 There, Forbes studied under famous tornado scientist Ted Fujita and his thesis was regarding the 1974 Super Outbreak where he and Fujita did aerial and ground investigations documenting tornado paths and furthering ideas of the tornado family and of multiple-vortex tornadoes.It was with those data he confirmed in a 1981 article that the hook echo is an excellent clue on a weather radar for the development of tornadoes.Forbes served as field manager for the Project NIMROD, the first measurement program to study damaging thunderstorm winds from downbursts and microbursts.