Vortex, Polar

The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously ...
Imagine the polar vortex as a giant, icy whirlpool far above the Earth, keeping frigid Arctic air contained near the north ...
This blast of cold weather is due to activity of the polar vortex.
It's going to get cold in Tennessee. Meteorologists predict freezing temperatures for much of the state. Here's the latest.
These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...
The polar vortex is like a giant, swirling pool of super-cold air in the upper atmosphere over the North Pole. Imagine it like a children's spinning top. When the top is spinning fast and steady ...
Americans were bracing Thursday for frigid temperatures that forecasters said could produce life-threatening conditions, with ...
The polar vortex is always around. It is a channel of strong winds high up in the atmosphere that circles the poles. One over ...
A lobe of the Polar Vortex is going to swing through Ontario just north of Michigan. The upper-air forecast gives us an easy look at this strong winter player. The general meaning of the Polar ...
An arctic blast will send temperatures across the United States plummeting as bitterly cold air that originated in Siberia ...