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This article was the subject of a Wiki Education Foundation-supported course assignment, between 5 October 2020 and 20 November 2020. Further details are available on the course page. Student editor(s): J Yip. Peer reviewers: IJThomas.
The text of the original article, as of 27 November 2016, is in a commented out area below the developmental material. User:HopsonRoad 00:16, 28 November 2016 (UTC)[reply]
Now the text of the original article is visible and the developmental text is commented out. User:HopsonRoad 15:41, 2 December 2016 (UTC)[reply]
I think this topic deserves a treatment of some of these topics. I'm pretty sure the snow has cropped up in human experience, and I think that deserves a bit of coverage along with the extensive scientific overview. Corbmobile
Much of the earths fresh water is held by gigantic glacier|glacier in the north and south poles, formed by falling snow over milennia.
There's a different between glaciers, ice fields, and polar caps. Are we sure that caps are formed from falling snow? I was under the impression that Antarctica got almost no precipitation at all, and the ice sheet expanded and contracted by simple melting and freezing.
The ice caps are formed from falling snow. Almost no precipitation is not equal to no precipitation at all; if it never gets above freezing, it will eventually accumulate no matter how little falls. -- Paul Drye
Extremely small snow/ice particles that fall lightly, almost like drizzle that is frozen. This kind of snow is very common in Michigan.
Is this real? Particularly the term, not the frozen drizzle form of precipitation. Maybe I'm just skeptical when I see "izzle" on the end of a word?
"Sizzle" isn't a real meteorological term. It's basically a slang term that's sometimes used by weather forecasters though...mostly as a joke. Guy1890 (talk) 05:32, 27 November 2016 (UTC)[reply]
Snow is formed from the clouds in the sky that the clouds drop to the ground when it gets very cold and then the clouds create snow and stay on the ground until the sun melts the snow up
In the United States, states and parts of states which are usually covered with snow in a typical winter include the New England states, New York, Pennsylvania, New Jersey, West Virginia, Michigan, Wisconsin, Minnesota, the Dakotas, Montana, Wyoming, western Colorado, Idaho, and high-altitude areas of Washington, Oregon, and Utah, although the dry area just east of the Rockies in eastern Montana and Wyoming and the western Dakotas is quite often snowless. Neighboring states and high-altitude areas in other states also are quite often covered with snow, but in states farther south or at lower elevation, it may snow for a day but usually melts within a week. Canada is usually completely covered, except for the more temperate area around Vancouver, British Columbia, and occasionally southern Alberta. Alaska is likewise covered except for some coastal areas and islands.
This was removed, because it is not strictly related to "snow". An encyclopedic article should contain important and or interesting facts. The "word records" are quite o.k. but these here are kind of badly selected. Too much if the intension is just to give an example. Globaly not well selected if intended to give an overview for snow occurrence. And to mention all places of the world would confuse the reader more than informing.
