Starting this week into next, a lobe of the polar vortex will descend into the U.S. and bring with it brutally cold temperatures. Here's the forecast for this week:

An arctic air mass settled over New York City and much of the country Sunday evening, bringing a deep freeze and the chance of more snow than the city has seen in three years.

STATEN ISLAND, N.Y. -- The National Weather Service has issued a winter weather advisory for New York City, effective from 1 p.m. on Sunday, Jan. 19, until 4 a.m. on Monday, Jan. 20.

After a looming snowstorm hits the Tri-State Area on Sunday, arctic air is expected to chill New York City and the surrounding areas. According to a post on the National Weather Service’s X account, the National Weather Service is warning that there might be significant impacts on infrastructure and public health.

The National Weather Service expects New Yorkers to see 4 to 5 inches of snow, while parts of New Jersey could get 6 to 7 inches. “This will be the biggest snowfall this season,” said National Weather Service meteorologist Brian Ciemnecki.

The National Weather Service (NWS) predicts a 50 percent chance of snow Sunday afternoon and night while the Weather Channel predicts an 80 percent chance of snow hitting the city on Sunday. Snow accumulation could reach up to four inches, according to AccuWeather.

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New York City emergency officials have issued a “Cold Weather Alert” amid a stretch of below-freezing wind chills that will only get colder into next week. The coldest air of the season so far will crash into the tri-state on starting early next week with “feels like” temperatures Tuesday dropping as low as -7 degrees.

Much of the tri-state is under a winter storm warning for a snowstorm Sunday that could bring the most accumulating snow to the area in nearly three years. Snow began falling heavier after 4 p.m. as temperatures began drop leading to more accumulations.

New York, United States - January 19, 2025 Pedestrians walks through falling snow, in the New York City borough of Queens, NY, January 19, 2025. The National Weather Service issued a winter storm warning with 3 to 5 inches of snow expected to fall in the city.

A brutal polar vortex is set to bury the Big Apple in snow Sunday and then deliver deadly single-digit temperatures that will feel like 15 degrees below zero.