WASHINGTON — 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.Via AccuWeather:
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.
The polar vortex is a large pocket of very cold air, typically the coldest air in the Northern Hemisphere, which sits over the polar region. Occasionally, this pocket of very cold air can get dislodged farther south than normal, leading to cold outbreaks in Canada and the U.S.
The coldest weather of the season so far will extend from the Dakotas to Texas and the Interstate-95 corridor by the end of the week. The outbreak of arctic air will be long-lasting and may linger well past the middle of the month.