Last updated
Snow production at Camelback Ski Area, United States. SuperCrystal@Camelback.jpg
Snow production at Camelback Ski Area, United States.

Snowmaking is the production of snow by forcing water and pressurized air through a "snow gun", also known as a "snow cannon". Snowmaking is mainly used at ski resorts to supplement natural snow. This allows ski resorts to improve the reliability of their snow cover and to extend their ski seasons from late autumn to early spring. Indoor ski slopes use snowmaking. They can generally do so year-round as they have climate-controlled environments.


The use of snowmaking machines is becoming increasingly common as changing weather patterns and the rising popularity of indoor ski resorts create a demand for snow beyond that which is provided by nature. Snowmaking machines have addressed the shortage in the supply of snow; however, there are significant environmental costs associated with the artificial production of snow.

According to the European Environment Agency, the length of snow seasons in the northern hemisphere has decreased by five days each decade since the 1970s, thus increasing the demand for the production of artificial snow. Some ski resorts use artificial snow to extend their ski seasons and augment natural snowfall; however, there are some resorts that rely almost entirely upon artificial snow production. [1] Artificial snow was used extensively at the 2014 Winter Olympics in Sochi, and the 2018 Winter Olympics in Pyeongchang to supplement natural snowfall and provide the best possible conditions for competition. [2]

The production of snow requires low temperatures. The threshold temperature for snowmaking increases as humidity decreases. Wet-bulb temperature is used as a metric since it takes air temperature and relative humidity into account. The bulb temperature is always below the outside temperature. The damper the air, the less moisture it can absorb. The higher the atmospheric humidity, the colder it must be to turn the small water droplets into snow crystals.

Examples Celsius

Examples Fahrenheit

To start a snowmaking system a wet-bulb temperature of −2.5 °C (27.5 °F) is required. If the atmospheric humidity is very low, this level can be reached at temperatures slightly above 0 °C (32 °F), but if the air humidity is high, colder temperatures are required. Temperatures around freezing point are referred to as borderline temperatures or limit temperatures. [3] If the wet-bulb temperature drops, more snow can be produced faster and more efficiently.

Snowmaking is a relatively expensive process in its energy use, thereby limiting its use.


In 1934, Warner Bros. technical director Louis Geib conjured a cold and wet blizzard on a sunny back lot in Burbank. His invention—the first known snowmaking machine—consisted of three rotating blades that shaved ice from a 400-pound block and a high-powered fan that blew the resulting particles into the air. A low-tech precursor to the water-crystallizing snow guns that is used each winter at about 90 percent of the country's ski resorts, Geib's machine was ideal for close-ups and, as the movie's child actors learned, snowballs, though they disappeared quickly under the hot Hollywood lights. Geib's innovation was also a hit off-screen, as the burgeoning ski business—which sometimes trucked in snow for big events—began experimenting with the same technology. In the winter of 1934, the Toronto Ski Club re-purposed an ice planer from a local skating rink when nature did not provide cover for a scheduled competition. [4]

Art Hunt, Dave Richey, and Wayne Pierce invented the snow cannon in 1950, [5] [6] but secured a patent sometime later. [7] In 1952, Grossinger's Catskill Resort Hotel became the first in the world to use artificial snow. [8] Snowmaking began to be used extensively in the early 1970s. Many ski resorts depend heavily upon snowmaking.

Snowmaking has achieved greater efficiency with increasing complexity. Traditionally, snowmaking quality depended upon the skill of the equipment operator. Computer control supplements that skill with greater precision, such that a snow gun operates only when snowmaking is optimal.


A graph of air temperature against relative humidity: if conditions are below the curve, snow can be made. Snow making curve.svg
A graph of air temperature against relative humidity: if conditions are below the curve, snow can be made.

The key considerations in snow production are increasing water and energy efficiency and increasing the environmental window in which snow can be made.

Snowmaking plants require water pumps and sometimes air compressors when using lances that are both very large and expensive. The energy required to make artificial snow is about 0.6–0.7 kW h/m3 for lances and 1–2 kW h/m3 for fan guns. The density of artificial snow is between 400 and 500 kg/m3 and the water consumption for producing snow is roughly equal to that number. [9]

Snowmaking begins with a water supply such as a river or reservoir. Water is pushed up a pipeline on the mountain using very large electric pumps in a pump house. This water is distributed through an intricate series of valves and pipes to any trails that require snowmaking. Many resorts also add a nucleating agent to ensure that as much water as possible freezes and turns into snow. These products are organic or inorganic materials that facilitate the water molecules to form the proper shape to freeze into ice crystals. The products are non-toxic and biodegradable.

