The short clip filmed at the University of Arizona shows a cold front moving east through Tucson early this morning, followed by dust that limited visibility.
The National Weather Service, who shared the video on Twitter, wrote that temperatures throughout southern Arizona today may be as much as 15 to 20 degrees below average. Freeze warnings were also issued this morning for areas in Cochise County, including Sierra Vista, Benson, and Willcox. Video courtesy of the National Weather Service and UA Hydrology and Atmospheric Sciences.
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