Brutal cold, dangerous wind chills on tap for New Year's Eve and Day for large areas of the US

Almost the entire country will be looking at temperatures well below normal.

— -- A reinforcing shot of cold air is impacting much of the country -- with nearly two-thirds of the eastern U.S. seeing bitterly cold temperatures. Temperatures in some parts of the country are 20 to 30 degrees below average with life-threatening wind chills in the Northern Plains.

Wind chill warnings, wind chill watches and wind chill advisories have been issued for nearly two-thirds of the nation.

Wind chills on Sunday morning are minus 20 and minus 30 across the Northern Plains with locally lower wind chills. In the Northeast, wind chills are in the single digits, and below zero in New England. The bitter cold is now reaching all the way into the southern U.S. with single-digit wind chills from Oklahoma to Tennessee.

Wind chills are life-threatening in the Northern Plains Sunday morning with wind chill values locally less than minus 50. This region of the country will not see temperatures above zero degrees until Tuesday at the earliest.

Some locations within the U.S. are on track to have the coldest New Year’s Eve in nearly 50 years.

In New York, it will feel like the single digits nearly the entire day on New Year’s Eve and at midnight the temperature is forecast to be 11 degrees in Times Square. The wind chill will be near minus 4. Should the temperature be 11 degrees at the time of the ball drop, it will tie for second-coldest all-time -- set in 1962.

Lake effect snow persists

Slick conditions from light snow on Saturday also played a role in accidents in the Philadelphia region. More than 15 cars were involved in a crash in Montgomery County, Pennsylvania, on Saturday with injuries reported.

In the South, there is some light wintry precipitation stretching from Texas to Alabama. Although accumulations will be extremely light, there may be dangerous ice conditions.

Even colder air in Northeast

With temperatures not forecast to rise above freezing this week, the current cold stretch has potential to rank within the top 5 for most consecutive days with temperatures below freezing in New York City. The record is 16 straight in January-February 1961, but 11 straight would earn a spot in the top 5, according to the National Weather Service.

Forecast models are somewhat in agreement that another shot of very cold air will arrive in the Northeast by the end of the week into next weekend. This cold shot has the potential to be even more intense than the one the region is currently seeing.

However, the most likely scenario involves brutally cold air moving in directly behind the system.