Should've known better than to try to fly on a snowy humid 30F day.  None of my parachutes were opening today even with powdered chutes.  This one launched up fine; however delay was very late and ejection at about 50'AGL.  Chute didn't open (was still formed just the same as I had folded even though shroud lines were unwinded); however no damage.  Nose did spin for about the last 30' it had left.