Increasing moisture quickly moved up the Ohio River Valley on the morning of the 3rd into a developing east to west frontal zone. The first of several thunderstorm complexes moved from west to east into extreme southern Ohio during the early afternoon on Tuesday, the 3rd. The west to east band of training thunderstorms shifted slightly north overnight, to include Jackson, Vinton, Athens, Meigs, Morgan, and Washington Counties. A tornado warning, during the evening of the 3rd, prompted Ohio University at Athens to enact emergency precautions for their dormitories. However, no tornado occurred.
The ground was already wetter than normal in the Hocking Valley on north, from above normal rainfall in May. By dawn on the 4th, the highest rain totals were over 2 inches around Jackson on northeast toward Athens.
These rain amounts over the wet terrain, caused some flash flooding on small streams late on the 3rd and early on the 4th.
The west to east band of convection sank slightly back to the south during the daylight hours on Wednesday, the 4th. Portions of Jackson, Meigs, Gallia, and Lawrence Counties saw the heaviest rains then. Small stream flooding was widespread with numerous road closures. Lawrence County was hit the hardest with small stream flooding.
Hail and some wind damage occurred with the convection.
The last of the significant showers exited after 2100E on the 4th.
Rain totals over a 30 to 36 hour time frame were 2.5 to 4.5 inches. A few specific preliminary totals from cooperative observers included Waterloo with 4.5 inches, Jackson 4.3 inches, Gallipolis 3.8 inches, Salem Center 3.4 inches, South Point 3.1 inches, and Athens, McArthur, plus McConnelsville 2.9 inches.