Both snow and ash are flakes - one is a new beginning and the other an ending, they are the Alpha and Omega. Ashes indicate the end of something, and at the same time a beginning of something new. God created man from the dust, and to that, he must return. But those who are cremated and not buried, well, their souls never get a chance to return to their eternal realm -those souls find Limbo as their new home.
Tom works to find peace and redemption...