I recently wrote a detailed breakdown/walkthrough of my Snow Substance for 80 Level, in which I cover the whole creation process. You can read the full article here:
https://80.lv/articles/how-to-make-a-snow-material-in-substance-designer/

Just wanted to say thanks again to Joshua Lynch and Tristan Meere for their tutorials :)

If you have any questions, please don't hesitate to get in touch :)

Thanks