BILLINGS, Mont. — The Yellowstone National Park area's weather forecast the morning of June 12 seemed fairly tame: warmer temperatures and rain showers would accelerate mountain snow melt and could produce "minor flooding." A National Weather Service bulletin recommended moving livestock from low-lying areas but made no mention of danger to people.
By nightfall, after several inches of rain fell on a deep spring snowpack, there were record-shattering floods.
