Posted December 31, 2017 6:33 p.m. EST
Frigid air will continue to expand over the Great Lakes on Monday, bringing even more snow to areas downwind of the lakes. Parts of northern Indiana and Ohio as well as much of New York, Michigan and northern Pennsylvania can expect snow, some of which may be heavy enough to result in whiteout conditions and poor visibility.
The rest of the northern half of the United States will be dry to start the new year. High pressure will continue to pull arctic air through much of the Plains along with the Northeast, the Middle Atlantic and much of the Southeast. Especially in northern areas, extreme cold conditions may make any outside activity dangerous.
As the colder air extends farther south, some parts of central and West Texas may experience freezing drizzle early in the day, before temperatures rebound above freezing. Rain showers will affect South Texas and across the Gulf of Mexico to the Florida Peninsula.
The West will remain dry. A high-pressure system over Nevada will keep the cold air away from this part of the country, allowing seasonable or above-normal warmth to prevail.
Focus: Cold Wave in the South This Week
A cold wave will push temperatures 15 to 25 degrees below normal Monday and Tuesday from Texas to the Carolinas as a major cold wave affects the South. The cold will ease somewhat beginning Wednesday, but it will reach South Florida by Thursday.