Hail in Wetzel County, West Virginia

A warm front pushed a swath of light to moderate showers across the Upper Ohio Valley during the morning and midday hours of May 11th. Behind this boundary, the increase in low-level moisture and partial clearing helped instability to recover fairly rapidly, and allowed for an increase in shear as well. Discrete storms then fired ahead of an advancing cold front during the early afternoon, and then they advanced across southwest Pennsylvania and northern West Virginia through the remainder of the afternoon and early evening. In eastern Ohio, all storm reports were of hail between 0.75 and 1.25 inch diameter, and such reports were also received in West Virginia in a few cases. Storms closer to the PA/WV border were able to take advantage of sufficient low-level instability and surface vorticity to allow for the development of three tornadoes in Pennsylvania, one of which briefly crossed into Preston County, WV.