From the local paper...never heard that term before...
http://www.inforum.com/dynamic/full/...lone-frost.jpg
The statue of 19th-century Norwegian writer and poet Henrik Wergeland stands near a grove of frost-covered trees Tuesday in Fargo?s Island Park. High humidity, falling temperatures and calm winds have allowed the hoarfrost to accumulate to unusual levels. Hoarfrost gets the first part of its name from hoar, a gray-white color often associated with things that age.
Wonner if I'm gonna turn a gray-white soon...