5 maps detailing Monday’s ‘excessive heat’ and ‘severe’ thunderstorms

 —John Tlumacki / The Boston Globe

Parts of New England will see excessive heat and the possibility of severe thunderstorms on Monday, meteorologists warn.

“It’s gonna be a scorcha!” the National Weather Service wrote on Facebook.

With the heat and humidity pushing the temperatures between 95 and 103 degrees across Massachusetts, the service has posted a heat advisory for Greater Boston and the part of the Connecticut River Valley, which is in effect until 7 p.m.

Service meteorologists are also cautioning Bay State residents that severe thunderstorms are possible during the afternoon and evening.

“A cold front approaching from the west may result in a few strong thunderstorms this afternoon and evening… mainly across interior southern New England,” the service said. “A much nicer day is on tap for Tuesday behind the cold front with plenty of sunshine and much lower humidity.”


The forecast prompted the Massachusetts Emergency Management Agency to remind residents to protect themselves from heat-related injuries. Check with local authorities or call 2-1-1 to find nearby cooling centers or shelters. More information is available at MEMA’s website

Here’s what else you need to know about today’s weather.

The heat:

Several Massachusetts schools have already canceled classes or planned for early dismissal due to Monday’s forecast.

“Our first taste of excessive heat as heat indices will range from 95-103°F,” National Weather Service meteorologists wrote of Monday’s temperatures.

The service is forecasting that Boston and other locales across the state could see temperatures in the mid-to-upper 90s Monday afternoon, with heat indices pushing over 100 degrees.

The thunderstorms:

The service warns that strong-to-severe thunderstorms sweeping into the region could impact evening commuters.

The thunderstorms are expected to develop in northern and western parts of Massachusetts by this afternoon and sweep the southeastern part of the state through the evening.

“Looking at storm development beginning shortly after noon and continuing through early evening; with any storms, [there’s] the threat of strong-to-damaging winds, frequent lightning, and/or excessive rainfall,” meteorologists advised.

According to the seven day forecast for Boston, the chance of rain and thunderstorms is mainly between midnight and 5 a.m. on Tuesday.

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