Snow pertains to frozen crystalline water throughout its life cycle, starting when it precipitates from clouds and accumulates on surfaces, then metamorphoses in place, and ultimately melts, slides or sublimates away. Snowstorms organize and develop by feeding on sources of atmospheric moisture and cold air. Snowflakes nucleate around particles in the atmosphere by attracting supercooled water droplets, which freeze in hexagonal-shaped crystals. Snowflakes take on a variety of shapes, basic among these are platelets, needles, columns and rime. As snow accumulates into a snowpack, it may blow into drifts. Over time, accumulated snow metamorphoses, by sintering, sublimation and freeze-thaw. Where the climate is cold enough for year-to-year accumulation, a glacier may form. Otherwise, snow typically melts, seasonally, and causes runoff into streams and rivers and recharging groundwater.
Major snow-prone areas include the polar regions, the upper half of the Northern Hemisphere and mountainous regions worldwide with sufficient moisture and cold temperatures. In the Southern Hemisphere, snow is confined primarily to mountainous areas, apart from Antarctica.
Scientists study snow at a wide variety of scales that include the physics of chemical bonds and clouds; the distribution, accumulation, metamorphosis, and ablation of snowpacks; and the contribution of snowmelt to river hydraulics and ground hydrology. In doing so, they employ a variety of instruments to observe and measure the phenomena studied. Their findings contribute to knowledge applied by engineers, who adapt vehicles and structures to snow, by agronomists, who address the availability of snowmelt to agriculture, and those, who design equipment for sporting activities on snow. Scientists develop and others employ snow classification systems that describe its physical properties at scales ranging from the individual crystal to the aggregated snowpack. A sub-specialty is avalanches, which are of concern to engineers and outdoors sports people, alike.
Snow affects such human activities as transportation: creating the need for keeping roadways, wings, and windows clear; agriculture: providing water to crops and safeguarding livestock, and such sports as skiing, snowboarding, and snowmachine travel. Snow affects ecosystems, as well, by providing an insulating layer during winter under which plants and animals are able to survive the cold.

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  1. Joe13

    Ape caves snow free yet?

    Thinking about going up above the Ape Caves this weekend for some hiking. Has anybody been up that way recently and is the snow receding? I would like to try and find out so I don't spend the time to drive up there and then have to find another spot to go. I have gear and not worried about...
  2. conditor22

    Anyone know where Snow peak gravel pit is south of Stayton ?

    Does anyone know where Snow peak gravel pit is south of Stayton East of Scio? I heard you exit off 226 at the small town of Jordan I heard about this shooting area but haven't been able to find it. Does anyone have directions to it? Thanks.
  3. User 1234

    HOA threatens woman for shape of snow shadow

    HOA threatens resident with fine after car leaves unusual shape in snow: report The resident and the management company, or board member, who sent the threat must be the dumbest people for miles around.
  4. slimmer13

    Local teenage entrepreneur

    Smart kid Coeur d'Alene teenager makes $35,000 plowing Seattle streets
  5. 2Wheels4Ever

    A Little Snow Adventure.

    I just came back from a snow camping trip I did with my father. Camping in the snow has been on my want to try list, so I convinced my dad to brave the elements and do an overnight trip in the Mt. Washington wilderness. The plan was to be dropped off on Saturday morning, ride 20 miles in on...
  6. L

    Joke to go along with the recent snow (Dairy of a Southerner)

    Diary of a Southerner December 8: 6:00 PM It started to snow. The first snow of the season and the first we’ve seen in years. The wife and I took our cocktails and sat for hours by the window watching the huge soft flakes drift down from heaven. It looked like a Grandma Moses Print. So romantic...
  7. arakboss

    How to drive on snow and ice.

    This: How to drive on snow and ice Or this: Hello, Domino's I'll take a large pep with extra cheese.
  8. 2506

    Snow Day

    So, looks like we’re going to have to hunker in the bunker. I started polishing my EDC for something to kill the time. Before and after a little bit of elbow grease. :D
  9. CountryGent

    Winter Weather Advisories

    There are a number of alerts all over the state of Oregon today. Just passing along the link. Just passing it along. Stay safe. P.S. @TeacherSmurf is excited about a potential snow day. :s0112:
  10. prkrgrp


    got few last couple weeks. Hunting coyotes all day
  11. prkrgrp


    Fresh snow tracks everywhere, couldn't get in front of them until late afternoon this huge male came into the Tye Nichols antler close reed distress shot hIm right between the front legs and he still ran 300 yards.
  12. prkrgrp

    Snow Days

    Snow days
  13. C

    Anyone hunt in snow season?

    Anyone here who regularly hunts in the snowy season East of the Cascades? I have a possible gear fabric available locally to me; it is the Pencott Snowdrift camo pattern in 1000D Cordura. Shown below is a smock in that pattern. I see on a google search that there are a couple custom AR...
  14. RicInOR

    DGU  Snow Plow

    This is a convoluted story - read carefully. Sounds like an episode of Fargo. Well it's near Fargo. Woman tried to shoot I-94 trooper in head, passenger claims he’s of ‘sovereign nation,’ court documents say – Twin Cities Woman driving looses control car comes to rest against barrier...
  15. R

    The South’s answer to your driving on snow

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