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More snow, rain coming Sunday night and frigid Thanksgiving ahead

More rain, along with possible snow, is expected in the Boston area in the coming days. Temperatures will decline headed for a cold Thanksgiving. (Jonathan Wiggs/Globe Staff/file)Jonathan Wiggs

Two bands of snow may be on the way for Boston as temperatures begin to dip in the leadup to Thanksgiving.

The first wave of precipitation is expected to come late Sunday — likely around midnight — and could last through Monday afternoon, according to Matthew Belk, a meteorologist at the National Weather Service.

“Light snow will fall, especially north of the Massachusetts Turnpike, and may linger into the morning commute,” forecasters wrote late Sunday afternoon.

If there is snow, it will likely begin to mix and turn to rain by 1 or 2 a.m., Belk said. Little to no accumulation is expected.

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On Monday morning, “light snow will either change over to rain, or simply come to an end,” forecasters wrote, with additional light accumulations possible for the high terrain of northwestern Massachusetts.

After a brief dry period Monday evening, another system is expected to arrive late Monday night and last into Tuesday afternoon, according to Belk.

“You will probably see some flakes,” he said, noting that little to no accumulation is likely in Boston.

The early morning hours Tuesday have the best chance for snow, and a couple inches are likely outside of Interstate 495, he said. In Boston, any snow and wintry mix will likely switch over to rain between 9 and 11 a.m., Belk said.

“Moderate, possibly heavy, snow is forecast for some time late Monday night into early Tuesday evening,” forecasters wrote. “Travel impacts [are] expected, with significantly reduced visibility and the possibility for slippery, untreated surfaces.”

The greatest risk for accumulating snow on roadways will be north and west of the Interstate 95 corridor, the weather service said in the written outlook.

“There is even a low risk for pockets of freezing rain for a time Tuesday morning across the higher terrain of central and western Massachusetts,” forecasters wrote.

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The Tuesday morning commute is also likely to be affected.

The rest of the week is expected to be dry, but temperatures are expected to be a little colder each day with the approach of Thanksgiving, which is expected to be the coldest day of the week, according to the weather service.

After an expected low of 34 Sunday night, Monday will likely hit about 43 degrees.

Tuesday, the low is expected to be slightly colder, near 39, with the high Wednesday also dipping into the upper 30s, according to forecasters

Thursday could see the week’s lowest temperatures, with a high only near 24 and an overnight low into Friday down at about 14 degrees, according to the weather service.

Friday will likely reverse the trend, with a high near 32 degrees and Saturday near 42, the weather service said.


Lucas Phillips can be reached at lucas.phillips@globe.com.