The Enhanced Fujita Scale is a classification system for tornadoes. A tornado can be classified in six different strengths, from EF-0 to EF-5, under this system. EF-0 is the weakest tornado while EF-5 is the strongest. The Enhanced Fujita Scale estimates wind speeds of the tornado that went through a particular area based on the damage it has caused. An example of EF-0 damage would be shingles torn off a building. In an EF-5 tornado, the building would be leveled.

Based on the devastation that was left in Joplin, Mo., this past Sunday, it was determined that a strong EF-4 tornado went through the city. The tornado could have produced winds near 200 mph.

Story by AccuWeather.com Meteorologist Andy Mussoline