Where do my snow angels go?

It’s snowing, you guys—yaaaaayyyyy!!!!  I’ve gone out in the backyard a bunch of times already, but each time I see my snow angels have disappeared.  I mean, they’re just gone.  So I keep having to make more.  I’ve been out about 6 times in the past 6 hours & they keep disappearing.  I need to stay on top of this.  I hope no one plans on going to sleep anytime soon 'cause I'm not through.