of a Tornado Occurrence (two maps).
MAP #1: Any Tornado
Julian Day = day of the year, starting with
January 1 and ending on December 31.
For example, skipping February 29 & Leap Years,
March 31 = Day #90; April 30 = Day #120; May 31 =
Day #151, etc.
MAP #2: A Significant Tornado (F-2 or larger)
National Severe Storms Laboratory NSSL
Maps
Created by Dr. Harold Brooks,
Head,
Mesoscale Applications Group, NSSL