I thought this article was very interesting. Scientist from Yale have been tracking how the climate zones all over the world have shifted over the past several decades. Climate zones are defined by a combination of temperature and precipitation. There is some really cool information in the article. The Sahara Desert has expanded by 81 miles from 1980-1990. The “tropics” have been slowly shrinking. “Tornado Alley” has shifted east since 1980. If you think about it, the frequency of tornados has been increasing in our area for some time. This could be because our technology has increased in warning/spotting them but the eastern half of the U.S. has been recorded warmer which could have helped with the shift. Plant hardiness zones have shifted north, basically, low average winter temperatures have have all shifted northward over the past 20 years. We still have our really cold days but the overall winter temperatures have been a tad warmer.