I changed switched the units around for these two mountains as per wikipedias policy. The coop stations that recorded the snow did so in inch increments and the meter is a conversion and thus parenthesized as supplemental
By late spring, snow densities often exceed 50% of water[edit]
50%???? that looks too much,and this is not said in the link
The density (which is a measure of the amount of liquid water in a snowpack) of an existing snowpack changes over time after it's fallen to the ground. This mostly takes place due to the melting & refreezing process over time and/or sublimation or compaction of the snow. Once a snowpack becomes "ripe", it will tend to melt off faster than snow that is a lot "drier". Guy1890 (talk) 05:37, 27 November 2016 (UTC)[reply]
I'm surprised to see a picture of snowflakes. I didn't think you could actually photograph a snowflake without a microscope. — Preceding unsigned comment added by Pslamba (talk • contribs) 03:13, 27 December 2010 (UTC)[reply]
There is a lot of duplicate material in the article which could be eliminated. Caeruleancentaur (talk) 03:29, 19 December 2009 (UTC)[reply]
You are an editor, be bold and fix it. It is hard for others to know exactly what you are talking about to try to fix the problems you have identified. ~~ GB fan ~~talk 03:39, 19 December 2009 (UTC)[reply]
There is a phrase (in UK English) that "it's too cold to snow" which does not appear to make any sense because otherwise how is it that the poles are covered in snow? To give the benefit of the doubt, I expect the phrase relates to noticeable large conglomerations of snowflakes and not to small ice crystals. If that is the case, then could it be "too cold to snow (in an obvious way)"? —Preceding unsigned comment added by 91.111.114.1 (talk) 14:53, 8 January 2010 (UTC)[reply]
Period of extreme cold are usually associated with very dry atmospheric conditions. Since one can't form precipitation without existing moisture, periods of extreme cold are usually snow-free. It actually is possible to get some very light snow flurries from a virtually clear sky on a relatively cold day (especially in the mountains) though...virtually because that kind of snow actually falls from a moisture layer that's barely visible to the naked eye but can be viewed by a ceilometer. Snow that falls when the surface temperature is generally around the freezing mark has more moisture content in it than snow that falls during periods of colder surface temperatures. Guy1890 (talk) 05:43, 27 November 2016 (UTC)[reply]
I added this template because the intro could be trimmed. I am bolding the bits below I think should be kept, my opinion is that the rest verge into detail:
Snow is a type of precipitation within the Earth's atmosphere in the form of crystalline water ice, consisting of a multitude of snowflakes that fall from clouds. Since snow is composed of small ice particles, it is a granular material. It has an open and therefore soft structure, unless packed by external pressure. Snowflakes come in a variety of sizes and shapes. Types which fall in the form of a ball due to melting and refreezing, rather than a flake, are known as graupel, with ice pellets and snow grains as examples of graupel. Snowfall amount and its related liquid equivalent precipitation amount are determined using a variety of different rain gauges.
The process of precipitating snow is called snowfall. Snowfall tends to form within regions of upward motion of air around a type of low-pressure system known as an extratropical cyclone. Snow can fall poleward of their associated warm fronts and within their comma head precipitation patterns, which is called such due to its comma-like shape of the cloud and precipitation pattern around the poleward and west sides of extratropical cyclones. Where relatively warm water bodies are present, for example due to water evaporation from lakes, lake-effect snowfall becomes a concern downwind of the warm lakes within the cold cyclonic flow around the backside of extratropical cyclones. Lake-effect snowfall can be locally heavy. Thundersnow is possible within a cyclone's comma head and within lake effect precipitation bands. In mountainous areas, heavy snow is possible where upslope flow is maximized within windward sides of the terrain at elevation, if the atmosphere is cold enough.
Once on the ground, snow can be categorized as powdery when fluffy, granular when it begins the cycle of melting and refreezing, and eventually ice once it packs down, after multiple melting and refreezing cycles, into a dense mass called snow pack. When powdery, snow moves with the wind from the location where it originally landed, forming deposits called snowdrifts which may have a depth of several meters. After attaching to hillsides, blown snow can evolve into a snow slab, which is an avalanche hazard on steep slopes. The existence of a snowpack keeps temperatures colder than they would be otherwise, as the whiteness of the snow reflects most sunlight, and the absorbed heat goes into melting the snow rather than increasing its temperature. The water equivalent of snowfall is measured to monitor how much liquid is available to flood rivers from meltwater which will occur during the upcoming spring. Snow cover can protect crops from extreme cold. If snowfall stays on the ground for a series of years uninterrupted, the snowpack develops into a mass of ice called glacier. Fresh snow absorbs sound, lowering ambient noise over a landscape due to the trapped air between snowflakes acting to minimize vibration. These acoustic qualities quickly minimize, and reverse once a layer of freezing rain falls on top of snow cover. Walking across snowfall produces a squeaking sound at low temperatures. For motion pictures, the sound of people walking across snow is duplicated through the use cornstarch, salt, and cat litter.
