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The winter of 2010 began with La Niña conditions taking hold. A "normal" La Niña would have pushed the jet stream northward, pushing cold arctic air (one of the ingredients of severe weather) away from the lower US. But this La Niña petered out quickly, and no El Niño rose up to replace it. The jet stream was free to misbehave. "By mid-January 2011, La Niña weakened rapidly and by mid-February it was 'adios La Niña,' allowing the jet stream to meander wildly around the US. Consequently the weather pattern became dominated by strong outbreaks of frigid polar air, producing blizzards across the West, Upper Midwest, and northeast US."1
Originally posted by lcbjr1979
11:30 pm here in MN. 77 degrees and 94% humidity. It feels really nasty and thick out. Just 6 months ago it was
-30. Tomorow its going to be 95 degrees. Its crazy that the temperature can fluctuate 125 degrees in 6 months.