Simplify the following text for a Grade 8 native English-speaking person.
Original: Although this is a widely accepted theory for how most tornadoes form , live , and die , it does not explain the formation of smaller tornadoes , such as landspouts , long-lived tornadoes , or tornadoes with multiple vortices .
Simplified: Tornadoes produced from the same storm are referred to as a tornado family . Sometimes multiple tornadoes from distinct mesocyclones occur at the same time .