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Snow will stick on LI in upcoming deep freeze this week

Foggy conditions along Ronkonkoma Avenue in Ronkonkoma Sunday

Foggy conditions along Ronkonkoma Avenue in Ronkonkoma Sunday morning, Jan. 4, 2014. Credit: James Carbone

Bundle up and brace yourself: An arctic blast is set to freeze Long Island by midweek. A light snow Tuesday -- 1 to 1 ½ inches -- will be a prelude to single digit temperatures and subzero wind chills by Thursday, meteorologists at the National Weather Service in Upton said Sunday.

"It's going to be a very cold week," said meteorologist David Stark. Temperatures in the 30s and gusting winds up to 35 miles an hour today will set the tone for the days ahead as four days of below freezing weather are forecast to begin Tuesday.

"The real brunt on the cold is going to be coming Thursday," Stark said. "It is the coldest of the winter season we've seen so far."

Monday is expected to be sunny but cold, giving way to a quick snowstorm Tuesday and temperatures that will not get out of the upper 20s. There's a slight chance of snow Wednesday but not significant accumulation, Stark said.

"There is a wave of cold air coming out of Canada that's going to be heading into the northeastern U.S. on Wednesday and Thursday," he said. "This is the time of year that we get our coldest air."

Temperatures are expected drop to the low 20s Wednesday night, falling as low as six degrees by Thursday morning. The wind will make it feel even colder: wind chill Thursday is forecast to feel as cold as negative 10 degrees.

"You're definitely going to feel that, you're going to need to bundle up," Stark said.

Though sunny, Thursday is expected to have highs in the teens and the mercury on Friday is expected to climb back into the 20s. Temperatures should return to more seasonable mid-30 degree weather by the weekend, Stark said.

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