The first real snow up in the Lake Hill and Shady lanes arrives without much announcement, usually in December, usually overnight. Roots Up Plant Health Inc. answers it with the plow — driveways and parking areas opened, walkways and doorsteps shoveled, salt laid down on the slick pitches. Narrow roads and long shaded drives are the ordinary shape of winter work out here, and the passes are timed to match. The morning after a storm, one plowed lane running clean through all that white is about as good as the season gets.