Winds knock over tractor trailer video: Semi knocked on its side near El Reno, Oklahoma

NEAR EL RENO, Oklahoma-- Video continues emerging of the power of storms that recently devastated several states in the central part of the country.

Storm chaser Daniel Shaw recorded video of winds flipping a tractor trailer on its side.

It was traveling along I-40 near El Reno, Oklahoma.

Along with flipping big rigs, the storm system uprooted trees and mowed down power lines near Oklahoma City.

Winds also ripped off part of a roof at an airport terminal where about 1500 people had taken shelter.

Meanwhile, the death toll rose to at least 16 as the search continue for six missing people. 4 had sought shelter in storm drains, only to be swept away by rising water.