The culprit is a familiar one: the polar vortex.
Published Jan 29, 2019
While North Americans contended with a blast of Arctic air, Europeans found themselves wondering where winter went.
Published Jan 10, 2014
With multiple storms offshore and smoke streaming over the continent, there has been plenty for satellites and scientists to track in recent days.
Published Aug 18, 2021
Blasts of Arctic air spilling into the Midwest and Northeast are poised to make New Year’s Eve frigid for many Americans.
Published Dec 29, 2017
The Arctic Oscillation, La Niña, and North Atlantic Oscillation combine to steer winter's cold, snowy weather away from the United States.
Published Feb 8, 2012
Winter turned fierce in the opening weeks of 2009, and part of the reason for the cold snaps and winter storms came from big changes in the atmosphere about 20 kilometers above the Earth.
Published Feb 7, 2009
People in eastern North America shivered through February 2015, while those in the western part of the continent experienced unusually warm weather.
Published Mar 10, 2015
Large waves in the atmosphere mean that a cold snap in one area is often accompanied by unusual warmth in another.
Published Jan 3, 2018
It was cold across the eastern part of North America, but the opposite was true in other parts of the world.
Published Dec 6, 2018
The bitter cold of winter settled ferociously over the interior of Asia during the first week of 2006.
Published Jan 14, 2006Image of the Day Heat Land Life Snow and Ice Temperature Extremes
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