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en.wikipedia.org/wiki/Snow

Snow refers to forms of ice crystals that precipitate from the atmosphere (usually from clouds) ... Otherwise, snow typically melts seasonally, causing runoff into streams and rivers and recharging groundwater. Major snow-prone areas include  ...

www.weatherquestions.com/What_causes_snow.htm

Nov 28, 2010 ... Brief, simplified description of the causes of snow. ... available from the warm air mass the rising air originates from, causes clouds to form.

www.metoffice.gov.uk/learning/snow/how-is-snow-formed

Nov 19, 2014 ... Find out how snow is formed, what it is made of and how cold it needs to be to snow.

nsidc.org/cryosphere/snow/science/formation.html

Once snow crystals form in the atmosphere, they grow by absorbing surrounding water droplets. The snowflakes we end up seeing on the ground are an ...

www.theweatherprediction.com/basic_weather_questions/snow.html

Snow forms in clouds that are below freezing. Much of the rain that makes it to the surface started out as snow high aloft and then melted before reaching the ...

nsidc.org/cryosphere/snow/science/types.html

For instance, a fresh snowfall may be loose and powdery, but snow that has been on the ground throughout the winter may have dense, crusted layers caused ...

www.edinformatics.com/math_science/what_causes_rain.htm

Let's first start with some definitions that will help you understand precipitation and rain. Evaporation - is when a liquid becomes a gas. For example, a water left  ...

passporttoknowledge.com/storm/why/precipitation.htm

Precipitation: What makes clouds, rain, snow, hail and sleet ... The weight of the ice can cause tree limbs to fall across power lines, or sometimes just drag down ...

www.reference.com/science/causes-snow-515bc87e194579e5

Snow occurs when water droplets in clouds freeze, and these droplets then act as a nucleus onto which molecules of water vapor adhere, forming larger ice ...