Hail in Sequoyah County, Oklahoma

Strong to severe thunderstorms developed across north central Oklahoma during the early afternoon of the 8th, along a cold front approaching the region from the northwest. The thunderstorms spread across eastern Oklahoma during the mid afternoon and evening. The atmosphere became moderately unstable during the afternoon ahead of the cold front in eastern Oklahoma, and deep-layer wind shear increased across the region with the approach of an upper level disturbance. The combination of moderately strong instability and strong deep-layer wind shear resulted in some thunderstorms evolving into supercell thunderstorms, the strongest of which produced large hail up to three inches in diameter and damaging wind.