How does snow occur?

Answer

When water reaches a temperature of zero degrees Celsius it will freeze. This is also true when you think of rain. When clouds release rain, if the temperature is cold enough, it forms snow.
Q&A Related to "How does snow occur?"
Heat of sun vaporizes water in sea, lakes & rivers. Vapor of water combine to make clouds. Clouds travel with wind. When they get less temperature, they give rain.
http://www.ask.com/web-answers/Science/Nature/how_...
Strokes most often occur in the elderly, people with high blood pressure, obesity and diabetes. Smoking and alcohol use also increase the risk for strokes. Diets high in cholesterol
http://www.ehow.com/how-does_4602008_a-stroke-occu...
SnowDrifts occur when a big gust of snow topples on top off another object and make a big mound of snow. They relate to sand dunes.
http://wiki.answers.com/Q/What+causes+snow+drifts
Evaporation, gradual change of state from liquid to gas
http://www.chacha.com/question/if-it's-cold-enough...
1 Additional Answer
Precipitation is created in cold air. That cold air turns the rain or precipitation into snow. Gravity then pulls it to the earth as snow.
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