Recent heavy rains have caused flooding in the upper Plains and prompted the U.S. Army Corps of Engineers to reduce water releases into the Missouri River, which had been accelerated in response to earlier excessive rains.
The Corps of Engineers said that rainfall over the past two weeks has been 200 percent to 600 percent more than normal throughout the entire Missouri River Basin and could again overwhelm lowland areas.
In the past several days, Montana, North Dakota and South Dakota have recorded heavy rainfall totals. Some tributaries to the Missouri River again approached or topped record flood stages.
The Missouri River has been above flood stage since March 13. As of Sept. 13, runoff from the Upper Missouri River north of Sioux City, Iowa, has reached 49.9 million acre feet, topping runoff from 1997. As of now, 2019 runoff is the second highest in 121 years of records, behind only 2011. Source: DTN