As winter enters the Northern Hemisphere, temperatures seem to be getting cold enough. However, due to polar vortex Descending from Siberia is about to bring even harsher, colder temperatures to nearly 300 million Americans.

The polar vortex is a large area of ​​cold air and low pressure that typically swirls over the North and South Poles. In winter, when the jet stream allows, cold air can drop further into lower latitudes, such as the United States. This is expected to happen as soon as this weekend.

Starting Saturday, the polar vortex will begin to descend into the northern United States, bringing temperatures down to the single digits. Wind chills in the area have dropped into the teens. Temperatures are expected to be 20-25 degrees below average for this time of year.

On Sunday, a chill hit, with temperatures dropping into the teens in the Central Plains. Winds in the Northern Plains weakened to more than minus 20 degrees, and in the Central Plains the winds weakened to single digits. dangerous cold Conditions for participating in the NFL playoffs. Temperatures are expected to be 25-30 degrees below average for this time of year.

On Monday, the polar vortex will reach the Deep South and temperatures in Atlanta will drop to a freezing 32 degrees Fahrenheit. Wind chills will be in the 20s. span rocky mountainsplains and Midwestsome areas cannot break through single digits.

At least 19 record low and high temperatures are expected from the Plains to the East. Temperatures are expected to be 25-30 degrees below average for this time of year.

for the president inauguration ceremony At Monday's ceremony in Washington, D.C., skies were mostly clear and temperatures were in the low 20s. Wind chill levels are expected to be in the single digits.

This will be the coldest Inauguration Day in 40 years. When President Ronald Reagan was sworn in for the second time in 1985, temperatures reached just 7 degrees, causing the ceremony to be held indoors and the parade to be cancelled.