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1
Snow rollers in Northern Michigan
Snow rollers in Northern Michigan
::2013/12/28::
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2
Winter Fun with Swendson Snow Roller
Winter Fun with Swendson Snow Roller
::2012/12/01::
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Snow rollers.  Rare January 27, 2014
Snow rollers. Rare January 27, 2014
::2014/01/27::
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Snow Roller
Snow Roller
::2007/12/14::
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5
Patagonia Black Hole Snow Roller 190CM
Patagonia Black Hole Snow Roller 190CM
::2013/08/26::
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Patagonia Black Hole Snow Roller 167CM
Patagonia Black Hole Snow Roller 167CM
::2013/08/26::
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Miniature Horse Snow Roller
Miniature Horse Snow Roller
::2014/01/03::
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8
Snow Roller
Snow Roller
::2014/01/29::
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(VF) Patagonia Black Hole Snow Roller 167CM - Version Française
(VF) Patagonia Black Hole Snow Roller 167CM - Version Française
::2014/02/27::
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10
(VF) Patagonia Black Hole Snow Roller 190CM - Version Française
(VF) Patagonia Black Hole Snow Roller 190CM - Version Française
::2014/02/27::
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11
Snow roller Phenomenon During Polar Vortex
Snow roller Phenomenon During Polar Vortex
::2014/01/27::
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12
snow roller being pulled by horses
snow roller being pulled by horses
::2014/02/24::
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13
Snow Roller Reactions
Snow Roller Reactions
::2014/01/28::
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14
Snow Roller
Snow Roller
::2011/04/17::
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15
Snow Rollers - snowballs forming by themselves in northern Michigan
Snow Rollers - snowballs forming by themselves in northern Michigan
::2013/12/28::
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16
Neopets- The Worst Snow Roller Player In The WORLD (LITERALLY!)
Neopets- The Worst Snow Roller Player In The WORLD (LITERALLY!)
::2013/08/11::
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17
Snow Roller Forming
Snow Roller Forming
::2014/02/18::
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18
Snow Roller 8k+
Snow Roller 8k+
::2010/05/11::
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19
deck rider chute skate ski snow roller
deck rider chute skate ski snow roller
::2007/05/18::
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20
Ally G Daredevil Snow Roller
Ally G Daredevil Snow Roller
::2010/01/02::
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21
compil skate snow roller lav
compil skate snow roller lav
::2006/06/07::
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22
Silversoft trying to play Snow Roller on www.neopets.com
Silversoft trying to play Snow Roller on www.neopets.com
::2012/02/19::
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23
Event : Snow Roller and Boss NooNoo
Event : Snow Roller and Boss NooNoo
::2007/12/31::
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Snow Roller
Snow Roller
::2008/04/28::
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Nordic Ski Trail Grooming with Snow Roller
Nordic Ski Trail Grooming with Snow Roller
::2012/03/08::
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26
Snow Roller Balls in Red Pine.mov
Snow Roller Balls in Red Pine.mov
::2010/12/13::
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27
Snow Roller, Adirondacks
Snow Roller, Adirondacks
::2010/01/08::
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28
Snow Roller!!
Snow Roller!!
::2008/12/15::
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29
Snow roller
Snow roller
::2014/01/30::
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30
Let
Let's Play Sonic The Hedghog 4 Episode II Part 2: Snow, Roller Coasters, and Rockets!
::2012/06/12::
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31
Snow Roller
Snow Roller
::2007/02/15::
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32
Snow Roller
Snow Roller
::2013/03/04::
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Snow roller
Snow roller
::2012/11/09::
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34
skate snow roller
skate snow roller
::2008/01/23::
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35
Figure skating off ice.Roller-Snow white (фигурное катание на роликах)
Figure skating off ice.Roller-Snow white (фигурное катание на роликах)
::2011/01/15::
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36
Snow Rollers
Snow Rollers
::2014/01/29::
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37
Sällskapsresan 2 - Snowroller
Sällskapsresan 2 - Snowroller
::2008/03/21::
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38
Nuked Radio #89 Early2it: Sea Foam, Snow Rollers, and Geological Uptick EXPLAINED
Nuked Radio #89 Early2it: Sea Foam, Snow Rollers, and Geological Uptick EXPLAINED
::2013/02/01::
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39
Robin Maurer Rex RS 500 roller driving snow germany winter 2012 drifting
Robin Maurer Rex RS 500 roller driving snow germany winter 2012 drifting
::2012/02/14::
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40
Roller Snow Compactor
Roller Snow Compactor
::2007/11/30::
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41
Quarter Guy on Roller Blades in the Snow
Quarter Guy on Roller Blades in the Snow
::2013/01/27::
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42
High Roller Snow Action
High Roller Snow Action
::2011/01/19::
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43
How to Play Roller Derby 2011:  Stops
How to Play Roller Derby 2011: Stops
::2011/02/01::
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44
Foam Roller Snow Angel
Foam Roller Snow Angel
::2011/07/06::
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45
Pound Mates Season 1 Episode 5-Snow Day/Roller Rink
Pound Mates Season 1 Episode 5-Snow Day/Roller Rink
::2014/06/26::
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46
TNK4 Update 1: Snow Mayhem + Snippets Of The HBX Roller Unboxing And Review- Part 2
TNK4 Update 1: Snow Mayhem + Snippets Of The HBX Roller Unboxing And Review- Part 2
::2013/01/20::
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47
A review on ag dolls roller skates and the snow flurry outf
A review on ag dolls roller skates and the snow flurry outf
::2013/04/15::
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48
Seven Dwarfs Mine Train Roller Coaster REAL POV Full Ride Walt Disney World Magic Kingdom
Seven Dwarfs Mine Train Roller Coaster REAL POV Full Ride Walt Disney World Magic Kingdom
::2014/05/01::
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49
Losi High Roller 1/10 in snow
Losi High Roller 1/10 in snow
::2011/01/01::
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50
Roller Skiing - The 1950s Sports Craze!
Roller Skiing - The 1950s Sports Craze!
::2012/02/28::
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From Wikipedia, the free encyclopedia
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A snow roller in Cincinnati, Ohio, USA.

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.

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