Hoar frost

Forms from the slow deposition of water vapour directly to ice on a surface. By accumulating slowly, hoar can form interlocking crystals that grow out from the surface. It generally exhibits a feather, fern, or flower pattern growing from the initial seed. Hoar forms only when winds are light, which is often the situation during clear, cold nights; thus it is the most common type of frost to those dwelling in non-mountainous areas. When we speak of frost, we are usually referring to hoar frost rather than rime frost.

About Cameron Speirs

Born and brought up in the Scottish Highlands, Cameron, has been interested in outdoor pursuits since he was a wee lad. Over the last few decades he has climbed extensively in the Italian Dolomites as well as summiting the Matterhorn and several other 4000m alpine peaks. Closer to home he has spent many wonderful weekends mountaineering and biking in Snowdonia, Cairngorms, Glen Coe, Skye and Lochaber.
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