A trio of researches with the U.S.’s National Oceanic and Atmospheric Administration (NOAA) has found that though there are fewer total days per year when tornados occur in the U.S., the number that occur on days when there are tornados has increased over the past couple of decades. In their paper published in the journal Science, Harold Brooks, Gregory Carbin and Patrick Marsh describe how they studied weather data over the past half century and what they found when looking for trends.
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Data shows fewer tornado days in U.S. but more per event over past couple decades
