(KFOR) The National Weather Service has just upgraded the May 31 El Reno, Union City tornado to an EF-5 with a width of 2.6 miles wide, making it the widest tornado ever documented.
EF-5 is the highest possible rating for tornadoes on the Enhanced Fujita scale.
The upgrade was based on information from a Dopler On Wheels (DOW) that measured low level winds of 296 miles per hour.
This tornado is double the width of the May 20 tornado in Moore, Oklahoma.
The F-4 Wilber-Hallam, Nebraska, tornado May 22, 2004 was the previous record holder for the widest tornado on record at 2.5 miles wide.