A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.

When the Polar Vortex is in a weakened state, a jet stream wobble sending polar air into the mid-latitudes becomes more ...

A cooler day is expected as clouds continue to hang over the region. A polar jet stream from the north has dropped into the ...

According to the NWS, the Arctic polar vortex is a powerful band of west-to-east winds that develops in the stratosphere, about 10 to 30 miles above the North Pole, during the winter season. It is ...

Jet streams are air currents formed by the collision of warm tropical air and cold polar air in the atmosphere, plus the rotation of the planet. When meteorologists in North America mention “the ...

(KNWA/KFTA)— After a strong cold front comes through this Saturday ... One way the airmass can be pushed towards us has to do with the polar jet stream and involves the Polar Vortex.

It’s been warmer in Alaska than in three dozen other states. If someone asked you, “Where can I go in the United States to ...

WASHINGTON, Jan 21 (Reuters) - In Earth's upper atmosphere, a fast-moving band of air called the jet stream blows with winds ... degrees Celsius), with its polar regions less hot than the rest.

Maps show what to expect as the cold front arrives. The polar vortex is a large area ... During the winter months and when the jet stream allows, this cold air can drop farther down into lower ...