EF2 tornado in Jefferson County, Ohio

A supercell thunderstorm, embedded within a broken line of thunderstorms, produced a series of tornadoes as it tracked across eastern Ohio, the northern West Virginia panhandle, and western Pennsylvania during the early morning hours on May 8th.

The most significant tornado developed across northwest Jefferson County, Ohio around 12:54 AM, along County Highway 55. Initially, it snapped and uprooted numerous hardwood trees. As the tornado moved east along Highway 55, it took roofs off multiple homes, overturned and tossed a mobile home, and shifted a single family residence off its foundation. The twister then moved into the center of Irondale, where numerous hardwood and softwood trees were uprooted and snapped, all consistent with EF-2 damage. The tornado was able to descend and climb through steep terrain, with hundreds of trees observed damaged or destroyed from the Highway 55 ridge line and along a steep several hundred foot escarpment. Several trees fell onto homes causing damage. A metal building system lost its roof and part of the side walls. The tornado continued to move east causing downed trees along State Route 213 in Hammondsville, eastward to the Ohio river.

Potent low pressure tracked across the Upper Midwest from May 7th into May 8th, pushing an occluded boundary across the Upper Ohio Valley. Strong warm and moist advection kept conditions favorable for convection into the overnight hours, with high levels of shear and a surface trough also supporting storm development. Cyclic supercell structures supported higher-end straight line wind damage, as well as three tornadoes in eastern Ohio. One of these ended up being one of the stronger and more significant tornadoes in the region's recent history, a high-end EF2 that ultimately tracked across 15 miles and three states.