 Occasional rain and thunderstorm activity will occur through Sunday across the northern plains. World Weather Incorporated says rainfall totals will be mostly a quarter of an inch or less, with the heaviest amounts in the eastern Dakotas and Minnesota. Additional rains are in the forecast during the last week of July. Temperatures are expected to be in the 70s and 80s for most of the region through Sunday, with a few 90s and even a low 100 reading in portions of Montana.