The storm always seems to arrive at dinnertime, right when the lots along Ken Pratt Boulevard are as full as they will be all day. National Property Maintenance takes those hours, plowing the wide open pavement, cutting sidewalks and entrances free, laying ice melt at every door and curb ramp. There is a geometry to a lot done well: rows kept usable, piles out of the sightlines, drive aisles honest by morning. Overnight passes hold that shape while the snow keeps its own schedule. The first car in at seven should never have to think about any of it.