The strongest of these , rated EF3 with winds of 145 mph ( 233 km\/h ) , reached 0.75 mi ( 1.21 km ) in width along its 23.45 mi ( 37.74 km ) track and caused significant damage along Mississippi Highway 19 .
It had winds of 145 mph ( 233 km\/h ) , and caused major damage along Mississippi Highway 19 .