.

When scattered to widespread thunderstorms develop in central and southern New England, they feed on the heat and humidity to produce torrential downpours, lightning and most likely pockets of destructive wind from the afternoon to evening as the storms migrate from north to south. in central and southern New England.

A whole new wind direction, from the north and northeast, will follow the passage of the cold front, providing the new cooler and less humid air that will grip New England through the end of the week.

Because the change is so dramatic – and doesn’t happen all at once at all levels of the atmosphere, the heat and humidity holding out a bit longer aloft and continuing to fight against the surge of cool – showers are likely to appear Wednesday and Thursday in New England, especially in southern New England.

On Friday, the chance of showers is not zero, but certainly begins to diminish as drier air settles in at all levels of the atmosphere and this new air will ensure a delicious weekend, in looking great with clear skies and feeling great with high temperatures in the 70s and 80s.

Heat and humidity will slowly recover next week, but are not expected to reach the extreme levels of the past few days in our exclusive 10-day forecast from First Alert.


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