Ice dams can form when snow collects on the roof.

The greasy snow had collected on the iron runners of the fire escape, and he had to make his way carefully.

Even in the rubble field the air was noticeably warm, and no snow had collected on the dome itself.

The day was warm, and snow collected, heavy, on my boots.

Else stole away, found a place where snow had collected.

The snow collected in the thin grey hairs of her head, but she still did not notice it was snowing.

Not much snow had collected on the ground yet, but it would as the day went on.

He would turn it over, letting all the snow collect on the top, then quickly invert it.

The snow would presumably collect over the landscape through a period of deep cold, then would melt as the climate warmed.

The snow had not collected on our trap.