Driven by weather, it comes down to taking off or being grounded. There are many things for a pilot to watch for, but thunderstorms and icing are among the most treacherous. They can be strong enough to crash a plane. The planes don't have much maneuvering room, and they're starting to get close to buildings and trees. It's also at these altitudes where microbursts have strong horizontal winds.
Aircraft do have limits in crosswinds and wind gusts and things that they can operate in.
Jonathan Sweatman, who has had his private pilot's license for two years, added that there are additional elements which can affect flying, especially for small, private planes. This is a double whammy and to be avoided at all costs. A bird's-eye view. With the close connection between weather and flying, it stands to reason that pilots must have a superior understanding of the weather. A student may master most subjects, miss every weather-related question on the final exam, and still obtain a private pilot's license.