Police Lt. Mike Thompson the dogs joined the search Friday and come from two Wyoming search and rescue units; Jackson and Cody.
Authorities say a caller reported someone yelling for help behind homes along the river at five oclock the morning of January 19th.
When police and firefighters arrived, the woman was in the water clinging to ice. She lost her grip and disappeared under the ice before rescuers could reach her.
Police think the victim may be 36-year old Bobbie Stringham of Casper. She has been missing since that morning.
PHOTO: Alex Rogers/Casper Star-Tribune