Winter storms can range from a moderate snow over a few hours to a blizzard with blinding, wind-driven snow that lasts for several days.
Many winter storms are accompanied by dangerously low temperatures and sometimes by strong winds, icing, sleet and freezing rain.

Ice storms are caused by freezing rain. The raindrops move into a thin layer of below-freezing air right near the surface of the earth, allowing them to freeze on contact to the ground, trees, cars and other objects.

Seasonal dangers, including snow and ice on roads, and reduced visibility from winter precipitation, make it important for drivers to prepare and focus to prevent accidents.