...Significant flash flooding occurred over the Evansville area and parts of Wabash County Illinois the night of July 16th...
Widespread street flooding occurred in Vanderburgh County after 5 to 10 inches of rain fell in a couple of hours. The rain began at Evansville about 10:30 P.M., and by midnight measured 1.47 inches at the Evansville airport. Radar indicated considerably heavier rainfall rates over downtown Evansville and western Vanderburgh County.
The following are some radar images of the event:
One-hour rainfall amounts ending at 12:45 A.M. July 17, as estimated by the Paducah radar. The rates compared well to actual observations at the airport. The orange shades correspond to 3 inches per hour, yellow is about 2 inches, and purple shades are 1.5 to 2 inches. Green and blue shades are one-half to 1.5 inches.
Below is the "storm-total" rainfall estimate ending at 1 A.M. (Additional heavy rain fell after this time). The shades of red indicate 5-plus inches. Yellow and gold colors indicate 2.5 to 5 inches. Green shades indicate 1 to 2.5 inches.
Heavy rain producing thunderstorms repeatedly developed over the lower Wabash Valley, then moved southeast across the Evansville metro area. Below is a radar image at about 12:30 A.M. Movement of the storms was southeast at 15 to 20 MPH. Interstates and parkways are shown on the map in yellow. Magenta dashes are lightning strikes in the past 15 minutes.
Below is a storm total precipitation product from Saturday afternoon.
It depicts an 8 to 10 inch area in northwest Vanderburgh county. A spotter in the downtown Evansville area reported 4.88 inches of rain.
The Vanderburgh county EMA reported 175 to 200 residential structures
were affected by the flooding. In one trailer park alone, 150 homes were
evacuated with the water 6 feet deep in places. In the downtown area, 35
homes were affected by the flooding. No dollar damage estimates were available.