Tornadoes in May, 2000 The Tornado History Project generates
approximate paths through separate historical archives provided
by the Storm Prediction Center (SPC) and the National Climatic
Data Center (NCDC). Paths generated from the NCDC data are
typically more detailed, but neither archive gives exact path
information. There are several reasons that paths may be
inaccurate: - Tornado touchdown and liftoff coordinates were
recorded with only 2 digits of decimal precision (i.e. [33.72,
-86.15] vs [33.71689, -86.15463]). As a consequence, the
observed points on the map may be slightly off from actual. Note
that beginning in 2009, up to 4 digits of decimal precision are
given. - Coordinates have not historically been calculated via
GPS (Global Positioning System). Thus, tornado touchdown and
liftoff coordinates should be considered as estimates only. -
Tornadoes may not have been in contact with the ground for the
entire path as depicted on the map. Storm damage in any location
depicted under the "path" should n