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- Snow_roller abstract "A snow roller is a rare meteorological phenomenon in which large snowballs are formed naturally as chunks of snow are blown along the ground by wind, picking up material along the way, in much the same way that the large snowballs used in snowmen are made.Unlike snowballs made by people, snow rollers are typically cylindrical in shape, and are often hollow since the inner layers, which are the first layers to form, are weak and thin compared to the outer layers and can easily be blown away, leaving what looks like a doughnut or Swiss roll. Snow rollers have been seen to grow as large as two feet in diameter.The following conditions are needed for snow rollers to form: There must be a relatively thin surface layer of wet, loose snow, with a temperature near the melting point of ice Under this thin layer of wet snow there must be a substrate to which the thin surface layer of wet snow will not stick, such as ice or powder snow The wind must be strong enough to move the snow rollers, but not strong enough to blow them apart. Alternatively, gravity can move the snow rollers as when a snowball, such as those that will fall from a tree or cliff, lands on a steep hill and begins to roll down the hill.Because of this last condition, snow rollers are more common in hilly areas. However, the precise nature of the conditions required makes them a very rare phenomenon.".
- Snow_roller thumbnail Snowroller.jpg?width=300.
- Snow_roller wikiPageExternalLink 2003622603_donut17m.html.
- Snow_roller wikiPageExternalLink snow-pictures-.html.
- Snow_roller wikiPageExternalLink roller.htm.
- Snow_roller wikiPageExternalLink display_cmsstory.php?wfo=ilx&storyid=100515&source=0.
- Snow_roller wikiPageExternalLink tem_snowrollers13.html.
- Snow_roller wikiPageExternalLink ?id=51854.
- Snow_roller wikiPageExternalLink ?nid=396&sid=135819&pid=40.
- Snow_roller wikiPageExternalLink story.php?storyId=8993287.
- Snow_roller wikiPageExternalLink snowroller1.asp.
- Snow_roller wikiPageExternalLink snow-donuts-a-natural-weather-phenomena.html.
- Snow_roller wikiPageExternalLink Snow-stories-rare-self-rolling-snow-balls-found-in-UK.html.
- Snow_roller wikiPageID "1375425".
- Snow_roller wikiPageRevisionID "596402694".
- Snow_roller hasPhotoCollection Snow_roller.
- Snow_roller subject Category:Natural_history_of_Vermont.
- Snow_roller subject Category:Snow_or_ice_weather_phenomena.
- Snow_roller type Phenomenon100034213.
- Snow_roller type PhysicalEntity100001930.
- Snow_roller type Process100029677.
- Snow_roller type SnowOrIceWeatherPhenomena.
- Snow_roller comment "A snow roller is a rare meteorological phenomenon in which large snowballs are formed naturally as chunks of snow are blown along the ground by wind, picking up material along the way, in much the same way that the large snowballs used in snowmen are made.Unlike snowballs made by people, snow rollers are typically cylindrical in shape, and are often hollow since the inner layers, which are the first layers to form, are weak and thin compared to the outer layers and can easily be blown away, leaving what looks like a doughnut or Swiss roll. ".
- Snow_roller label "Rollo de nieve".
- Snow_roller label "Rouleau de neige".
- Snow_roller label "Schneering".
- Snow_roller label "Sneeuwroller".
- Snow_roller label "Snow roller".
- Snow_roller label "雪まくり".
- Snow_roller sameAs Schneering.
- Snow_roller sameAs Rollo_de_nieve.
- Snow_roller sameAs Rouleau_de_neige.
- Snow_roller sameAs 雪まくり.
- Snow_roller sameAs Sneeuwroller.
- Snow_roller sameAs m.04xrzz.
- Snow_roller sameAs Q1849579.
- Snow_roller sameAs Q1849579.
- Snow_roller sameAs Snow_roller.
- Snow_roller wasDerivedFrom Snow_roller?oldid=596402694.
- Snow_roller depiction Snowroller.jpg.
- Snow_roller isPrimaryTopicOf Snow_roller.
