Right now, the northern United States is experiencing some of the lowest temperatures of the season so far. Why?
From AccuWeather meteorologist Alex Sosnowski's Nasty Cold Wave Heading for Part of the U.S.: A phenomenon known as sudden stratospheric warming occurred in the arctic region during the first week of January. The stratosphere is located between 6 miles and 30 miles above the ground. Often when this occurs, it forces cold air to build in the lowest layer of the atmosphere then to drive southward.
"The polar vortex," or the core of the cold air that was sitting over the North Pole, "split into two last week," AccuWeather meteorologist Henry Margusity said. "It sent one cold air mass into eastern Canada and the northern tier of the United States and another cold air mass to Russia. If you look at temperatures right now, it's colder in eastern Canada than it is as the poles."
Following deadly and damaging flooding in West Virginia, the risk of heavy rain and isolated flash flooding and mudslides will increase around Independence Day.
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Warmer air and dry weather will allow southern Germany to enjoy the best conditions across the nation to start the new week.
Alamosa, CO (1989)
Record low of 35 followed by record high of 88 on the same date.
Goddard, KS (1994)
Wind gust to 101 mph.
Death Valley, CA (2001)