Have you ever heard of Hoar frost? I have not.

According to Britannia Hoar frost is a:

deposit of ice crystals on objects exposed to the free air, such as grass blades, tree branches, or leaves. It is formed by direct condensation of water vapour to ice at temperatures below freezing and occurs when air is brought to its frost point by cooling.

NWS in Gaylord Michigan have us some beautiful examples of Hoar frost in Gaylord Michigan last week. On their Facebook page they explained that to create this frost you need calm or very light winds and clear skies.  NWS Gaylord wrote on Facebook last week that

We woke up to a nice covering of Hoar frost for a winter wonderland this morning. To get this frost you need calm or very light winds and clear skies…This allows the ground to drastically cool as heat radiates away from the earth’s surface. If you have enough moisture in the air next to the very cold ground, the gaseous water vapor will turn directly to solid ice crystals through the process of deposition. It definitely creates beautiful images!

Then NWS Gaylord gave us these beautiful pictures of Mother Nature:

Hoar Frost Pic 4 courtesy of NWS Gaylord
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Hoar Frost Pic 2 courtesy of NWS Gaylord
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Hoar Frost Pic 3 courtesy of NWS Gaylord
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Courtesy of NWS Gaylord
Courtesy of NWS Gaylord
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