Article Photos: Largest and deadliest May 24 tornado in Oklahoma ranked an EF5

A half-mile-wide tornado moves north in Canadian County having just crossed SH 3, the Northwest Expressway, west of SH 4 moving towards Piedmont Tuesday, May 24, 2011. Photo by Paul B. Southerland, The Oklahoman

A half-mile-wide tornado moves north in Canadian County having just crossed SH 3, the Northwest Expressway, west of SH 4 moving towards Piedmont Tuesday, May 24, 2011. Photo by Paul B. Southerland, The Oklahoman