A lake-effect squall can arrive over Holland in the middle of a Tuesday afternoon — sun on Chicago Drive one minute, then a wall of white and traffic down to a crawl. DJ's Landscape Management plans for the middle of the day as carefully as the middle of the night: plowing lots and drives, keeping entrances and walkways open, salting the spots that refreeze at dusk. Most of managing snow is managing the hours between storms, while there is still room left to push it. The properties that stay open through a bad week are the ones somebody was already watching. Snow services in Holland, Zeeland and the neighboring townships.