Biggest Tornado Ever

The largest tornado ever recorded by width is the 2013 El Reno tornado in Oklahoma, which reached about 2.6 miles (4.2 km) across.

The largest tornado ever recorded by width is the 2013 El Reno tornado in Oklahoma, which reached about 2.6 miles (4.2 km) across. If the topic is interpreted as the longest tornado track, the Tri-State tornado of 1925 is the record holder for path length. Tornado records distinguish between width, path length, duration, and intensity, so there is no single universal “biggest” tornado.

What “biggest” can mean

In tornado records, “biggest” may refer to width, track length, or overall destructiveness. The widest officially recorded tornado is different from the longest-tracked or deadliest tornado.

2013 El Reno tornado

The El Reno tornado of May 31, 2013, is the widest tornado on record, peaking at 2.6 miles (4.2 km) across. It was an unusually large, intense, and unpredictable tornado in central Oklahoma. The tornado was rain-wrapped and multiple-vortex, and the National Weather Service called it the “most dangerous tornado in storm observing history.” It caused eight deaths and 151 injuries. Initially rated EF3, later radar data suggested stronger internal winds.

Tri-State tornado

The Tri-State tornado of March 18, 1925, is often described as the most extreme tornado in recorded history because of its exceptional path length and duration. It holds the record for the longest path length in many historical accounts.

Why records differ

Tornado records are limited by historical observation methods and by the fact that modern rating systems are based largely on damage. This means older storms and radar-measured storms are not always directly comparable.