The Flood Watch is extended for the following rivers in Iowa. Nebraska. Missouri. Missouri River Near Blair affecting Harrison, Pottawattamie and Washington Counties. Missouri River At Nebraska City affecting Otoe and Fremont Counties. Missouri River At Omaha affecting Pottawattamie, Sarpy and Douglas Counties. Missouri River At Brownville affecting Atchison and Nemaha Counties. Missouri River At Decatur affecting Monona and Burt Counties. Missouri River At Rulo affecting Richardson and Holt Counties. Missouri River at Plattsmouth affecting Mills and Cass Counties. .Very heavy rainfall occurred in eastern South Dakota and northwest Iowa Thursday night. Rainfall amounts of 4 to 6 inches were common over a large area with some areas reporting over 7 inches of rain or more. The runoff from this rain could potentially bring the Missouri River, below Gavins Point Dam, well into flood stage. More rain occurred last night, only worsening the situation. Due to the large amount of water coming down the river, the river will not crest until mid to late next week with some locations reaching moderate flood stage. * WHAT. Flooding is expected. * WHERE. Missouri River at Plattsmouth. * WHEN. From late Monday night until further notice. * IMPACTS. At 32.0 feet, The water treatment plant for Plattsmouth begins to flood. In addition, River Road begins to flood. * ADDITIONAL DETAILS. - At 5:15 AM CDT Saturday the stage was 20.7 feet. or 5.4 feet below flood stage. - Forecast. Flood stage may be reached early Tuesday morning. - Flood stage is 26.0 feet.