EF0 tornado in Canadian County, Oklahoma

This was the westernmost of what for a few minutes were three simultaneous tornadoes in Canadian County and was observed by a number of storm chasers and spotters. The tornado developed southeast of Southwest 15th Street and Alfadale Street, and it damaged a barn and blew a hay bale south-southeast along Southwest 15th Street. The tornado initially moved north or north-northeast before turning northwest and crossing US Highway 81 about a half mile north of Reno Avenue. Street signs were blown over along US-81 before the tornado dissipated west of the highway.

Significant severe weather occurred across portions of western into central Oklahoma from the late afternoon of the 19th through early morning on the 20th. Aloft, a strong and compact upper wave moved across portions of Kansas during the afternoon. While most severe weather outcomes were expected further north of the WFO Norman area, a few supercell thunderstorms developed along a trailing dryline near the 100th meridian. This included a powerful supercell thunderstorm that moved from Hemphill County, Texas (WFO Amarillo, Texas) into portions of Roger Mills/Custer/Washita/Blaine/Canadian/Oklahoma counties during the afternoon into late evening hours. This thunderstorm was responsible for thirteen (13) tornadoes, including significant tornadoes west of Custer City and near Yukon, Oklahoma. Significant damaging wind gusts/damage and large to very large hail also occurred with this thunderstorm. Additional hail-producing supercells developed into portions of northwestern Oklahoma during the evening, with one becoming briefly tornadic during the late evening across Woods County, Oklahoma.