Drought-plagued Arizona could see state-funded drones spraying microscopic silver iodide particles into mountain clouds to boost snowfall if proponents get their way.

Resorts are increasingly seeking solutions to freshen up the brown slopes spanning the American West this winter, even as the East Coast grapples with back-to-back storms.

Even with air temperatures below freezing, snow and ice can still melt. Here’s why warm sun, ground heat and humidity matter ...