A clipper crosses Michigan overnight in a hurry — a few hours of hard, dry snow and a wind behind it that keeps rearranging the results. Nitai Services goes out into that at four in the morning, plowing lots and drives in Wixom's business parks so the day can begin on time. Cold like that makes salt slow, so timing matters more than volume, and the second pass often does what the first one could not. Headlights, a berm rising along the curb, the scrape of a blade finding concrete. By sunrise the pavement is dark and the wind has nothing left to pile up.