Скачать или смотреть Red Rock, Oklahoma Tornado Of 1991

To the south of several significant supercells in Kansas, another discrete storm produced a tornado at 6:30 p.m. CDT (23:30 UTC) which would reach F4 intensity, track for 66 miles (106 km), and reach a maximum width of 1,500 yards (1,400 m). The tornado began 2.5 miles (4.0 km) east of Garber and continued south of Billings. In this area, it reached F3 intensity, snapping power poles, toppling well pumps, demolishing a house, and destroying oil tanks. As it neared Interstate 35 and crossed into Noble County, the tornado first reached F4 intensity, flattening a house and debarking many trees. In neighboring Osage County, two farms were destroyed before the tornado continued into Osage County. There, it passed west of Pawhuska, toppling an oil rig with an 18-inch (460 mm) foundation. It lifted west-northwest of that city.[11] Along the tornado's path across sparsely populated areas, several county roads had portions of their asphalt stripped away.[40] Near Red Rock the tornado became particularly intense. In this area a University of Oklahoma chase team headed by Howard Bluestein utilized mobile doppler weather radar to analyze the tornado. The radar measured peak winds of 120–125 m/s (270–280 mph; 430–450 km/h) at the top of the tornado's funnel, suggesting the tornado probably had F5 winds close to the ground. At the time, this represented the strongest winds ever measured by radar, including the first measurements of F5 intensity winds.[98][99]