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Well colder air is becoming reestablished in the central and eastern portions of the
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US after a recent warm-up.
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Over the next two weeks, the polar vortex will be active with the possibility of cold air
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dominating the weather pattern through the end of the month and into early February.
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AccuWeather's lead long-range meteorologist Paul Pastelock said that over the next couple
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of weeks, the jet stream will develop a large buckle with a northward bulge along the
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Pacific coast and a southward dip centered on the Great Lakes.
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This setup stretches the polar vortex, sending persistent warmth near the bulge and repeated
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shots of cold air through the dip.
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For example, temperatures in Chicago are expected to swing from near average to 10 to 20 degrees
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below average over the next one to two weeks.
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The average high in Chicago is around 32 degrees.
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In New York City, temperatures will range from near the historical average in the upper
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30s to 5 to 10 degrees below during the same period.
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Because of the large, rounded shape of the jet stream dip, it will be difficult for storms
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in the south to rapidly strengthen along the Atlantic coast and become major snowstorms.
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Instead, most storms will stay weak, move quickly, and exit out to see through much
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Pastelock explained that very cold air is building back again in western and central
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But it will take some time.
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Now as that happens, people in the central and eastern states will feel more typical winter
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cold and colder conditions than during the past couple of weeks.
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These waves of cold will bring clipper systems and rounds of lake effects snow, snow squalls
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and flurries from the Midwest to the Northeast.
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Later this month and into early February, there is the potential for a more significant
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shift in the polar vortex.
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Akiweather's Alex Stufas said there are some indicators that point toward unusual warmth
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poking all the way into northern Alaska.
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That setup could play a role in a major shift of the polar vortex.
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Depending on snow cover across southern Canada, the Midwest and the interior northeast,
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along with ice cover on the Great Lakes, this has the potential to bring some of the
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coldest air of the winter.
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Now, back in December, while the lakes were mostly ice-free, there was extensive snow cover
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across the central and interior northeast.
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On the coldest December days, temperatures in the Midwest were 20-30 degrees below average.
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And in the Northeast, temperatures were 10-20 degrees below average.
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Snow and ice cover tend to act as an insulator and lock out the warming effects of the
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One way a major storm could develop would be if a roadblock in the atmosphere forms near
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Greenland, which can trap storms along the Atlantic coast and raise the risk of heavy snow.
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There are some signs that a large storm could develop late next week, but Akiweather's
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long-range teams, as it is still too early to determine specific details of that potential
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Well, maybe we'll get some interesting-looking ice rings forming on lakes like what happened
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to one particular lake in Budapest, Hungary last week.
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From above, ice rings appear like a bullseye, creating intricate circular patterns on lakes
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Experts say this striking winter phenomenon only forms under the right set of weather
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The breathtaking phenomenon known as ice rings or ice swirls was recently spotted in drone
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video over a frozen lake near Budapest, where temperatures have been in the upper teens
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and low 20s last week and snow has been a regular occurrence.
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A different angle showed similar ice rings on mirror lake in New Hampshire.
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The photo was taken back in 2020 by a delighted nature photographer while ice skating.
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Experts say giant ice rings like these form on lakes or other large bodies of water through
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a combination of cold weather, snow and ice.
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According to Dr. Gordon Geesprecht, an environmental physiologist at the University of Manitoba, the
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process begins when the ice sheet is thin enough to allow snow to break through and become
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saturated with water.
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He said individual bullseye rings could form it under a minute, based on how quickly fluffy
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snow becomes saturated with water.
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The result is a stunning winter scene that appears to have been created with a paint brush.
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You can find more regional forecasts and science-based articles at acuether.com and for your local forecast
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at your fingertips download the Acuether app.
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Enjoy the rest of your day.
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I'll be back tomorrow with more from Acuether.
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