Tweet of the heat wave, from the National Weather Service:
How hot is it? It’s so hot that all-time records are being set in June: “Nashville has reached its hottest temperature on record…109 degrees at 314 pm. The previous all time record was 107 from July 27th and 28th of 1952.”
UPDATE: Meteorologist Dr. Jeff Masters has more all-time heat records:
109° Columbia, SC (old record 107° on two previous occasions)
109° Cairo, IL (old record 106° on 8/9/1930)
108° Paducah, KY (ties same on 7/17/1942
106° Chattanooga, TN (ties same on 7/28/1952)
105° Raleigh, NC (ties same on 8/21/2007 and 8/18/1988)
105° Greenville, SC (old record 104° 8/10/2007 although 106° was recorded by the Signal Service in July 1887)
104° Charlotte, NC (ties same on 8/9 and 10/2007 and 9/6/1954)
102° Bristol, TN (ties same on 7/28/1952-this site now known as `Tri-State Airport’)
109° Athens, GA. This is just 1° shy of the Georgia state record for June of 110° set at Warrenton in 1959.
Here is a great graphic via Capital Climate:
The U.S. surface temperature map from Unisys at 4 pm, June 29,2012, shows 100° temperatures stretching almost continuously ...