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Snow coming Monday, but amount uncertain

After a cold and dry weekend, a significant snowstorm should arrive Monday — although forecasters say it’s still unclear exactly where or how powerfully this storm will strike.

“It’s more likely that we will be having a plowable event,” said National Weather Service meteorologist Alan Dunham. “A lot of things can change, but right now indications are that heavier snow will be over the South Shore and Rhode Island.”

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Snowfall is expected as early as 2 p.m. Sunday, although temperatures in the mid-30s could lead to mixing rain showers. Heavier snow should arrive after midnight and continue all day Monday, impacting both morning and afternoon commutes, Dunham said.

Forecasters are still uncertain about which direction the storm will travel, making accumulation estimates difficult to predict.

“It’s too early to tell,” Dunham said. “There’s still some variability, and a 20-mile difference in the track of the storm north or south will have an impact on where the heavier snow is.”

Skies today will be sunny and clear. Highs will only climb to 23 degrees, 4 degrees below normal. Wind chill values could be as cold as minus 4. Some light clouds will arrive in the evening as temperatures plunge into the single digits.

Saturday will see a slight warmup, with temperatures rising to 33 degrees. Mostly cloudy skies and lows in the upper 20s will move in overnight.

Some very light flurries could start falling Sunday morning ahead of the storm. High temperatures nearing 36 degrees could lead to some scattered rain showers mixed in, especially south of the city, Dunham said.

Temperatures will sink to the upper teens overnight as the storm makes its way into the region.

“We should have snowall Sunday night and Monday,” Dunham said.

The region will see “significant” snowfall Monday, with accumulations large enough to require plows, forecasters said. It is still too early for inch-count predictions to be accurate, however.

“Any slight shift in the track of the storm really depends on how far south this arctic front comes in early Sunday morning,” Dunham said. “For right now, the closer you are to the south coast, the more snow you will see.”

After the storm exits the region, dry conditions and temperatures below freezing should persist through the end of next week, forecasters said.

Catalina Gaitan can be reached at catalina.gaitan@globe.com. Follow her on Twitter at @catalina_gaitan.
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