The National Weather Service has confirmed several EF4-strength tornadoes in outbreaks of severe weather this month, the most since 1997.
Here's the latest: The National Weather Service performed tornado damage surveys following the weekend's tornadoes in Arkansas and determined that two twisters received a violent preliminary EF4 ...
Additionally, a series of tornadoes formed over Memorial Day weekend in North Texas, claiming at least seven lives and injuring more than 100 in Valley View. More: Tornado activity is increasing ...