Derechos are a widespread and damaging group of severe thunderstorms which often represent with rapid forward speeds. They have a distinct appearance on radars, known as bow echos, and carry extremely strong winds. Unlike other thunderstorms, derecho storms usually hit suddenly, with intense hurricane force winds that are accompanied by spraying rain and frequent lightning from all directions. A derecho can create heavy damage in only a short time period. These storms usually happen in North America, although they can occur elsewhere around the world. Winds with these storms can exceed 100 mph in certain cases.