National Weather Service United States Department of Commerce

Strong to severe thunderstorms are expected Sunday afternoon and evening across parts of northeast Wyoming and western South Dakota. Some storms may become severe in northwest South Dakota, producing very large hail, gusty winds, and possibly an isolated tornado. As we head into the evening, a cold front will move through the area and may help the storms form a line of thunderstorms from the ND/SD border down toward the northern Black Hills. This line could bring damaging winds of 60 to 70 mph and hail over 1 inch. We’ll share updates as the forecast evolves. Make sure you have reliable ways to receive warnings on Sunday.
Another day with afternoon temps in the 80s to 90s for northeast Wyoming and western South Dakota. But a passing cold front will bring slightly cooler temperatures for Monday. But even with the ‘cool down’, we’ll still be above normal for this time of year.