I am trying to start on a detailed case study of the Feb 21, 1971 outbreak that seemingly devastated much of the Mississippi Delta that day. I have yet to find a good source for the specifics of each of these devastating and long-tracked violent tornadoes. I have located some of the info in the Significant Tornadoes (Grazulis) , Storm Data, and J.Finch's excellent historical weather site. I have hit a snag though as far as the specific tracks etc. though as there is a discrepancy betwen Storm Data and Significant Tornadoes. Since this has been 35 yrs. ago, the information is pretty scarce. Please let me know if there are any good sources about this wild outbreak.