A potent storm system will affect much of the Northern Plains into the weekend. This will bring scattered showers and thunderstorms to portions of the region today through Sunday. Some of these thunderstorms may be severe this afternoon across the southern James River Valley. Additional thunderstorms, possibly severe, will develop along a cold front across eastern Montana this evening. These storms are forecast to move across western and central North Dakota tonight. In addition to the severe weather, locally heavy rainfall is also possible late this afternoon and tonight. By Sunday, an upper level low pressure system will move over the area. This will bring a few scattered showers.
Temperatures will vary greatly from northwest to southeast today...with lower 90s possible in the James River Valley...with only mid 70s over the northwest. These cooler temperatures will overspread the area on Saturday and Sunday.