Tuesday, December 15, 2015
WeatherWhys for December 15,2015 from accuweather.com
The intensity of a winter cold snap in the East is highly dependant on
the source region of the air. Air masses that take a direct shot from
the Arctic into the Midwest and Northeast are usually the coldest.
Arctic air masses that come down through the West then shift east tend
to get moderated somewhat.
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