The tornado was determined to be an F-2. Prior to 1971, there was no way to measure and classify tornadoes. Dr. Theodore Fujita developed a method for categorizing tornadoes. The F-Scale or Fujita Scale looks at how much damage they cause and using this to estimate the wind speed. It classifies tornadoes by their estimated wind speed, which is determined by looking at how strong the wind must have been to cause the resulting damage.
Tornados are classified into 5 catagories:
- F-0 40-72 mph, Light damage, chimney damage, tree branches broken
- F-1 73-112 mph, Moderate damage, mobile homes pushed off foundation or flipped over
- F-2 113-157 mph, Considerable damage, mobile homes demolished, trees uprooted
- F-3 158-205 mph, Severe damage, roofs and walls torn down, trains overturned, cars thrown around
- F-4 207-260 mph, Devastating damage, well-constructed walls leveled
- F-5 261-318 mph, Violent damage, homes lifted off foundation and carried considerable distances, autos thrown as far as 100 meters.