[jim5cents]

Snow has to do with the temperature in the atmosphere. If it is cold enough, water vapor will freeze while still in the cloud, making snow. If the vapor begins to fall, then freezes, you get sleet (which really sucks) Vapor that falls, then freezes when hitting the ground is called freezing rain and makes the biggest mess because everything ends up covered in ice.

@JG, or it is simple sensationalism. One minute, the planet is cooking because of global warming, next minute we are going to be turned into a giant snowball within 3 weeks. People just trying to sell papers and ad space.