Ice Pellets
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| - | [[ | + | [[Image:Ice pellets commonly occur with other crystal forms near the freezing point18.jpg|'''[[Ice Pellets]]''' is '''[[precipitation]]''' in the form of transparent or translucent pellets of '''[[ice]]''', which are round or irregular in shape. They have a diameter of 0.2 inches (5 mm) or less. They are classified into two types: hard grains of ice consisting of [[frozen rain]] drops or largely melted and refrozen '''[[snowflakes]]'''; pellets of '''[[snow]]''' encased in a thin layer of '''[[ice]]''' which have formed from the freezing of droplets intercepted by pellets or '''[[water]]''' resulting from the partial melting of pellets.|thumb|300px]] |
| - | [[ | + | '''[[Ice Pellets]]''' is '''[[precipitation]]''' in the form of transparent or translucent pellets of '''[[ice]]''', which are round or irregular in shape. They have a diameter of 0.2 inches (5 mm) or less. |
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| + | They are classified into two types: hard grains of ice consisting of [[frozen rain]] drops or largely melted and refrozen '''[[snowflakes]]'''; pellets of '''[[snow]]''' encased in a thin layer of '''[[ice]]''' which have formed from the freezing of droplets intercepted by pellets or '''[[water]]''' resulting from the partial melting of pellets. | ||
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| + | Ice pellets form when a layer of above-freezing air is located between 1500 meters (approximately 5,000 feet) and 3000 meters (approximately 10,000 feet) above the ground, with sub-freezing air both above and below it. | ||
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| + | This causes the partial or complete melting of any snowflakes falling through the warm layer. As they fall back into the sub-freezing layer closer to the surface, they re-freeze into ice pellets. However, if the sub-freezing layer beneath the warm layer is too small, the precipitation will not have time to re-freeze, and freezing rain will be the result at the surface. | ||
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| + | == '''Also see''' == | ||
| + | |||
| + | *'''[[Ice]]''' | ||
| + | *'''[[Snowflake Gallery]]''' | ||
| + | *'''[[Rain]]''' | ||
| + | *'''[[Snow]]''' | ||
| + | *'''[[Sleet]]''' | ||
| + | *'''[[Temperature]]''' | ||
| + | |||
| + | == '''Reference''' == | ||
| + | * Wikipedia ''Ice pellets'' [http://en.wikipedia.org/wiki/Ice_pellets] | ||
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Current revision
Ice Pellets is precipitation in the form of transparent or translucent pellets of ice, which are round or irregular in shape. They have a diameter of 0.2 inches (5 mm) or less.
They are classified into two types: hard grains of ice consisting of frozen rain drops or largely melted and refrozen snowflakes; pellets of snow encased in a thin layer of ice which have formed from the freezing of droplets intercepted by pellets or water resulting from the partial melting of pellets.
Ice pellets form when a layer of above-freezing air is located between 1500 meters (approximately 5,000 feet) and 3000 meters (approximately 10,000 feet) above the ground, with sub-freezing air both above and below it.
This causes the partial or complete melting of any snowflakes falling through the warm layer. As they fall back into the sub-freezing layer closer to the surface, they re-freeze into ice pellets. However, if the sub-freezing layer beneath the warm layer is too small, the precipitation will not have time to re-freeze, and freezing rain will be the result at the surface.
[edit] Also see
[edit] Reference
- Wikipedia Ice pellets [1]
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