Will a plane still fly in 30% of snow weather?
That means that there is a 30% chance of light snow. Or, in other words, a 70% chance that there will be no snow. Snow showers may cause delays for deicing, but they don’t cause cancellations. However, there is no guarantee that your flight can’t be canceled even if it is sunny. Unless it is the first flight of the day, the aircraft has to fly in from another city. If your plane starts out in Denver and there is a snowstorm there, the aircraft may not be able to leave Denver. In that case, your flight out of Salt Lake City could be canceled. They can’t put you on a plane that is stranded somewhere else.