From the Promenade you can watch weather cross the harbor hours before it lands, and that lead time is the whole business. NYC SNOW SERVICES tracks it and stages for it, plowing lots and driveways, shoveling walkways, steps and entries, treating surfaces before the first flake sticks and again once the sky empties. Downtown Brooklyn does not pause for a storm, so routes run overnight and then repeat. Ice at a doorway is the thing everyone remembers, and it gets handled that way. Morning comes and the walks are simply walks again.