UPI21 天
Chain reaction could unleash cold polar vortex across United States through April
The polar vortex is a part of Earth's atmosphere that is found over the North Pole. Strong winds typically keep the vortex locked in place, but periodically, changes in the weather can cause the ...
AOL21 天
Chain reaction could unleash polar vortex in US
What is the polar vortex? The polar vortex is a part of Earth's atmosphere that is found over the North Pole. Strong winds typically keep the vortex locked in place, but periodically, changes in ...