When a squall comes over the ridge at Mount Southington the lights on the slope go soft and the valley below starts filling in fast. A Cut Above Tree Service LLC turns out for those nights, plowing driveways and lots, shoveling steps and walkways, sanding and salting the spots certain to glaze by morning. The good part of the job happens in the dark and is only visible at sunrise: black pavement, square banks, a mailbox anyone can reach. Storms here rarely arrive at a convenient hour, which is exactly why somebody has to be awake for them. Southington gets dug out one property at a time.