The mother of “Today” show anchor Savannah Guthrie has been reported missing in Arizona under “concerning circumstances,” authorities said Sunday. Nancy Guthrie, 84, was last seen at her home in Catalina Foothills, north of Tucson, at around 9:30 p.m. Saturday, the Pima County Sheriff’s Office said. The elder Guthrie was described as being in “not of good physical health” and a “vulnerable adult.” A relative made a 911 call around noon Saturday to report her missing, Pima County Sheriff Chris Nanos said at a press conference.