A flood warning for the Heart River near Mandan remains in effect through at least Monday afternoon, according to the National Weather Service.
An ice jam is causing elevated water levels and is expected to continue until temperatures warm up, said Meteorologist Patrick Ayd.
Rapidly changing water levels are expected as ice moves through the river channel.
County Road 82 between 51st and 54th streets and County Road 140 north of Hebron are closed within Morton County due to flooding. Several other roads throughout the county have high water along the edges and motorists should drive cautiously, the Morton County Sheriff’s Office said.
Lt. Bryan Steele of the Morton County Sheriff’s Office said Sunday the agency is asking people to stay out of the Interstate 94 Business Loop west of Mandan because businesses were trying to get equipment out of the area.
Officials also were monitoring flooding conditions in the area of Fort Abraham Lincoln State Park.
A flood warning also continues for the Cannonball River at Breien affecting Morton and Sioux counties, according to the National Weather Service. The Cannonball River will remain between 12.5 and 13 feet through at least Thursday. At 13 feet, the southeast part of Breien is subject to flooding.
The Knife River crested at Hazen and is expected to continue slowly falling to below flood stage.
The National Weather Service also is monitoring unusually high water levels on the Missouri River through Mandan and Bismarck. The high water is caused by increasing flows from the Knife River and other tributaries as well as ice cover that remains intact.
Damaging high water is not anticipated, but if the ice begins to break up, conditions could change quickly, Ayd said. The Weather Service advises people with interests along the Missouri River to closely monitor conditions and updates.
“Ice jams are very unpredictable,” Ayd said.
Temperatures are expected to warm up in Bismarck-Mandan this week to the upper 50s to lower 60s on Tuesday and Wednesday, the National Weather Service said.
(Reach Amy Dalrymple at 701-250-8267 or Amy.Dalrymple@bismarcktribune.com)
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