TUCSON, Ariz. - The National Weather Service issued a fog advisory for parts of Southern Arizona Tuesday.
The advisory, which lasts until 9 a.m., covers Tucson, Nogales, Green Valley, Marana, Vail, Picacho Peak State Park, Mammoth, Oracle, Sierra Vista, Benson, Willcox, Clifton and Safford.
Low visibility could make driving conditions tough. Drivers are advised to slow down, use headlights and leave plenty of distance in front of them.
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