gf gets hoarfrost in Winnipeg just about every morning. It melts by about 10am. It was explained to me as a 'fog' frozen on the trees. Very excellent effect on a larger base... see below
>>1478 Without even looking at that, I was going to say whore frost was a hooker standing on a street corner in the dead of winter! :D
Turns out, that's what it is! XD