Sunday Morning’s Hoar Frost Event

If you were out early this morning, you witnessed the beautiful view of hoar frost. According to the American Meteorological Society, hoar frost is the deposit of interlocking ice crystals (hoar crystals) formed by direct deposition on objects, usually those of small diameter freely exposed to the air, such as tree branches, plant stems and leaf edges, wires, poles, etc. Depositional frost occurs when the dewpoint (now called the frost point) is below freezing. When this frost forms the water vapor goes directly to the solid state. If the depositional frost is thick enough, it resembles a light snowfall. I…