Feds: Don’t expect winter to be polar vortex redux


WASHINGTON (AP) — If you thought last winter was a horror show, with cold blasts from the polar vortex
and a lack of California rain, here’s some good news: No sequel is expected this year, federal
forecasters say.

Mike Halpert of the National Oceanic and Atmospheric Administration said Thursday that the upcoming
winter looks pretty average in general. He doesn’t expect a lot of extreme conditions like last year’s
cold outbreaks when Arctic air dipped south with the polar vortex.

"A repeat of last winter is not particularly likely," said Halpert, acting director of NOAA’s
Climate Prediction Center in College Park, Maryland.

That doesn’t mean there won’t be cold air and snow, which is normal for much of the country during
winter, Halpert said. It just won’t persist as much as it did last year, when extreme weather seemed to
be stuck in place, he said.

Similarly, the high pressure ridge off the Pacific coast that last year kept rain out of California
during its crucial winter rainy season is unlikely to return in force, Halpert said.

NOAA didn’t predict last winter’s extremes in last year’s winter forecast.

For December through February, NOAA forecasts warmer-than-normal winter temperatures for most of the
West, northern tier and northern New England, with cooler weather in the Southeast, and average
temperatures elsewhere.

The agency predicts wetter-than-normal conditions stretching from Southern California to Florida and up
to northern New Hampshire, with dry patches in the Pacific Northwest and Great Lakes. Average
precipitation is forecast elsewhere.

A long-expected El Nino — a warming of the tropical Pacific that changes weather worldwide — makes last
year’s extremes less likely and the wetter, cooler south more likely, Halpert said.

Other private weather forecasters are predicting a slightly cooler winter than NOAA.

Judah Cohen, director of seasonal forecast at Atmospheric and Environmental Research in Lexington,
Massachusetts, has pioneered winter forecasts that link colder Eastern U.S. weather to years when there
is more snow on the ground in Siberia in October. It’s still early and October isn’t finished, but the
month has started out unusually snowy in Siberia, which preliminarily points to a cooler winter for east
of the Mississippi River, he said.

Halpert said Cohen’s method is intriguing but NOAA needs more years to show that it works as forecast

Ryan Maue of the private WeatherBell Analytics of New York predicts that "a vast majority of the
nation will experience significant periods of below-normal temperatures this winter, with the coldest
temperatures (relative to normal) occurring in the Ohio Valley and up through the Eastern Plains."



NOAA winter outlook: http://www.noaanews.noaa.gov/stories2014/20141016_winteroutlook.html


Seth Borenstein can be followed at http://twitter.com/borenbears

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