Our local airport closed yesterday due to icy runways. Planes would circle a while then refuel 100s of miles away, then return to try again. We don't often see

Our local airport closed yesterday due to icy runways. Planes would circle a while then refuel 100s of miles away, then return to try again. We don't often see freezing rain here. It creates a hard, bubbly layer of ice that cannot be scraped off with the usual tool.