Board Thread:Episode Discussion/@comment-4010415-20170717151617/@comment-26397825-20170719011606

I had a thought on the type of dust Winter might have - just the one, steam, but she used it creatively. Swirling it around would create a blizzard by picking up the snow in the area, and the 'snow' waves could have simply been steam waves.

Or she might have just had wind dust in the sword and used it then, but switched it out for steam dust at some point before she fought Qrow.