Daily Postcard: A Hoarfrost sunrise on Nov. 26 along US 64 between Tres Piedrs and Tierra Amarilla where it covers trees and vegetation in the Spruce-Fir zone of the Tusas Mountains. Hoarfrost is a deposit of ice crystals on objects exposed to the free air. It is formed by direct condensation of water vapor to ice at temperatures below freezing and occurs when air is brought to its frost point by cooling. Hoarfrost is formed by a process analogous to that by which dew is formed on similar objects, except that, in the case of dew, the saturation point of the air mass is above freezing. Source: britannica.com. Photo by Randal Pair
