Researches found little evidence that tornadoes were getting weaker. Instead, it appears that a subjective tornado grading ...
May 20, 2013, marks the last time the United States was hit by the worst type of tornado. On that date, a monster EF5 tornado tore a 17-mile path through the Oklahoma City suburbs, creating "40 ...
A quirky aspect of the way we measure twisters helps explain why there hasn't been a top-tier-rated tornado in 12 years.
It may be hard to believe that with an average of 1,200 tornadoes each year in the United States, we haven’t seen an EF5-rated twister in more than 11 years. But that doesn’t mean the number ...
Despite the number of tornadoes increasing in the U.S., it’s been over 11 years since the last EF5 was recorded. But does that mean the most violent tornadoes are disappearing? A new study gets to the ...