BLOG: What caused ice crystals to form on Grand Lake?

Posted at 4:36 PM, Jan 17, 2018
and last updated 2018-01-17 17:36:29-05

2 Works for You viewer Bruce Dubois sent us a picture (see above) of ice crystals on frozen Grand Lake on January 17, 2018.

It is called hoarfrost and happens when water vapor molecules (from the fog they had in the morning) contact a subfreezing surface (the frozen lake). The water vapor molecules jump directly from the gas state to the solid state leading to the coating of ice crystals. This process is known as deposition.

The word hoar comes from an Old English word that means: "showing signs of old age." If these ice crystals were covering trees, it would look like white hair.

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