The ASOS at Central Nebraska Regional Airport in Grand Island recorded an actual high temperature (NOT heat index) of 100 DEGREES at 347 PM, Wednesday afternoon, August 11th, 2010.
This was the first 100 degree day at Grand Island in a little over 2 years, since August 2nd (101 degrees) and August 3rd (103 degrees) of 2008. During the last 3 summers, 100+ degree days have been tough to come by, with only one in 2007, two in 2008, and NONE in 2009.
Based on a 30-year average from 1971-2000, Grand Island typically "should" hit 100+ degrees 4 or 5 days each summer. On the hot end of this spectrum, 1974 featured 17 days of 100+ degrees, and 1980 featured 16. More recently, 10 days of 100+ degrees occurred in 2006.
Of course, this pales in comparison to the Dust Bowl era, which featured a remarkable 47 DAYS of 100+ degrees in 1934, and 45 DAYS in 1936.