Donna Molnar went missing 3-days-ago after she left her home in a blizzard to grocery shop.
A team combed the area with a search-and-rescue dog where Donna's van was found a day earlier, but were not optimistic that she could survive the negative-20 below winds.
Ace, a Dutch shepherd, is credited with discovering Donna who was almost completely covered in snow. Rescuers gently removed her from a 3-foot-deep mound of snow, which insulated her from the freezing temperatures.
Donna was able to speak and said she was sorry to have caused any trouble. Rescuers rushed her to the hospital where she was sedated before undergoing intensive treatment for hypothermia and severe frostbite. Doctors say her recovery will take months.