The term snow storm can describe a heavy snowfall while a blizzard involves snow and wind, obscuring visibility. Snow shower is a term for an intermittent snowfall, while flurry is used for very light, brief snowfalls. Snow can fall more than a meter at a time during a single storm in flat areas, and meters at a time in rugged terrain, such as mountains. When snow falls in significant quantities, travel by foot, car, airplane and other means becomes highly restricted, but other methods of mobility become possible: the use of snowmobiles, snowshoes and skis. When heavy snow occurs early in the fall, significant damage occurs to trees still in leaf. Areas with significant snow each year can store the winter snow within an ice house, which can be used to cool structures during the following summer. A variation on snow has been observed on Venus, though composed of metallic compounds and occurring at a substantially higher temperature.
I just saw something hilarious on The Weather Channel while waiting for a forecast. In a show about Ouray, they said that storms coming from the Pacific dump their water on the coastal ranges then dry out over the desert, so after losing their moisture they dump "dry snow" on Ouray. ;) I think somebody was just pulling my leg, but I should just ask, just in case there's a way to make sense out of a statement like that... Wnt (talk) 19:09, 19 January 2010 (UTC)[reply]
It makes as much sense as dry thunderstorms being devoid of moisture. None. Thegreatdr (talk) 17:30, 7 February 2010 (UTC)[reply]
It was worded oddly. In that link, he's just comparing dense to less dense snowfall. It all has water equivalent. Thegreatdr (talk) 18:16, 7 February 2010 (UTC)[reply]
The section equivalents on other planets clearly needs to cover CO2 precipitation on Mars - for which there is extensive literature including MOLA observations of falling snow in the polar night [1]. Pluto also has an atmosphere that condenses during its long orbit. In both cases, it is the main ingredient of the atmosphere condensing, not an included component. Mars also displays condensation of water ice as frosts. It is not clear if water ice snow(flakes) ever form on Mars. A Phoenix Lander Lidar observation describes "snow" not distinguish between H2O and CO2 [2] -2SickNick (talk) 05:23, 10 February 2010 (UTC)[reply]
The OGG media file in the "Acoustic properties" section is awful. It's labelled as "Snow falling in Scotland" but it consists mostly of the loud sound of an airplane(?) flying overhead and other distracting background noises; there is no sound of snow falling to be heard. So I deleted it. Hopefully someone else can get a suitable recording of the sound of snow falling. — Loadmaster (talk) 20:08, 15 April 2010 (UTC)[reply]
While not ideal, it definitely does have the sound of snow (sounds like static). I have re-added it for now, but it should be replaced if possible.-RunningOnBrains(talk) 06:13, 16 April 2010 (UTC)[reply]
Edit request from 128.178.175.235, 1 December 2010[edit]
{{edit semi-protected}}
In "Snow blindness" section, please change "However, when there is also cloud cover because snow is falling, light" to "However, when there is also cloud cover, light". There does not have to be snow actually falling in order to create the light-reflection effect this sentence describes.
In "Effects on human society" section, please change "This allowed the ice to be used in summer for refrigeration or medical uses, which is one method of conserving electrical usage" to "This allows the snow to be used through the summer for refrigeration and air conditioning, which requires far less electricity than traditional cooling methods." This is more accurate according to the source article.
In "Recreation" section, please change, "snow angels, a popular past-time for children" to "snow angels, a popular pastime for children." "Past-time" is not a word; "pastime" means "recreational activity." Emoreth (talk) 15:36, 12 December 2010 (UTC)[reply]
Changed all, thank you, except for fertilizer - we need reliable source for that information. The link you provided reads as original research - it is unclear whether there is any real effect, and how geographically reproducible that effect is (say, people from Nepal might read this article and think they don't need to buy fertilizer :-) Materialscientist (talk) 23:40, 12 December 2010 (UTC)[reply]
In areas with abundant snowfall, such as Northern Japan, people harvest snow and store it surrounded by insulation in ice houses. This allows the snow to be used through the summer for refrigeration and air conditioning, which requires far less electricity than traditional cooling methods.[81]
This paragraph is misleading at best. Snow harvesting is limited to one project in Funagata, Yamagata Prefecture - as noted in the footnote above. The wording of the article makes it seem like a widespread cultural practice, with individuals harvesting snow for personal use, when in fact it's a single operation maintained by city officials.
