Report information is from NOAA's National Weather Service Local Storm Reports.
*These numbers are not counts of actual tornadoes, they are counts of all NWS local storm reports. These are tornado observations reported by spotters and other sources. Official documentation of severe weather can be obtained from the National Climatic Data Center Storm Events database. A discussion of the difference between tornadoes and tornado reports can be found at the U.S. Tornadoes site.