Sleet is this county's specialty — it comes down as rain over the Nashua and turns to glaze by the time it climbs the hills above Leominster. Worcester Snow & Ice works that changeover, plowing, salting and sanding lots and drives that have to be walkable before the first car swings in. A lot at first light, scraped to wet asphalt with the windrows pushed to the far corner, is a genuinely good thing to stand and look at. Storms keep no office hours in this part of Massachusetts, and neither does the work. From the first flakes of November to the last hard freeze of March, Leominster and the towns around it stay clear.