Further, Yamagata prefecture is not "Northern Japan", and it certainly isn't in Hokkaido, where the "Northern Japan" hypertext takes the reader. —Preceding unsigned comment added by 60.46.30.76 (talk) 01:18, 13 December 2010 (UTC)[reply]
I have corrected the article per source and your comment. I vaguely recall seeing on TV similar practice in Hokkaido (snow is collected from nearby areas and piled up). This was more for food storage than for snow storage though. In other words, the practice might not be isolated, but we need references for that. Materialscientist (talk) 01:47, 13 December 2010 (UTC)[reply]
Hi, shouldn't the illustration with the description "An animation (satellite images) showing seasonal snow changes." be specified that it's only showing the northern hemisphere in winter? --Jcaraballo (talk) 22:06, 7 January 2011 (UTC)[reply]
When I click the image, I see changes in both hemispheres. Materialscientist (talk) 23:51, 7 January 2011 (UTC)[reply]
This article is completely bereft of information on where snow commonly, rarely or never occurs. I don't even know where to look for this information from the links in this article. This is a huge omission, can someone with more knowledge on the subject fix this?GSTQ (talk) 08:36, 25 January 2011 (UTC)[reply]
I think someone should create an article called snow climatology, which discusses this. Sfoske70 (talk) 15:50, 5 April 2014 (UTC)[reply]
Agree with the former poster. Since it will be fewer than 20 countries where snow are common on a yearly basis, you should list up all of them. To help you going, here's a partial list:
Countries with yearly snow: Norway, Sweden, Finland, Russia, Svalbard(under Norway), Mongolia, Canada, USA, Greenland (under Denmark), Switzerland, Austria, China and Japan.
Countries that don't have yearly snow but bordering snow countries/regions: UK (not even Scotland), Denmark (mainland), South Africa, Australia.
Countries that might have yearly snow, find out: Argentina, Chile, New Zealand, Falkland Islands(UK), North Korea, South Korea, Kasakstan, Estonia, Latvia, Lithuania, Belarus, Ukraine.
A huge number of other countries have snow on a few mountaintops or ski villages (i.e. Kenya and Germany), but as a whole it's not typical for the country.
The article says "Although the ice is clear, scattering of light by the crystal facets and hollows/imperfections mean that the crystals often appear white in color due to diffuse reflection of the whole spectrum of light by the small ice particles.[15]" I disagree, or at least think this should be clarified: While snow is a pretty good diffuse reflector as a bulk material, each snowflake looks white not because of diffuse reflection but because of a combination of specular reflection, refraction, and total internal reflection. In bulk this averages out to diffuse reflection, but it is a leap to say that ice is clear but facets and imperfections make them white due to diffuse reflection. Let's clean that up. —Ben FrantzDale (talk) 13:30, 24 August 2011 (UTC)[reply]
Split, Croatia as "the southern limit of expected snow fall in Europe"[edit]
Since on the Adriatic coasts of Italy (not to speak about the Bulgarian Black sea coasts) snow-capped coasts are pretty common in winter (here snow-cappedVasto at 42'11" N last winter), saying Split (43'30" N) is the "the southern limit of expected snow fall at coast in Europe" is nonsense.--Carnby (talk) 14:53, 5 August 2012 (UTC)[reply]
The video on this article that says underneath it 'Snow falling in Scotland', it's wrong! It's not Scotland, if you click on the video itself the user who uploaded it clearly says it is was filmed in Trinidad. Why would he/she be wrong, when they're the ones that filmed it?? So I am changing 'Scotland' back to 'Trinidad' on this article. — Preceding unsigned comment added by 82.16.15.192 (talk) 12:56, 6 October 2012 (UTC)[reply]
So I read the recreation section, and for some reason, perhaps because I love it, the NFL came to mind. So I added a few lines about the NFL in the snow.Zdawg1029 (talk) 17:06, 29 March 2014 (UTC)[reply]
So in the records section, all of the records are described using centimeters and then inches in parentheses.
