The people who study tornadoes and all other weather patterns and phenomena are called research meteorologists. Amateurs who follow and record tornado-producing storms as a hobby or for personal study are called storm chasers.
A meteorologist is a person who has a degree or an advanced degree in meteorology, though many have degrees in physics, chemistry, mathematics or other scientific disciplines. Meteorologists who study tornadoes are particularly interested in understanding the conditions that create tornadoes as well as predicting storm dynamics and paths. Innovations such as Doppler radar have made understanding and forecasting tornadoes easier, leading to more effective warnings and saved lives.