The National Weather Service said Saturday that the Neosho River at Commerce is expected to crest Monday at 21 feet, at which time flood waters are expected to cross Oklahoma Highway 125 at Riverview Park in Miami.
As of 2 p.m. Saturday, the U.S. Army Corps of Engineers reported the Grand Lake pool level to be 747.22 feet.
The lake is expected to crest Monday at just over 748 mean sea level, according to the Corps.
Nine small gates were open at the Pensacola Dam as the Grand River Dam Authority released water into the reservoir at 25,000 cubic feet per second on Saturday.
The Neosho River flow at Commerce, as of 2 p.m. Saturday afternoon, was moving at 33,236 cubic feet per second while the river rose to 19 feet -4r feet above flood stage.
Weather officials said Saturday that northeast Oklahoma and southeast Kansas were predicted to see heavy rainfall events through the night, putting Ottawa County at risk of moderate flooding.
As of 2 p.m. Saturday, river gauges at LeRoy, Lane and Quenemo, all points upstream from Commerce, indicated moderate flooding.
In Ottawa County, recent rainfall amounts pushed the year-to-date level to 27.67 inches.
In 2006, Ottawa County saw 33.34 inches of rainfall during the full calendar year.