QuickBird Image Tuscaloosa Tornado
Alabama's tornado hot spots: using data to build a heat map (that you can build, too)
Alabama Tornado Database Records
Alabama Tornado Statistics
Explaining the trends and variability in the United States tornado records using climate teleconnections and shifts in observational practices
Alabama Tornadoes: Deadly tornadoes follow similar path in Jefferson County
NWS Nashville determines Nashville, Cookeville tornadoes were two of seven tornadoes Tuesday morning
Three Things to Know About the Tornadoes That Devastated Rural Alabama – Mother Jones
Tornado 'hot spots' and what we've learned since April 27th
Super Outbreak of 2011, Record-Breaking, Severe Weather, Tornadoes