Yes, you're correct. The article ws from the 27th. Her phone last pinged on the 24th, so hard to say when she actually went missing.
Here is family info from the Missing Page. It's important as it gives more specify info and is from family.
"Park rangers are searching for a 56-year-old woman from Mississippi who may have gone missing in Sequoia and Kings Canyon National Park.
Family members say Mary Joanna Gomez is a traveling nurse who was working in San Francisco. They believe she left Wednesday to visit the national park. Gomez's daughter said she received pictures from her mother of the park on Thursday. Gomez was supposed to return to work in San Francisco Friday night but never showed up.
The roads in those parks can be narrow with steep drop offs and night can bring ice with temperatures low as 23*F(-5*C). The Park Service, Sherriff’s depts, and hospitals in those areas have been called and/or notified.
Her phone last pinged 10/24 at 1:46 near Bear Mountain Rd.
Her car was found unoccupied in the Little Baldy area in the park early Sunday morning."
Missing Persons Cases Network