In many ways, a supercell thunderstorm is something you probably do not want to see in person. They are potentially harmful storms that could turn into tornadoes pretty easily but are technically not a tornado themselves, in spite of what you see above. They come from the presence of a mesocyclone, which is a deep, persistently rotating updraft. That could be why these are also known as rotating thunderstorms. There are three forms of supercell thunderstorms: classic, low-precipitation, and high-precipitation. LPs are usually found in more arid environments, particularly in the United States. Where HPs are found in more moist climates.