El Reno tornado widest in U.S. history
Wednesday, June 5, 2013, 8:05 -
The tornado that leveled much of El Reno, Oklahoma last week is a record breaker.
At 4.2 kilometres wide, Friday's tornado is the widest U.S. twister ever.
The 4 km wide, deadly #tornado in Oklahoma last Friday had winds around 475 km/hr. 19 killed from twister and flooding rain from storm.— Chris Murphy TWN (@chris_m_twn) June 5, 2013
"With this investigation...the tornado has been upgraded to an EF-5 tornado based on velocity data from the research mobile radar data," the National Weather Service said in a statement on Tuesday.
The tornado was initially rated as an EF-3 storm on the Enhanced Fujita scale.
The twister tore open brick houses, ripped off roofs, downed trees, uprooted power lines and flattened entire neighbourhoods.
At least 19 people died as a result of the storm.
With files from CNN