Most moved from Texas, California and Florida, per Stacker's analysis of U.S. Since 1990, more than 1 million newcomers moved to Denver metro area and the population of Colorado nearly doubled, from 3.2 million to 5.8 million as of 2020. “This is like a once in every 30 years event, we haven't seen temperatures this cold since 1990, so this is unusual, but it's not unheard of.” ![]() “This is a fairly rare event,” said Jeff Weber, an atmospheric scientist at the National Center for Atmospheric Research. The cold snap came courtesy of northwestern Canada, where a clockwise-rotating anticyclone built up high pressure, pushing frigid arctic air south across the U.S., gifting winter weather down Colorado’s Front Range, across Texas and out to the Gulf of Mexico. 14, 2008.ĭenver International Airport canceled more than 460 flights, according to FlightAware, with only Chicago O'Hare reporting more cancellations in the U.S. The 75-degree drop nearly touched the previous 18-hour temperature swing record of 76 degrees recorded on Dec. ![]() The National Weather Service has more than 900 ASOS sites across the country with data going back to the 1970s. The data was collected by the Automated Surface Observing Systems program, or ASOS, at the Denver International Airport. DENVER (CN) - A arctic cold front swept through Denver on Wednesday afternoon, driving temperatures down an astounding 75 degrees over an 18-hour period and setting a new record for greatest temperature decrease in a single hour - from 42 degrees to 5 degrees.
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