What is one of the conditions necessary for thunderstorms to develop

One condition I think a thunder storm would be nessesary is rain and humid weather

Thunderstorms result from a fast movement of warm, moist air. They can occur inside warm, moist air masses and fronts. As the warm, moist air moves upward, its cools, condenses, and forms cumulonimbus clouds that can reach heights of over 20 km.