Scientists say the number of tornadoes per outbreak is increasing, but explaining this uptick has been challenging. - NBCNewsMACH
marked the 12th consecutive day of such severe storms in the United States, with an average of 27.5 tornadoes occurring each day over that time period. If that seems like a lot, that’s because it is.
“The overall trend is not upwards, but what was surprising and sharply up is the fact that when conditions become favorable for tornadoes,,” Elsner, who was the lead author of a 2014 study about this phenomenon, said. , according to the National Oceanic and Atmospheric Administration. This is up from an average of 743 tornadoes at this point in the year from 2005 to 2015, Gensini said. Monday’s rash of tornadoes, which caused widespread damage in the Dayton, Ohio, area and knocked out power to around 68,000 households, already ranks as the fourth most active tornado day of 2019, according to NOAA statistics.
Climate change is causing ocean temperatures and global surface temperatures to increase, which in turn drives atmospheric instability when warm, moist air moves across the middle of the country, according to Kevin Trenberth, a senior scientist at the National Center for Atmospheric Research in Boulder, Colorado.
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