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An icy blast is set to bring 'the coldest air in five years' to the US in the coming days causing temperatures to plummet to MINUS 45F in some parts.
As the country gears up for a bitterly cold weekend forecasters have warned there is worse to come as a replay of the 'polar vortex' that bludgeoned the U.S. in 2014 hits.
Time - Round - Wind - Chills - Midweek
They say it could be even colder this time round with wind chills by midweek as much as 45 below in Chicago.
The arctic blast spread painful cold across the Midwest on Friday, closing schools, opening warming centers.
Jeff - Masters - Meteorology - Director - Weather
Jeff Masters, meteorology director at the private Weather Underground, said: 'We're going to be feeling it big time. It's going to be the coldest air in five years.'
America - Edge - Cold - Weather - Advisories
For much of middle America, the leading edge was bad enough. Cold weather advisories were in effect Friday from North Dakota to Ohio, with dangerously cold wind chills that could dip to as low as 45 below zero in northern Wisconsin and Minnesota and to 35 below in parts of northern Illinois and Iowa.
Meteorologists said when the polar vortex plunges into the U.S., it will be warmer in parts of the Arctic - Greenland, northern Canada and Alaska - than in Chicago and Minneapolis.
Masters - Snap - Vortex - Air - Weather
Masters said the cold snap is due to the polar vortex, the gigantic circular upper air weather pattern in the Arctic region enveloping the North Pole, splitting into three pieces in late December because of an occasional weather condition called 'sudden stratospheric warming.'
One chunk of that trapped cold air went to Siberia, another to Scandinavia, and the third piece is heading through Canada. On Wednesday, it will be over northern Michigan somewhere, he said.
System - Forecasters - Computer - Forecast - Models
It's a system some forecasters have dubbed 'Barney' because computer forecast models show the cold...
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