What is the Polar Vortex you ask?

According to Webster’s Dictionary, a  polar vortex is a persistent, large-scale cyclone located near one or both of a planet’s geographical poles. On Earth, the polar vortices are located in the middle and upper troposphere and the stratosphere.

The much-dreaded Polar Vortex is set to return to the Midwest and the Northeast this week, bringing even more freezing temperatures to the already hateful population.

According to an alert from the National Weather service, the cold blast is set to arrive in the northern plains on Monday and spread to the east coast by Wednesday, bringing temperatures 10 to 30 degrees below normal for this time of year, USA Today reports.

The Midwest can expect high temperatures in the single digits this week, while the eastern corridor will see highs in the 20s and 30s and lows in the low teens. Alabama and Mississippi may see freezing temperatures by Thursday, Weather.com reports.

Make sure you grab those coats when you’re leaving your house!