A relatively weak tornado produced a record-breaking and more-than-mile-wide swath of damage in Iowa. Here's how that stacks ...

Damage surveys provide crucial information about when, where and how strong U.S. tornadoes are to better understand disaster risk ...

Large tornadoes cause the most damage. "Some small 'rope' tornadoes still can cause violent damage of EF4 or EF5; and some very large tornadoes over a quarter-mile wide have produced only weak ...

Isaiah Davis has dealt with injuries, a postponed season and trying to make the leap to the NFL from a small college ... On May 22, 2011, an EF5 tornado -- which has the strength to tear buildings ...

The shelters on this list vary in size, ranging from small underground units that can ... so they can practically assure safety if an EF4 or EF5 tornado moves through that particular area ...

Severe thunderstorms and relentless rain are triggering catastrophic flooding across the middle of the US this weekend, as ...

To much chagrin, it rates tornadoes solely based on the damage ... cars thrown and small missiles generated. EF5 Typical Observations: Incredible damage. Strong frame houses leveled off ...

They’re rated from EF0 to EF5 on the Enhanced Fujita or ... A radar confirmed tornado ripped through a small town about an hour and a half east of Kansas City on Wednesday morning, causing ...