Western North Dakota in tornado watch
Portions of western North Dakota, eastern Montana and are in a long-range tornado watch until 8 p.m. Mountain Time, according to the National Weather Service in Bismarck.
As of 4:37 MDT, much of the western part of the state is also under a flash flood watch, including Stark County, Dickinson, Killdeer and Medora.
Meteorologists issued the tornado watch for Adams, Billings, Bowman, Golden Valley, McKenzie and Slope counties in North Dakota, Butte, Harding, Lawrence, Meade, Pennington and Perkins in South Dakota, and Carter, Custer, Dawson, Fallon, Garfield, McCone, Prairie, Richland and Wibuax counties in Montana.
The flash flood watch, in effect through Wednesday morning, applies to Divide, WIliams, McKenzie, Dunn, Golden Valley, Billions, Stark, Slope, Hettinger, Bowman and Adams counties. The National Weather Service cautions not to drive across a water-covered roadway.
Multiple lows are feeding into a storm that is moving northeast across eastern Montana.
“That line is expected to move east, northest across the area,” NWS meteorologist Janine Vining said. “We could be in for an active night.”
Half-dollar sized hail was reported in Fallon and Custer counties, Vining said. The line of storms is moving at 20 mph and should be in North Dakota late afternoon. If the storm hold together, it could produce damaging hail and winds. There is also a potential for rotating clouds and tornadoes.
“The whole system is dangerous because it looks like there is a lot of potential for rotation,” Vining said.