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Storm bringing heavy rain, flooding, and hazardous winds to Massachusetts

The risk of excessive rainfall has risen in the storm that is expected to continue into Monday.NWS

Damaging winds, heavy rain, flooding, and hazardous seas are expected to continue in Massachusetts into Monday morning as a storm rolls through New England, according to the National Weather Service.

Rain drenched the Boston area Sunday afternoon, with a south wind blowing up to 17 miles per hour during the day and gusts blowing as high as 45 miles per hour Sunday night.

The inclement weather is expected to make the Monday morning commute difficult, as rain will pelt Boston before noon, when it will start waning, Joe Dellicarpini, a meteorologist with the National Weather Service, said in a phone interview.

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Between 1 and 2 inches of rain were forecast for Sunday evening, with patchy fog beginning after 3 p.m., according to the weather service. The storm made its way through Rhode Island Sunday morning.

“For those folks whose basements typically are prone to flooding, this is probably going to be an issue for that. It’s a good idea today to make sure the sump pumps are working and make sure there aren’t any valuables in places that could flood,” Dellicarpini said.

Just before 2 p.m., the National Weather Service upgraded portions of southern New England to a moderate risk for excessive rainfall through Monday morning, with 3 to 6 inches of rain expected in cities such as Worcester and Hartford, Conn., the service said.

The deluge may lead to flash flooding and rapid rises on small rivers and streams, the weather service said.

Wind gusts of up to 60 miles per hour are possible across southeastern Massachusetts and Cape Cod during the storm, along with minor accumulations of 1 to 4 inches of snow in higher elevations in western parts of the state, the National Weather Service said on social media. There is also the possibility of coastal flooding in Narragansett Bay.

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The weather service warned about the possibility of downed trees and power lines along the South Shore, Cape Cod, Martha’s Vineyard, and Nantucket from Sunday night into Monday morning. Significant street flooding and minor river and stream flooding west of I-95 could occur, as well.

“With the expectation of heavy rain, there could be some flooding of some of the smaller rivers and streams, especially when you get out towards the Merrimack Valley, north and west of the city, and then out towards Worcester,” Dellicarpini said.

Eversource prepared crews and materials to respond to any power outages caused by the incoming storm, the company said in a statement Sunday morning.

“You can get ready, too, by assembling a kit with essentials,” Eversource said on Facebook.

Conditions on the water could be dangerous for boaters, with high winds Sunday night into Monday, the weather service said. Monday morning will bring a high tide to the South Shore, which could cause minor flooding of coastal roads, the forecast said.

MBTA ferry service will be canceled Monday morning, although all other MBTA modes of service are expected to operate regularly, the agency said in a statement.

The Hingham to Boston ferry is expected to resume at 11 a.m., the Charlestown to Boston ferry will resume at noon, and the Hingham, Hull, and Logan to Boston ferry at 2 p.m.

For Greater Boston, the worst of the storm is predicted to last from around 10 p.m. Sunday to 8 a.m. Monday, Dellicarpini said.

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Rain and possible thunderstorms are in the forecast for Monday before 1 p.m., with only a slight chance of rain between 1 p.m. and 2 p.m., the weather service said. Some of the storms could produce heavy rainfall, and patchy fog might roll through before 8 a.m., according to the forecast.

There will be a south wind around 24 miles per hour, with wind gusts as high as 40 miles per hour in the morning, the forecast said. The winds will become west in the afternoon.

“We’re telling folks to expect a slower than normal commute tomorrow morning — plan in some extra time. There’s likely to be some street flooding and low visibility, which is going to slow the commute,” Dellicarpini said.

Globe correspondent Adam Sennott contributed to this report.


Bailey Allen can be reached at bailey.allen@globe.com. Follow her on Twitter @baileyaallen.