 Turbulence and icing are also significant in-flight hazards.Thunderstorms are a problem for all aircraft because of severe turbulence due to their updrafts and outflow boundaries, icing due to the heavy precipitation, as well as large hail, strong winds, and lightning, all of which can cause severe damage to an aircraft in flight.Volcanic ash is also a significant problem for aviation, as aircraft can lose engine power within ash clouds.