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