Severe thunderstorms slowly moved through eastern Iowa late Saturday afternoon and night, bringing torrential rain, frequent lightning, large hail up to quarter-size and damaging winds. The National Weather Service says the strongest winds occurred in Buchanan and Delaware counties between 8 and 11 pm Saturday night. Along with numerous Severe Thunderstorm Warnings across all counties in the KMCH listening area, a Tornado Warning was also issued for northern Buchanan County based on radar-indicated rotation – a confirmed tornado was not spotted.
Several damage reports have come in to the National Weather Service. Buchanan County Emergency Management reported a roof was blown off a home two miles south of Winthrop on Saturday night. Trees and power lines were downed by strong winds in West Union, with branches and power lines also down in the Fayette area.
Multiple roads have been reported washed out throughout Buchanan County, as well as in portions of Delaware County. Delaware County Secondary Roads Department is highly discouraging travel on roads west of Rocky Ridge (145th Avenue and 130th Avenue) and north of Old Highway 20 due to washouts that need repair. Staff has been out this morning assessing each road for damages and beginning repairs.
One-inch hail was reported in Independence, with 0.25-inch hail reported in Manchester Saturday night.
Rainfall totals over two inches were reported across Buchanan, Delaware, Linn, Jones, Clayton and Fayette counties. The highest reported rainfall totals include six inches in just two hours in the Masonville area, as well as five inches east of Dundee, nearly five inches at Backbone Beach and three and a half inches of rain (in just one hour) one mile north of Manchester.
The torrential rains have led to flooding across eastern Iowa, with Flood Warnings currently in effect for the Maquoketa River in Manchester and the Turkey River in Garber and Elkader. Current warnings are posted on kmch.com and our KMCH Facebook page.
Stay safe out there today… do NOT cross any flooded roadways. Report washed out roads or other damage to local law enforcement or Delaware County Emergency Management.
Share your rainfall totals, as well as photos of flooding and storm damage, on our KMCH Facebook page. Thanks to Jerry Alden for the photo above taken north of Masonville.