From Greeley you can watch weather assemble over Longs Peak a full hour before it arrives, a gray shoulder building in the west while the plains are still bright. Sky Service Pros watches that sky for a living and moves out ahead of it — plows staged, walks mapped, de-icer loaded before the first flake reaches town. The work is plowing drives and parking lots, clearing walkways and entries, and handling the refreeze that follows a sunny winter afternoon. On the Front Range a storm can be finished in three hours or grind on for two days, and both need a plan. Getting there first is the whole trick, and it is a satisfying one to pull off.