A brief perusal of any introductory meteorology textbook shows that tornado frequency is highest in a band from the central Great Plains  across north Texas and east to Georgia, with a significant local  minimum in north Louisiana. An analysis of National Weather Service  storm reports from the period 1950 to 1997 considered tornado  occurrence across a 26 parish area of north Louisiana, examining  frequency and strength of tornadoes by parishes and in North  Louisiana as a whole. It is believed that most tornadoes that strike  Louisiana are weak, generally ranging from F0 to F2 on the Fujita  scale. Stronger tornadoes are possible in some sections of the  region. Several plausible explanations of this distribution are given