What is a snow squall?

You may have gotten one of those loud mobile alerts telling you about something called a "snow squall." So what the heck is it and why is it so dangerous? Glad you asked.

Storm could bring record snow to areas of Rocky Mountains

A massive storm is expected to bring record snow and cold unusually early to parts of the Rocky Mountains, where residents were warned to brace for widespread power outages, crop damage and treacherous roadways, meteorologists said Friday.