According to the National Weather Service Office for Houston/Galveston, southeast Texas has only recorded six EF-3 tornadoes since 1992. EF-3 tornadoes make up only one percent of the overall tornadoes that touch down in southeast Texas. Chart courtesy of the National Weather Service Office, Houston/Galveston. According to the National Weather Service, only two F-4/EF-4 tornadoes have touched down in the area since 1950. EF-4 and EF-5 tornadoes pack winds in excess of 166 miles per hour!