Flash Flood in Wyandot County, Ohio

A main thruway in Wyandot County sustained a washout due to heavy rain on the 19th. The eastbound lanes of U.S. 30 near Upper Sandusky the road closure was just east of U.S. 23 in Wyandot County. The damage was caused by a 90-inch culvert, that washed out and eroded about 20 feet under the eastbound lane to the center line. Most of the flood came as overland runoff from agricultural fields adjacent to the highway.

A slow moving upper low over Illinois combined with a conveyor belt of humid air over Ohio supported widespread showers and thunderstorms over southern and central Ohio on the afternoon and evening of the 18th. The weather conditions supported not severe weather but heavy rain. Rain rates of 2 inches an hour or higher were observed with storms that trained, or repeated over the same areas. Overnight the low sank further south and drier air filtered into north and eastern counties which reduced their flood risk. However, it set up a boundary with warmer and moist air from Bowling Green to Mt. Vernon where moderate to heavy rain fell during the early morning hours of the 19th. A flood watch had been issued on the evening of the 18th through late morning on the 19th. The heaviest rainfall was measured around 3 to 4 inches in portions of Wood, Marion, Wyandot, Knox, and Morrow Counties. Several roads were flooded with mainly minor impacts. A flash flood occurred in Upper Sandusky as US 30 eastbound lanes were closed near Upper Sandusky after flood waters washed out a culvert. There were multiple vehicles stalled in the City of Marion due to high water. The heavy rain in Wood County resulted in major flooding on the Portage River at Woodville by the 20th. The high river levels combined with high lake levels at the mouth to produce additional flooding in areas downstream that don't typically flood.