Unfortunately a case of FAFO, risked her life most likely for the social media hits.
She should have known the temps before she set out - and if she did, would have saved the hike for another day. If she didn't check the temps, she was inexperienced and shouldn't have been hiking at all.
I don’t think she was properly dressed. She should have been wearing layers of cloths and a parka for temperature like that. I learned that in the Army when we went to arctic WX training. Staying warm for 3 days while cross country skiing and snow shoeing while only having pup tents is definitely a challenge. :-(
I’m glad the dog is okay.