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The Red Rock Oklahoma Tornado
April 26, 1991

The spring of 1991 was loaded with tornado events and April 26th produced some of the most violent. It was a busy
chase day. I witnessed an impressive supercell that produced 2 funnels that were almost tornadoes. The second of
the two funnels came close the ground near the Oklahoma - Kansas border. It later developed a huge rotating
mesocyclone that produced the Windfield, Kansas tornado. Due to road problems I let the storm go before the
tornado formed. Dropping south into Oklahoma I intercepted a supercell that produced the so called Red Rock,
OK tornado shown here. After that I proceeded south and east to observe a large tornado crossing the Cimarron
Turnpike southeast of Stillwater, OK. Cars drove into the tornado while it crossed the 4-lane causing one fatality.
I later witnessed the same storm produce a huge tornado with a one mile wide damage path north of Tulsa. It
moved through sections of Skiatook and Collinsville silhouetted by green power line flashes and continious
lightning. It continued to the northeast as a large wedge until out of sight very near the town of Oologah where
heavy damage was reported.

Facts about the tornado in the following images: It moved from near Garber, OK to near the town of Pawhuska,
OK for a path length of 66 miles. A University of Oklahoma chase team used a portable doppler radar to measure
wind speeds of 286 MPH. This wind speed is usually associated with F-5 tornadoes, but F-4 damage was the worst
found and that's where the tornado was rated. The tornado destroyed a couple of homes and farms and was
responsible for six injuries. Fortunately it traveled across rural areas with low population density.