"The polar vortex is like a giant, spinning whirlpool of cold air high up in the atmosphere above the North Pole, normally held in place by strong winds that act as a barrier, keeping the extreme cold locked away from the US. However, strong storms and high-pressure systems in the lower atmosphere have sent ripples of warmer air upward that knocked this vortex off balance, allowing the icy Arctic air to dip farther south and blanket the US."
"Winter weather warnings have been issued in 30 states as a bone-chilling polar vortex is poised to freeze the US with record cold temperatures starting tonight. The National Weather Service (NWS) issued winter weather advisories and winter storm watches from Maine to Nebraska, with temperatures in certain regions of the Midwest and Great Plains falling to -10 to -30 degrees Fahrenheit."
"Large stretches of the Midwest which have already been hit by a Thanksgiving snow storm, including in Iowa, Illinois, Indiana, and Michigan, could see temperatures drop into the single digits today and Tuesday. Meteorologists have also warned that the Dakotas, Montana, Wyoming, Wisconsin, and Minnesota may experience their coldest days of the year on Monday, falling well below zero degrees in certain areas by tonight."
Winter weather warnings and advisories now cover 30 states as a polar vortex drives record cold into the United States. The National Weather Service issued watches from Maine to Nebraska, with Midwest and Great Plains temperatures expected between -10 and -30 degrees Fahrenheit. Heaviest snow will arrive Monday night, with parts of Ohio, eastern Pennsylvania, upstate New York, and most of New England seeing up to six inches by Tuesday. Large parts of the Midwest may drop into single digits, and several northern Plains and Upper Midwest states could see their coldest days of the year. Ice warnings affect parts of Maryland, Virginia, West Virginia, and North Carolina. The frigid pattern is expected to last all week as a weakened polar vortex allows Arctic air from Canada and Greenland to plunge south.
Read at Mail Online
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