Atlanta 106 (New Record); Knoxville 105 (New Record); YTD 40,113 High Records Set To 5,835 Low
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For the seven day period from June 24-30, 1,924 daily high temperature records were set or tied in the U.S., along with 634 warm overnight low temperature records. Of these records, 565 set or tied monthly high temperature records, and 67 set or tied monthly warm overnight low temperature records.
Perhaps most impressive, 155 all-time record high temperatures were set or tied during this period, along with nine all-time record warm overnight low temperature records.
For the year-to-date, there have been 40,113 warm temperature records set or tied, compared to just 5,835 cold records. In other words, the warm temperature records have been outnumbering cold records by about 7-to-1. These figures, compiled by the National Climatic Data Center, are preliminary.
In a long-term trend that demonstrates the effects of a warming climate, daily record-high temperatures have recently been outpacing daily record-lows by an average of 2-to-1, and this imbalance is expected to grow as the climate continues to warm. According to a 2009 study, if the climate were not warming, this ratio would be expected to be even. Other studies have shown that climate change increases the odds of extreme heat events and may make them warmer and longer lasting.
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http://www.climatecentral.org/blogs/heat-wave-sets-more-all-time-temperature-records/