Thunderstorm Wind in Pawnee County, Oklahoma

Strong thunderstorm wind blew much of the roof off of an outbuilding.

Strong to severe thunderstorms developed into northeastern Oklahoma during the evening of the 19th, as a cold front approached the area. Very strong instability combined with increasing deep layer shear to result in one of the thunderstorms evolving into a supercell. This storm was high-based with a deep layer of relatively dry air between the cloud base and the ground. This environment enabled the storm to produce very strong and damaging downbursts, which likely gusted to up to 95 mph at times. The storm moved across Pawnee Lake in Pawnee County, rolling multiple recreational vehicles at a campground. One person was killed when the RV he was in rolled, and two others were injured. This severe thunderstorm also produced large hail up to golf ball size.