Widespread showers and thunderstorms will continue to develop late this afternoon and persist across central to west central
Iowa throughout the evening. A flash flood threat exist, especially during the night time hours, making the situation very
dangerous. Outdoor activities, such as high school football games this evening, are likely to be impacted with the heavy rain and
rounds of lightning.
A flash flood watch is in effect through Saturday morning. Widespread rainfall amounts of 1 to 3 inches of rain can be expected through Saturday morning, with locally higher amounts in excess of 3 inches likely. Rainfall rates will be heavy at times with the potential for rainfall amounts of 2 inches occurring in an hour or less.
Heavy rainfall may lead to rapid rises on local creeks and streams which may be high enough to cross roadways, especially low lying areas. Significant ponding of water on roadways is expected at times as well. Flash flooding at night is extremely dangerous and drivers should turn around if they come to an area where water is flowing over the road.
A flood watch will also be in effect through Saturday morning. Occasional rounds of showers and thunderstorms with heavy rain potential are expected through tonight. Additional amounts of 1 to 3 inches are possible, which would put storm total rains from Thursday through tonight in the 2 to 6 inch range. Flooding of low-lying area, urban areas and eventually rivers and streams could result.
In addition to the general flood threat, faster or flash flooding, could occur with some storms that may develop through this evening in southeast Nebraska and southwest Iowa.