Do you know the difference between Hoar Frost and Rime Ice? Most people don’t. Rime ice is a deposit of ice formed during a freezing fog, often accompanied by high wind and temperatures well below freezing. The supercooled water droplets freeze rapidly when coming in contact with objects such as branches, fence posts, etc.. Rime ice definition from the American Meteorological Society's Glossary of Meteorology:“A white or milky and opaque granular deposit of ice formed by the rapid freezing of supercooled water drops as they impinge upon an exposed object. It is denser and harder than hoarfrost, but lighter, softer,...