Please explain !!! Had there been long rain, then cold? Night heavy freeze after thawing afternoon...absolutely still night...Curious, I'm the cat about to die!
Thanks for technical explanations, also called "Needles of Ice Growing on Wood".
I will add that the phenomenon is rather seldom and located in some well orientated valleys.
More, those crystals are especially growing on some kind of wood, preferably without bark.
And yes, a lot of rain before a night freeze, but not especially heavy.
More here http://my.ilstu.edu/~jrcarter/ice/wood/
The first time I noticed that phenomenon was in 2005.
But crystals are reallly nice this year