Investigators said they were unable to determine if anything illegal occurred because the agency leaders did not document their rationale for the reassignments.
“In an extreme dust year, we can see the snowpack disappear on the order of 2 months early,” said Jeff Deems of the University of Colorado.
At least when it comes to heat, the reason for the new certainty is running models which show heat of this extent would not have been possible.
Interior Secretary Ryan Zinke has started a major push to reorganize the agency and get thousands of employees out of Washington D.C.
The Associated Press followed U.S. ski and snowboard teams to a glacier in Europe, where they found snow to practice on before PyeongChang.
The announcement comes a day before a Paris gathering called the "One Planet Summit" co-hosted by the U.N. and the World Bank.
Colorado’s average temperature for the month was just over 41 degrees, nearly 8 degrees above the state's average for the entire 20th Century.
Colorado broke heat records in November. That could hurt next season's yield.