A surge of supercell thunderstorms over the last week has pummeled Wyoming, Montana and Colorado with golf ball- to baseball-sized hail that’s obliterated windshields, tore pieces off of homes and killed wildlife. Haden Wichman was branding calves near Kolin, Montana, on Saturday evening when he saw dark storm clouds on the horizon. “We went up the road to watch it, because we knew the big white cloud was going to come down the creek bottom,” he told Cowboy State Daily. “It was like a flash flood of golf ball-sized hail and 2 inches of rain that came with it.” After...