The Threshold at Which Snow Starts Irreversibly Disappearing

In January 1995, when The Atlantic published “In Praise of Snow,” Cullen Murphy’s opus to frozen precipitation, snow was still a mysterious substance, coming and going enigmatically, confounding forecasters’ attempts to make long-term predictions. Climate change registered to snow hydrologists as a future problem, but for the most part their job remained squarely hydrology: working out the ticktock of a highly variable yet presumably coherent water cycle. “We still don’t know many fundamental things about snow,” Murphy wrote. “Nor do we understand its relation to weather and to climate—the dynamics of climate being one of the perennials on the ‘must figure out’ list of science.”

In January 2024, at long last, someone has figured out a formula of sorts for how snow reacts to climate