White Christmas 2010 vs. 2011: The Difference a Year Makes
By By Meghan Evans, Meteorologist
December 22, 2011, 5:24:46 AM EST
What a difference a year makes as far as who will see a white Christmas this year compared to last year!
In 2010, approximately 50 percent of the country had a white Christmas, much more than is expected this year. Currently, only about 24 percent of the country has snow on the ground.
To the pleasure of some and dismay of others, some of the big Midwestern cities that had a white Christmas last year are not as likely to have one this year. Chicago, Indianapolis, Detroit and St. Louis are all included.
A lack of lasting cold shots is a theme of this season so far. "Colder air was much more established across much of the country last year," according to Expert Senior Meteorologist Bernie Rayno.
From Dec. 1 to Dec. 25, 2010, many cities had temperature departures well below normal. The following is a list of approximate temperature departures from normal (in degrees F) during that time period: Bismarck, N.D., -6; Minneapolis, -5; Chicago, -7; Cincinnati, -10; Pittsburgh, -8; New York City, -5.
Even areas farther south and east, such as Cincinnati, Louisville and Nashville, had a white Christmas in 2010. However, a white Christmas for these cities is doubtful this year.
"The second factor to the difference in snow cover this year compared to last is the storm track. There were a lot more storm systems that came out of the Plain states," said Rayno.
"There was a lot more troughiness across the eastern U.S. with lake snow well established (last year)."
"This year, there has been one main storm track, from the Southwest and up into the central Plains. So, storm tracks have been much farther north and west compared to last year."
One area of the country that has more snow cover this year compared to last is the southern Rockies. Snow all the way down into northern Arizona and northern New Mexico is the result of frequent storms passing over the Southwest this year.
The deadly blizzard that struck the southern High Plains early this week also dumped snow that will stick around through Christmas.
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