maybe you just dont fucking know that compacting snow makes it a hard cold object that's gonna take ages to melt?
plus, what? if it is unmeltable, then is it gonna stick forever? why has the deepstate always gotta do such dumb idiot mistakes? "let's make evil laughter FAKE SNOW!" "sir we cannot make it melt, which is the one thing snow is known for doing" "eh who cares we dont have the budget" and then the snow sticks around forever even during summer
It's like 20 degrees Celsius here and there's still some snow in some places because guess what it gets compact and then it doesn't melt easy.