Emergency communication system
161 people were killed and at least 990 injured when an EF5 multiple-vortex tornado hit Joplin, Missouri. Because Joplin is located in a tornado-heavy area of the country, many people considered the tornado sirens routine and ignored them. Instead, many residents waited until they received confirmation from another, non-routine, source, such as seeing the tornado, a radio or TV report, or hearing a second siren. In the aftermath, an assessment team recommended that emergency warnings take risk perception into account to convey a sense of urgency. NOAA Officials are considering ways to change the warning system to distinguish smaller tornadoes from more deadly ones.
Tornadoes of 1977
Violent F5 tornado struck the Smithfield area in northern Birmingham, Alabama, sweeping away many homes and killing 22 people. Outbreak extended from Mississippi to North Carolina, with several strong tornadoes documented. The storm system also caused the crash of Southern Airways Flight 242, which happened on the same day, in the same area. Not only an F5 tornado occurred, but an F3 tornado struck the Lindale, Georgia area, where 12 trailers were completely swept away off their foundations killing 1 person. Many people don't know that Ted Fujita flew over the damage and toyed with rating the tornado an F6.