El Reno, Oklahoma tornado widest ever recorded in the U.S.

By WEEK Producer

MGN online

June 4, 2013 Updated Jun 4, 2013 at 4:20 PM CDT

EL RENO, Okla. -- The deadly tornado that struck El Reno, Oklahoma last Friday night is now believed to be the widest ever recorded in the United States.

The National Weather Service says the twister measured 2.6 miles in width which doesn't include the winds surrounding the storm.

It was measured by a mobile radar unit as the storm passed south of El Reno.

That beats out the previous record which was a 2.5 mile wide twister that hit Hallam, Nebraska back in 2004.

The tornado was also upgraded to an EF-5 class...the most forceful category, packing winds up to 296 miles an hour.

Eighteen people were killed as a result of the tornado and subsequent flooding in the Oklahoma City area.

The tornado that struck Moore, Oklahoma a little more than a week earlier, measured 1.3 miles in width.

It was also an EF-5 class tornado.

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