They have winds 261 to 318 mph. F5 tornadoes are very rare. Three hundred eighteen mph are the fastest known winds ever found in a tornado. Other sources for measuring tornadoes are weather balloons, radar, and satellites. Weather balloons help scientists track clouds and help predict where supercells are most likely to form.
Radar helps scientists track rain, clouds, and storms.
It gives important information where and when tornadoes will strike. Satellites provide photographs from above clouds and transfer important information from one place to another. The deadliest tornadoes in the southern United States caused numerous deaths and incredible devastation. Most of these tornadoes occurred in April. Also in April of the same year, there was a tornado in Gainesville, Georgia, which killed 203 people.