Hail in Greer County, Oklahoma

Numerous severe thunderstorms impacted portions of central and southern Oklahoma and western-north Texas early on the morning of the 2nd. Synoptically, this convective episode was driven by the approach of a weak shortwave trough rounding the periphery of a broader upper system across the Central and Northern Plains. Very strong elevated instability and sufficient wind shear promoted organized thunderstorm clusters and eventually a semi-organized line across the aforementioned region, producing large hail, thunderstorm wind damage and a tornado. Heavy rainfall contributed to flash flooding, particularly across parts of southern Oklahoma that continued to be impacted by prolonged river and stream flooding.