Flash Flood in Madison County, Arkansas

Severe flash flooding resulted in portions of a number of roads being closed in and around Huntsville, as well as the need for several high water rescues.

Strong to severe thunderstorms developed into and across northwestern Arkansas during the afternoon of the 4th, in an unseasonably moist and unstable air mass ahead of an approaching cold front. The atmosphere became very unstable ahead of the thunderstorms. The deep-layer and low-level wind shear strengthened during the afternoon, in response to a strong storm system translating into the Southern Plains from the Southern Rockies. The combination of very unstable air and very strong wind shear resulted in the development of some supercell thunderstorms, which produced several tornadoes across Benton and Washington Counties. Locally heavy rainfall resulted in flash flooding across portions of Benton, Madison, and Franklin Counties.