Add the possibility of a half a foot of lake-effect snow to the bitter cold about to descend on northwestern Pennsylvania.

Portions of Pennsylvania and New York are under a lake-effect snow warning on Tuesday as heavy accumulations are possible.

Parts of the Midwest and Northeastern United States are expected to see snow this week — some more than others.

New York Gov. Kathy Hochul announced on Sunday that crews across the state were getting into position to deal with the snow.

The National Weather Service in Cleveland forecast calls for 6 inches to 14 inches of snow in various parts of Erie County through early Thursday.

On Sunday at 3:23 a.m. a winter weather advisory was issued by the National Weather Service valid from 4 p.m. until Monday 4 p.m. for Northern Erie and Southern Erie.

There will be minor additional minor accumulations of lake effect snow into tonight.

National Weather Service Cleveland predicts snow and slick conditions in Northeast Ohio, with lake-effect accumulations and an arctic front approaching.

More than 650,000 people in New York and parts of Pennsylvania remain under Lake-Effect Snow Warnings after 14-24 inches of snow already blanketed parts of the region.

The coldest air of the season is heading our way for early next week, already an Extreme Cold Watch for northern PA.

A lake effect snow warning was issued by the National Weather Service on Monday at 2:53 a.m. valid from Tuesday 1 a.m. until Thursday 1 a.m. for Northern Erie and Southern Erie.

Winter weather advisories or winter storm warnings are in place for nine states across the U.S. as of early Tuesday morning, and up to nine inches of snow is forecast by the National Weather Service (NWS) in some parts of the country.