ATMOSPHERIC
Frost
Clear, calm, freezing night — vapor deposits straight to ice.
How it works
A clear, calm, freezing night lets water vapor deposit straight onto surfaces as ice crystals, edging grass, leaves, and windows in white. It needs a clear, calm night cold enough that surfaces drop below freezing, which can happen even when the air itself reads a degree or two above zero.
See when it's likely near you
Shotcast scores every hour of your forecast for frost across your saved locations, so you know when it's worth heading out.