Albert Barnes Commentary Psalms 147:16

"He giveth snow like wool; He scattereth the hoar-frost like ashes." — Psalms 147:16 (ASV)

He gives snow like wool - He covers the earth with snow, so that it seems to have a clothing of wool. Compare the notes at (Job 37:6): For he saith to the snow, Be thou on the earth.

He scatters the hoarfrost like ashes - As if ashes were strewed over the earth; or, as easily as one strews ashes.