Tuesday afternoon at 1:30 the national weather service, SEMA and local emergency management offices across Missouri will conduct the 38th annual state tornado drill.
It??s part of Missouri Severe Weather Awareness week, which is March 12-16.
According to the national weather service, 2011 was the fourth deadliest tornado year in U.S. history.
The may 22 Joplin tornado, which damaged or destroyed more than 8,000 homes and businesses and was responsible for 161 deaths, was the deadliest tornado on record since modern record keeping began in 1950.
Once you hear broadcast drill messages or outdoor warning sirens Tuesday, authorities recommend practicing taking shelter.
The weather service said the safest shelter location is an interior room without windows in the lowest level of a building.
Other safe locations for businesses and schools include hallways, underneath staircases and designated tornado safe rooms.