A barely visible crystalline form of ice that has the shape of needles, columns or plates. Ice crystals are so small that they seem to be suspended in air. Ice crystals occur at very low temperatures (around zero degrees F and colder) in a stable atmosphere.
Tweet Vote on HN Some severe storms hit St Clair during the afternoon with hail, very heavy rain and some […]
Tweet Vote on HN Insane Supercell Structure Dumas, Texas May 18 2010 Impressive Supercell in the Texas Panhandle near Dumas […]