Even when you know a change is coming, it is still hard to believe what a difference a day makes in the Grand Valley.

One day it is 67 degrees and beautiful and  you're enjoying some time on the golf course -- and less than 24 hours it's 30 degrees colder and it's snowing  and your golf game seems like a distant memory.

A view of the Bookcliffs north of Grand Junction illustrates just how different two days in the Grand Valley can be. Welcome to the arrival of winter.