This is one pattern from a set of 7 by MyPicot.com. The pattern set is available on Ravelry. These are BIG snowflakes. The one above measures over 9 inches across so you won't need many to hook your own personal blizzard.
I highly recommend MyPicot as a source for both crochet and knitting stitch patterns and motifs. Some are for sale, but many are free. I especially love the gorgeous flowers and butterflies. There are also several tutorials and instructions on how to read crochet stitch diagrams. This web site is well worth having in your virtual crochet library.
