Snow may not be white

In this photo (1st one) you may not be able to see real colors on canvas but the snow is now much darker than previous one. Snow on branches are fairly dark gray. But they still look like snow. Now I'm getting some feeling how I could finish this piece.
Also I started "Valley Creek". 20"x26". From the same trip to Stanley, ID, back in Jan. With this piece, I started with much darker under-painting to avoid the same mistake. Even though the creek was very dark, the rest was covered by snow. It was mid-afternoon. Sun was behind me.