Porter Fox (the features editor at Powder magazine):
Officials canceled two Olympic test events last February in Sochi after several days of temperatures above 60 degrees Fahrenheit and a lack of snowfall had left ski trails bare and brown in spots. That situation led the climatologist Daniel Scott, a professor of global change and tourism at the University of Waterloo in Ontario, to analyze potential venues for future Winter Games. His thought was that with a rise in the average global temperature of more than 7 degrees Fahrenheit possible by 2100, there might not be that many snowy regions left in which to hold the Games. He concluded that of the 19 cities that have hosted the Winter Olympics, as few as 10 might be cold enough by midcentury to host them again. By 2100, that number shrinks to 6. ...
The effect on the ski industry has already been significant. Between 1999 and 2010, low snowfall years cost the industry $1 billion and up to 27,000 jobs. Oregon took the biggest hit out West, with 31 percent fewer skier visits during low snow years. Next was Washington at 28 percent, Utah at 14 percent and Colorado at 7.7 percent.
The winter sports industry contributes $66 billion annually to the nation’s economy, and supports more than 960,000 jobs across 38 states, according to the Outdoor Industry Association. A surprisingly large sector of the United States economy appears to be teetering on the brink.
Much of these environmental data come from a 2012 report, “Climate Impacts on the Winter Tourism Economy in the United States,” by two University of New Hampshire researchers, Elizabeth Burakowski and Matthew Magnusson.
As always, with this sort of change, the effect on GDP and jobs is likely to be negligible as people adapt and find substitute activities. The more significant loss is consumer surplus - the willingness to pay for skiiing over and above the money spent. That is harder to replace.