USGS: Global Warming Drives Rockies Snowpack Loss Unrivaled in 800 Years, Threatens Western Water Supply: "pA US Geological Survey study released today suggests that snowpack declines in the Rocky Mountains over the last 30 years are unusual compared to the past few centuries. Prior studies by the USGS and other institutions attribute the decline to unusual springtime warming, more precipitation falling now as rain rather than snow and earlier snowmelt. [...]/p"