资讯

The polar vortex is a large area of cold air high up in the atmosphere that normally spins over the North Pole (as its name suggests). It usually keeps the coldest air locked up in the Arctic.
A blast of arctic air from Canada has brought the season's coldest weather to most of the United States. The system, known as a polar vortex, is forecast to bring subzero temperatures to the ...
When the Arctic's polar vortex is strong it stays parked at the North Pole (left); when it weakens, however, it can move southward, as it did in January 2014 (right).
The polar vortex refers to a blast of cold air typically confined to the North Pole. Occasionally, this frigid system shifts southward, bringing bone-chilling temperatures to the U.S.
However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is bringing an even harsher arctic blast to million Americans this week. Maps show what to expect as the cold front ...
The polar vortex is a band of strong winds circling the North Pole. AP Weather changes in the stratosphere, a layer in Earth’s atmosphere about 19 miles above the surface, lead weather changes ...
Data: NOAA GFS; Map: Erin Davis/Axios Visuals A powerful Arctic outbreak tied in part to the polar vortex is set to send temperatures by next week tumbling down to as cold as 25 to 35 degrees ...
Dust off the parkas. After a mild December, the polar vortex is set to send an arctic blast into the US later this week. “That polar jet will be pushed further south, and guess what that does ...
The polar vortex has become synonymous with winter's most brutal cold. For days, the weather system has been sitting and spinning right along the U.S.-Canada border, with temperatures as low as 43 ...
Bitter cold has settled over Southeastern Wisconsin and much of the country this week. Wind chills have been below 0 degrees and Milwaukee’s airport since 9 p.m. Saturday.
The weather pattern that’s most at home over — you guessed it — Earth’s polar regions has started pushing south, and is bringing plenty of frigid Arctic temperatures and snow along with it.