Example: The world record for the highest average yearly snowfall is 1,764 cm (694 in).
Because we are describing such large amount of snow here, and most people cannot divide large numbers by 12 in their head, I propose we change where it says the total inches to total feet with inches remaining.
Example: The world record for the highest average yearly snowfall is 1,764 cm (57 ft 10 in).
I mean to me it puts it a little more into perspective. When I first read the section I had to pull my phone out to do the math myself. It doesn't make any sense to leave it like that when most people would want to know how many feet it is, not just the total number of inches.Zdawg1029 (talk) 02:31, 4 April 2014 (UTC)[reply]
All the metric measurements would be better expressed in meters.
Example 17.64 meters is much clearer than 1,764 cm
21:33, 25 Aug 2014, user Materialscientist undid edit by user Msadp06 saying that 'too many images' were added under the 'Forms' subsection of the article. Isn't that a bit subjective and not based on any Wikipedia guidelines or policy? That action by the said user does not make sense to me.
Akhi666 (talk) 19:37, 23 September 2014 (UTC)[reply]
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This map is generated from Fig. 7-1 of the ASCE 7-10 and has been carefully vetted and digitized to provide the most accurate representation of the data.
Nathanpwilkerson (talk) 19:54, 6 September 2015 (UTC)[reply]
Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format. JustBerry (talk) 00:36, 8 September 2015 (UTC)[reply]
To an expert's eye, this photo is rime ice, not snow. Rime ice forms from supercoolded cloud drops, not from snowflakes. In many cases there is mixture of rime ice and snow on trees in mountaneous areas, but since this is clearly mostly rime ice, the photo could be replaced with something more snowy.
RATLAM (talk) 21:09, 15 December 2015 (UTC)[reply]
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IMO, this article wouldn't pass a reassessment for GA. It has acquired a lot of clutter, since its 2009 assessment. For example, there are two snow-cover animations, neither of which describe the year in which they occurred. One is titled: "An animation (satellite images) showing seasonal snow changes", the other, "These snow cover maps... [a million words in between]... in the Southern Hemisphere." I propose to eliminate the second one and improve the caption on the first one. Also, there are North America-centric graphics, which should not be part of a general article on snow, unless there is something especially noteworthy about NA that explains the phenomenon of snow, compared to other regions. I plan to delete both images, unless I receive pushback here. User:HopsonRoad 22:32, 25 November 2016 (UTC)[reply]
It would appear as though the section on "Forms" was added since the last review without citation. I'm not sure on its purpose since it overlaps with both the sections on cause and types. I think anyone looking to salvage this article should focus their attention on this section. JollyΩJanner 22:59, 26 November 2016 (UTC)[reply]
I have substantially rewritten this article, as I could have done with no reassessment in the offing, and feel that the result merits retaining WP:GA status. User:HopsonRoad 23:23, 3 December 2016 (UTC)[reply]
Watch this space for a reorganization and rewrite[edit]
I have outlined a reorganization and rewritten the lede at Talk:Snow/Sandbox. Please post your comments here, as the rewrite progresses. User:HopsonRoad 23:59, 26 November 2016 (UTC)[reply]
I have archived the article, as of 27 November 2016 at Talk:Snow/Sandbox in commented-out text below the visible text. I have substituted new text down to the "Types" section. User:HopsonRoad 03:14, 28 November 2016 (UTC)[reply]
Having reviewed the GA standards and having received no advice to the contrary, I've retained this article's status as a WP:GA.User:HopsonRoad 23:21, 3 December 2016 (UTC)[reply]
I believe the radar animated GIF of the US blizzard to be incorrect. The caption states that blue represents snow and green represents rain. That is true in many cases, but the radar shown clearly shows only precipitation intensity, and not type. The blue areas show the lightest precipitation, not the kind. 2602:30A:2C26:2C90:9CCF:BB74:221D:ECEC (talk) 15:43, 13 May 2017 (UTC)[reply]
