EF1 tornado in Delaware County, Oklahoma

This tornado developed along the leading edge of a strong convective line of thunderstorms, west of County Road 586, and south of Eucha Lake. It moved northeast across Highway 59, and dissipated north of County Road 458, and east of Eucha Lake. The tornado snapped and uprooted numerous trees along its path. Based on this damage, maximum estimated wind in the tornado was 95 to 105 mph.

Severe thunderstorms developed across central Oklahoma during the afternoon of the 10th, along a cold front that was moving into the area. These storms moved eastward and across eastern Oklahoma during the evening. In response to a strong upper level disturbance translating into the Southern Plains, wind fields as well as wind shear strengthened considerably during the evening across eastern Oklahoma ahead of the approaching thunderstorms. The very strong wind shear combined with moderately strong instability that existed across the area, resulted in some supercell thunderstorms, as well as the eventual evolution of a squall line. One of the supercells produced a tornado, and the squall line produced several tornadoes as it moved through eastern Oklahoma. Large hail up to two inches in diameter, and damaging wind gusts also occurred from these thunderstorms.