Dear Science Mine: What is hoar frost, and how does it form? — Kris Douglass, Butte White frost or hoar frost is an amazing weather event that occurs in the cooler months of the year. Around Butte we ...
True frost, known also as hoar frost, occurs when a thin layer of moist air near the ground cools to below freezing and immediately forms ice crystals without first condensing as dew. These crystals ...
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