Thanks for the comment. I'll try to find an image that correctly portrays a snowstorm. User:HopsonRoad 16:28, 13 May 2017 (UTC)[reply]
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Not done: According to the page's protection level you should be able to edit the page yourself. If you seem to be unable to, please reopen the request with further details. You have already edited the page. Gulumeemee (talk) 02:26, 8 January 2018 (UTC)[reply]
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In section with plow images, caption "Trucks plowing snow on a highway in Indiana" seems to be wrong. Should be Missouri according to image detail page. — Preceding unsigned comment added by 216.228.172.119 (talk) 09:20, 15 January 2018 (UTC)[reply]
Corrected with thanks to the commenter. Cheers, User:HopsonRoad 14:00, 15 January 2018 (UTC)[reply]
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I don't support inclusion of this image, because it doesn't support a facet of the article in a manner not provided by existing images. Also, it is quite dark. Sincerely, HopsonRoad (talk) 15:53, 6 September 2022 (UTC)[reply]
@HopsonRoad: Thank you for your detailed reply. You raise some good points about the existing infobox image and the proposed. There haven't been any other responses so far, but for now, let's leave the current image as it is. —Bruce1eetalk 13:36, 8 September 2022 (UTC)[reply]
Semi-protected edit request on 23 October 2022[edit]
This edit request has been answered. Set the |answered= or |ans= parameter to no to reactivate your request.
Under "Measurement and classification", in the table headed "Frozen precipitation particles, related to snow crystals", please remove superfluous manual line breaks in the table text. Half of the lines are too long (though this may not be evident on a wider screen than my 1280px monitor) and half are too short, and it looks terrible. 80.41.133.154 (talk) 00:53, 23 October 2022 (UTC)[reply]
Done. --Mvqr (talk) 09:38, 23 October 2022 (UTC)[reply]
In the scientific community of snow experts, "metamorphosis" is the term of art that encompasses a wide range of processes, including thawing, freezing, sintering, sublimating, compaction, drifting, described both at the crystal level and the snowpack level. These processes don't necessarily occur in a set order. While I appreciate that you were trying to avoid MOS:JARGON, I suggest that "change" is just too pedestrian a word to properly evoke what is described.
In another section, you suggested "Effects on non-human life", which seemed stilted to me, so I suggested "Effects on plants and animals", which you suggested might be deficient. How about "Effects on organisms" with the lead sentence saying, "Plants, animals and other organisms endemic to snowbound...."?
I'm much happier with "metamorphism" than "metamorphosis". It's plenty sophisticated, but also plain accurate. The rest is no big deal to me, thanks for the advice! InedibleHulk (talk) 07:05, 28 January 2023 (UTC)[reply]
Edit request for "Worldwide occurrence of snowfall" map[edit]
level-3 vital article is rated GA-class on Wikipedia's content assessment scale.
This article was the subject of a Wiki Education Foundation-supported course assignment, between 5 October 2020 and 20 November 2020. Further details are available on the course page. Student editor(s): J Yip. Peer reviewers: IJThomas.
Done Thanks, and well spotted. Adrian J. Hunter(talk•contribs) 23:19, 1 December 2010 (UTC)
Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format. JustBerry (talk) 00:36, 8 September 2015 (UTC)
An editor has reviewed this edit and fixed any errors that were found.
Not done: According to the page's protection level you should be able to edit the page yourself. If you seem to be unable to, please reopen the request with further details. You have already edited the page. Gulumeemee (talk) 02:26, 8 January 2018 (UTC)
Not done for now: please establish a consensus for this alteration before using the 
Done Thank you for this observation! HopsonRoad (talk) 15:41, 29 December 2023 (UTC)
