NOTE: TABLE WITH LISTING OF THE TOTAL NUMBER OF TORNADOES BY HOUR

Time refers to the beginning of each hour, (CST) i.e. 8 AM = 8:00-8:59 AM CST 

There have been 2,460 tornadoes in Nebraska during the period 1950-2008

The above graph shows the total number of tornadoes during that time period during each hour of the day. 

The peak frequency is at 1700 hours (5 PM Central Standard Time or 6 PM Daylight Savings Time)

84.4% of all Nebraska tornadoes (2077/2460) have occurred between 2 PM and 9:59 PM.
73.2% of all Nebraska tornadoes (1800/2460) have occurred between 3 PM and 8:59 PM.
64.4% of all Nebraska tornadoes (1585/2460) have occurred between 4 PM and 8:59 PM.
42.1% of all Nebraska tornadoes (1036/2460) have occurred between 5 PM and 7:59 PM.

The year 2001 saw the first and only tornado observed during the 8:00-8:59 AM CST hour. 

UNL
University of Nebraska-Lincoln
Applied Climate Sciences, School of Natural Resources