Savannah Guthrie shared an emotional Mother's Day post for her mother, who is missing. : Nathan Congleton/NBC via Getty Images Savannah Guthrie made an emotional post about her mother, who went missing in February. Nancy Guthrie disappeared from her Arizona home, and authorities believe she was abducted. Savannah reiterated her call to help, asking anyone with information to come forward. Savannah Guthrie posted an emotional montage of her mother, Nancy Guthrie , who is missing, on Mother's Day. "Mother, daughter, sister, Nonie - we miss you with every breath. We will never stop looking for you," she wrote in the Sunday Instagram post. "We will never be at peace until we find you." The journalist and "Today" show host then repeated her callout for information. "Someone knows something that can make the difference," Guthrie wrote. She said the reward for returning her mother is still available.…