Hoar Frost
Feb/24/2021 04:36 PM
HOAR FROST is what results when weather conditions are just right. It usually forms when the air is dry, skies are clear, and temperatures drop so quickly that the surfaces of leaf litter, grasses, even snowfields cool more quickly than their warmer, moister interiors. The warmer, moister air migrates outward toward the dry air but the freezing cold exposed surfaces cause the water vapor to condense directly on them as ice crystals. Once the process begins the crystals grow until the air and ground temperatures equalize and the moist flow ends.
The name originates from Old English where hoar is defined as “showing signs of old age.” It was thought to make trees resemble a white beard through its feathery or hairy appearance.
For some reason Hoar frost is a common sight along the Mill River. I'm guessing the liquid water is always warmer than the supercooled air over the fields making the perfect conditions for this crystal enrobement.
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The name originates from Old English where hoar is defined as “showing signs of old age.” It was thought to make trees resemble a white beard through its feathery or hairy appearance.
For some reason Hoar frost is a common sight along the Mill River. I'm guessing the liquid water is always warmer than the supercooled air over the fields making the perfect conditions for this crystal enrobement.
.
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