I keep dreaming the snowline moved up the mountain

In the dream I'm standing at the base of a face I've climbed a hundred times, and the snowline is way higher than it should be — like the mountain grew overnight. I can see old ski tracks leading up into rocks that were never skiable. I check my beacon and it reads a signal that isn't mine. I don't wake up scared, just confused, the way you feel when you get a forecast wrong and the snow tells you quietly you were never reading it right.