Kyndra Nevils, 33, left her children with a roommate at her Yelm home to go to the mall at 7 p.m. that Saturday.
Nevils was planning on taking a bus, but never got to the mall. Police believe she never got on the bus. She was not driving a vehicle and has no known medical conditions, the release said.
Nevils is 5-feet 3-inches tall, medium build, has green eyes, black hair and a tattoo on her upper chest.
If anyone has seen or knows Nevils whereabouts, they are asked to call the Sheriff's Office at 360-704-2740.