Graupel

Sleet forms when snow falls through a layer of warm air, causing it to melt, and then back into a layer of sub-freezing air that causes it to re-freeze into a pellet of ice. (credit: CBS)

Weather Blog: 1° Of Separation

Well, that was unpleasant. This morning’s mix of wintery precipitation prompted a round of “what is this stuff falling from the sky?” on Twitter and Facebook … and it’s a good question.

03/17/2014

Follow

Get every new post delivered to your Inbox.

Join 2,587 other followers