Thunderstorm Wind in Perry County, Indiana

Several trees were uprooted with branches snapped on the southeast side of Tell City.

During the evening and early overnight hours on May 7th and 8th, a cold front moved eastward from the mid Mississippi Valley into the Ohio Valley. Ample instability was present in the warm sector ahead of the front, though poor mid-level lapse rates initially hindered storm development across the region. Just before sunset, a few discrete cells began to develop along the Ohio River in southern Indiana, quickly gaining supercell characteristics in the presence of strong deep-layer shear. While weak mid-level lapse rates prevented explosive growth of these cells, they were strong enough to produce two weak tornadoes in southern Indiana. The tornadic cells also produced minor straight-line wind damage after the tornado lifted. Sporadic straight-line wind damage was also observed with another wave of storms later during the early morning hours of May 8th.