How does sleet form?

Answer

Sleet forms when snows travels through a layer of warm air, melting into raindrops, before re-freezing into tiny ice pellets upon hitting a colder layer of air.

Sleet can only form under very specific weather conditions, which is why it is not as common as other forms of precipitation. It usually occurs during the winter when the proper conditions are most common. Sleet is different than freezing rain. Freezing rain also falls through a layer of cold air towards the ground. However, it freezes upon contact with the object and not in the air. Freezing rain lands as rain, but sleet lands as ice. Sleet is also different than hail. Similarly to sleet, hail is made of ice. Hail, however, freezes while in the clouds. Sleet freezes while it falls.

Additionally, hail freezes in an outward direction, but sleet freezes in an inward direction. Sleet is most common in the eastern United States and Canada, where warm air from the Gulf of Mexico flows north and can create the warm layer of air needed to form sleet. Unlike other forms of precipitation, sleet is very light and does not collect easily. Because of this, sleet cannot harm crops or vehicles.

Q&A Related to "How does sleet form?"
Sleet is rain drops that turn into ice when falling and going through a colder layer of air usually near the surface.
http://wiki.answers.com/Q/How_does_sleet_form
In advance of a warm front in the wintertime, If the cold layer is very dry, sleet will form due
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Quartz is formed in one of two ways. It can freeze out of igneous rocks, or if silica is dissolved in hot water and very slowly will crystallize in the gaps of rocks or small fissures
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Sleet, also known as ice pellets (IP) form when snow falls through a warm layer after leaving the cloud, melts, then passes through a significant freezing layer before reaching the
http://answers.yahoo.com/question/index?qid=200812...
1 Additional Answer
Ask.com Answer for: How Does Sleet Form
Sleet may refer to a mixture of rain and snow, which is formed when snow melts as it reaches the ground. It may also refer to ice pellets. These are formed when ice melts and then refreezes before it reaches the ground.
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When your in weather and it is raining and snowing at the same time but is not below freezing then sleet can form. You want to be careful driving in sleet it ...
Sleet frequently occurs when freezing rain mixes with snow. It forms in a narrow band, usually sandwiched between an area of snow and an area of rain. Sleet is ...
Sleet is formed when raindrops pass through very cold layers in the atmosphere which causes them to freeze. It can also be formed when snow passes through warmer ...
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