EF1 tornado in Adair County, Oklahoma

This is the first segment of a two segment tornado. The tornado developed just west of Stilwell City Lake. It moved east-northeast toward Blanch, and then northeast across the west and north sides of Stilwell. The tornado moved across Fairfield and then turned east-northeast before crossing into Washington County, Arkansas. Many trees were uprooted and some were snapped by this tornado, homes were damaged, outbuildings were destroyed, and power poles were blown down. A tornadic debris signature was noted from the KSRX WSR-88D. Based on this damage, maximum estimated wind in this segment of the tornado was 95 to 105 mph.

Severe thunderstorms developed over central Oklahoma along and ahead of a dry line during the afternoon of the 19th, as an upper level disturbance approached the Southern Plains. These thunderstorms moved northeast off the dry line and across portions of eastern Oklahoma during the mid afternoon and evening hours. The atmosphere east of the dry line across eastern Oklahoma became very unstable during the afternoon and evening, and this instability combined with strong deep-layer and low-level wind shear, resulted in the development of a few supercell thunderstorms and a severe squall line. Multiple tornadoes, large hail slightly larger than golf ball size, and damaging wind gusts occurred with these thunderstorms across eastern Oklahoma. Locally heavy rainfall also produced some localized flash flooding.