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Thunderstorms roll towards Boston

A line of thunderstorms is rolling east across the state this afternoon and rain could begin falling in Boston’s western suburbs within the hour, forecasters say.

National Weather Service radar showed the storms moving past I-495 towards the Boston area at about 6 p.m.

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Accuweather.com predicted rain will begin shortly before 7 p.m. in Framingham and reach Boston shortly after 7 p.m.

The mercury at Logan International Airport in Boston reached 90 at 1:39 p.m. today, the National Weather Service said, the first time it’s been that hot since July 23. But cooler temperatures are expected to return Thursday.

Any thunderstorm could bring heavy rain and gusty winds. But weather service meteorologist Kim Buttrick said forecasters were only expecting “low-end thunderstorms,” or, in other words, nothing too severe.

Thursday will feature sun and temperatures in the upper 70s — and that weather will carry through the start of the holiday weekend.

The excellent beach weather comes with a risk, though.

Hurricane Cristobal is churning up the Atlantic Ocean, causing rough surf and a high likelihood of rip currents on south and south-southeast facing beaches, Buttrick said.

“There could be some effects as early as today [Wednesday], but the greatest risk is going to be Thursday,” she said. Residual effects are possible through Friday as well.

Friday and Saturday are expected to be sunny, with high temperatures in the mid- and upper 70s, respectively.

By Sunday, there could be widely scattered showers, similar to those expected this afternoon. Scattered thunderstorms could pop up overnight, but “it’s nothing concrete,” Buttrick said. Mostly, Sunday and Labor Day will just be overcast, with temperatures in the low 80s or high 70s.

Kiera Blessing can be reached at kiera.blessing@globe.com.
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