the.com/hoarfrost
winter's overnight graffiti, drawn in ice needles on anything that dared to cool too far
means A grayish-white coating of feathery ice crystals that forms on cold surfaces when water vapor freezes directly onto them, typically on still, clear nights.
from The 'hoar' here is the same old word that gives us 'hoary' — meaning grayish-white with age, as in an old man's beard. From Old English 'har,' grizzled or venerable, our ancestors looked at the frosty fuzz coating fences and branches and saw something wonderfully apt: the world grown an old man's whiskers overnight. So 'hoarfrost' is, quite literally, gray-bearded frost.
- name origin
- hoar means ancient gray, like a bearded elder
- skips liquid
- vapor freezes straight to crystal, no dew stage
- needs calm
- forms only on still, clear, freezing nights
- feathered ice
- crystals grow as delicate branching needles and plates
- surface trick
- object must be colder than the surrounding air
mount washington peak — new hampshire's highest peak regularly accumulates thick hoarfrost coatings in winter due to extreme cold and moisture at 6,288 feet elevation
yellowstone geysers — hot springs create dense hoarfrost formations on surrounding vegetation and rocks in wyoming's geothermal areas during winter months
siberian larch forests — eastern siberia experiences extreme hoarfrost buildup on trees in temperatures dropping below -40°c, creating 'shaggy' frozen landscapes