Editing Snowball (section)

==Natural snowballs==
{{Main| Snow roller}}
Under certain conditions, [[Snow roller|natural snowball]]s may form as a result of wind, without human intervention. These conditions are:<ref>[https://www.telegraph.co.uk/topics/weather/6950788/Snow-stories-rare-self-rolling-snow-balls-found-in-UK.html Rare self-rolling giant snow balls found in UK] {{webarchive|url=https://web.archive.org/web/20100112014558/http://www.telegraph.co.uk/topics/weather/6950788/Snow-stories-rare-self-rolling-snow-balls-found-in-UK.html |date=2010-01-12 }}, The Telegraph, January 8, 2010</ref>

* The ground must have a top layer of ice. This will prevent the snowball from sticking to the ground.
* That ice must have some wet and loose snow that is near its melting point.
* The wind must be strong enough to push the snowballs, but not too strong.

In Antarctica, small windblown frost balls form through a different process that relies on [[electrostatic attraction]];<ref>
{{Cite journal|author1=J. Nelson  |author2=M. Baker |name-list-style=amp |title = Charging of ice-vapor interfaces|journal = Atmospheric Chemistry and Physics Discussions|year = 2003|volume = 3|pages = 41–73|url = http://www.atmos-chem-phys-discuss.net/3/41/2003/acpd-3-41-2003-print.pdf}}</ref> these wind-rolled frost balls are known as [[yukimarimo]].

Under other rare circumstances, in coastal and river areas, [[wave action]] on ice and snow may create beach snowballs or [[ball ice]].<ref>{{cite news |last1=Emerson |first1=Sarah |title=Thousands of Snowballs on This Siberian Beach Are Straight From a Fairy Tale |url=https://www.vice.com/en/article/thousands-of-snowballs-on-this-siberian-beach-are-straight-from-a-fairy-tale/ |access-date=8 November 2016 |work=Motherboard |publisher=[[Vice Media]] |date=8 November 2016 |url-status=live |archive-url=https://web.archive.org/web/20161109090438/http://motherboard.vice.com/en_ca/read/thousands-of-snowballs-on-this-siberian-beach-are-straight-from-a-fairy-tale |archive-date=9 November 2016}}</ref>
<gallery>
File:Jää on kulmunud pallideks (Looduse veidrused). 05.jpg | Ball ice
File:Yukimarimo_south_pole_dawn_2009.jpg | Yukimarimo
File:Snow roller (30 January 2014) (Newark, Ohio, USA) 53 (46107487244).jpg | Wind-rolled snowball
File:Spongy ice ball Lake Street.jpg | Beach snowball showing signs of [[denivation]]
</gallery>