Math Lessons in Winter

1 snowstorm = joy 2 snowstorms = resignation 3 snowstorms = frustration 4 additional inches of snow + 30 mph winds = filled in snow paths in the yard 20+ inches of snow + 11 days of sub-freezing weather = clean Border collies If it snows four inches and the wind blows at 30 mph and the husband works for 50 minutes to clear the quarter-mile lane, how long will it stay passable?