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.
Meteorologists issued the warning 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.
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.