EF1 tornado in Jefferson Parish, Louisiana

An EF1 tornado touched down on the east bank of the MS River snapping and uprooting trees and breaking power poles near Jefferson Highway and Airline Highway. Empty rail cars were also derailed just to the south of Airline Highway. This tornado exited Jefferson Parish Parish, entering Orleans Parish near the intersection of Bamboo Road and Palmetto Street.

A mesoscale convective system formed on the eastern side of Post-Tropical Storm Arthur on June 18th. Favorable low level winds allowed for multiple mini-supercells to form on the leading edge of the mesoscale convective system resulting in several tornadoes impacting the Houma and New Orleans metro areas. These tornadoes were rated as EF-0 and EF-1 events. Additionally, the mesoscale convective complex tapped into a region of deep tropical moisture with atmospheric moisture content well above normal levels for mid-June. This resulted in several significant flash flooding events in portions of the Houma and New Orleans metro areas including the cities of Houma, Kenner, and Slidell. Another area of heavy rainfall from thunderstorms formed over central Louisiana near the center of Post-Tropical Storm Arthur producing flash flooding in portions of Pointe Coupee Parish. Lingering moisture and weak upper level troughing associated with the slow moving remnants of Post-Tropical Storm Arthur produced additional thunderstorm activity on June 19th. This activity was focused in metro New Orleans where a brief EF-0 tornado developed in the community of Arabi. On June 20th, another band of thunderstorms developed along a lingering boundary stretching from coastal Louisiana toward New Orleans. This band of thunderstorms produced heavy rainfall and impacted portions of the Houma and New Orleans metro areas producing a few flash flooding events in Houma, Destrehan, and Kenner.