EF1 tornado in Washington County, Arkansas

This tornado developed and moved across highly rugged and wooded terrain. It uprooted trees and snapped a few power poles. Based on this damage, maximum estimated wind in the tornado was 90 to 100 mph.

Severe thunderstorms moved through northwestern Arkansas during the evening of the 4th. The atmosphere became moderately unstable ahead of a cold front approaching from the north and a dry line approaching from the west. Deep layer and low level wind shear increased during the afternoon and evening across the area, with the approach of a strong upper level disturbance, and became very strong by early evening. The combination of moderately strong instability and strong to very strong wind shear resulted in some supercell thunderstorm structures, as well as a severe squall line that moved through the region. Multiple tornadoes occurred across northwestern Arkansas, along with damaging wind gusts.