Are Tornadoes Starting To Move In Swarms?

Via io9: ‘A new study looking at the last 59 years of tornadoes in the United States reveals something surprising: We have fewer tornadoes today than we used to. But those tornadoes are hitting in a terrifying new way.

Harold Brooks, atmospheric scientist at NOAA, who you may also remember from his io9 Q&A on tornado season, is the lead author of the study, published today in Science. Starting at around 1980, the total number of tornadoes in a year starts to trend downward — at the same time, however, the days when multiple tornadoes struck started to trend upwards.’