The following statistics and definitions are derived from the Storm Prediction Center (SPC) historical tornado archive.  The Tornado History Project can 
not guarantee the accuracy of the underlying data within the SPC historical tornado archive.  However, <i>the data as presented here is guaranteed to 
match the SPC data, except where noted.</i><br /><br />
Some definitions will not be given since they are obvious (i.e. "Date", "Time", etc...)<br />
Special Note:  The tornado "Index" is not contained in the historical tornado archive.  Rather, it is a classification created by the Tornado History 
Project to uniquely identify each tornado.<br /><br />
<b>State</b> - The state or states affected by a tornado.<br />
<b>Fujita</b> - The Fujita scale is an attempt to classify damage from a tornado.  F0 being the least damaging, F5 the most. For 2007 and beyond, 
the Enhanced Fujita (EF) is given.<br />
<b>Fat.</b> - The number of fatalities attributed to the tornado.<br />
<b>Inj.</b> - The number of injuries attributed to the tornado.<br />
<b>Width</b> - Width in yards.  It is unclear if this indicates a maximum width or mean width.<br />
<b>Length</b> - Length of tornado path in miles.  Note the entire track length is not necessarily all on the ground (some tornadoes "hop and skip".)<br />
<b>Damage</b> - Prior to 1996, this is a range by dollar amount.  For 1996 and later, actual damage estimates are in millions.<br />
<b>Crop Loss</b> - Added in 2007.  Given in millions of dollars.<br />
<b>Lat/Lon</b> - Contains two sets of coordinates:
<ul>
<li><b>Touchdown Latitude/Longitude</b> - For single state tornadoes, and the overall record for multi-state tornadoes, the approximate touchdown location in 
decimal degrees.  For the state specific records of multi-state tornadoes, entry point into the state in decimal degrees.<br /></li>
<li><b>Liftoff Latitude/Longitude</b>  - For single state tornadoes, and the overall record for multi-state tornadoes, the approximate liftoff location in 
decimal degrees.  For the state specific records of multi-state tornadoes, the exit or lift-off point from the state in decimal degrees.<br /></li>
</ul>
<b>St. #.</b> - The state tornado number assigned to the tornado for that specific state for that specific year.  Generally, state tornado 
numbers were assigned in the order the tornado occurred, but that is not always the case.<br />
<b>SPC #</b> - The tornado number as assigned by the SPC.  Tornado numbers are not unique and reset each year.  Generally, tornado numbers were 
assigned in the order the tornado occurred, but that is not always the case.