Pump house and air plant combination Pump house.jpg
Pump house and air plant combination

The next step in the snowmaking process is to add air using an air plant. This plant is often a building which contains electric or diesel industrial air compressors the size of a van or truck. However, in some instances air compression is provided using diesel-powered, portable trailer-mounted compressors which can be added to the system. Many fan-type snow guns have on-board electric air compressors, which allows for cheaper and more compact operation. A ski area may have the required high-output water pumps, but not an air pump. Onboard compressors are cheaper and easier than having a dedicated pumping house. The air is generally cooled and excess moisture is removed before it is sent out of the plant. Some systems even cool the water before it enters the system. This improves the snowmaking process as the less heat in the air and water, the less heat must be dissipated to the atmosphere to freeze the water. From this plant the air travels up a separate pipeline following the same path as the water pipeline.

Ice nucleation-active proteins

The water is sometimes mixed with ina (ice nucleation-active) proteins from the bacterium Pseudomonas syringae . These proteins serve as effective nuclei to initiate the formation of ice crystals at relatively high temperatures, so that the droplets will turn into ice before falling to the ground. The bacterium itself uses these ina proteins in order to injure plants. [10]


Piping diagram Snowmaking diagram.svg
Piping diagram

The pipes following the trails are equipped with shelters containing hydrants, electrical power and, optionally, communication lines mounted.

Whereas shelters for fan guns require only water, power and maybe communication, lance shelters usually need air hydrants as well. Hybrid shelters allow maximum flexibility to connect each snow machine type as they have all supplies available. The typical distance for lance shelters is 100–150 feet (30–46 m), for fan guns 250–300 feet (76–91 m). From these hydrants 1+12"–2" pressure resistant hoses are connected similar to fire hoses with camlocks to the snow machine.

The infrastructure to support snowmaking may have a negative environmental impact, altering water tables near reservoirs and mineral and nutrient content of the soil under the snow itself. [11]

Snowmaking guns

Rear view of snow cannon at Mölltaler Gletscher, Austria, showing the powerful fan
Snow making machine.jpg
A snow making machine at Smiggin Holes, New South Wales, Australia
Full blast snow cannon at The Nordic Centre, Canmore, Alberta, Canada

There are many forms of snowmaking guns; however, they all share the basic principle of combining air and water to form snow. For most guns the type or "quality" of snow can be changed by regulating the amount of water in the mixture. For others, the water and air are simply on or off and the snow quality is determined by the air temperature and humidity.

In general there are three types of snowmaking guns: internal mixing, external mixing and fan guns. These come in two main styles of makers: air water guns and fan guns.

An air water gun can be mounted on a tower or on a stand on the ground. It uses higher pressure water and air, while a fan gun uses a powerful axial fan to propel the water jet to a great distance.

Snowmaker in operation

A modern snow fan usually consists of one or more rings of nozzles which inject water into the fan air stream. A separate nozzle or small group of nozzles is fed with a mix of water and compressed air and produces the nucleation points for the snow crystals. The small droplets of water and the tiny ice crystals are then mixed and propelled out by a powerful fan, after which they further cool through evaporation in the surrounding air as they fall to the ground. The crystals of ice act as seeds to make the water droplets freeze at 0 °C (32 °F). Without these crystals the water would supercool instead of freezing. This method can produce snow when the wet-bulb temperature of the air is as high as −1 °C (30 °F). [12] [13] The lower the air temperature is, the more and the better snow a cannon can make. This is one of the main reasons snow cannons are usually operated in the night. The quality of the mixing of the water and air streams and their relative pressures is crucial to the amount of snow made and its quality.

Modern snow cannons are fully computerized and can operate autonomously or be remotely-controlled from a central location. Operational parameters are: starting and stopping time, quality of snow, maximum wet-bulb temperature in which to operate, maximum windspeed, horizontal and vertical orientation, and sweep angle (to cover a wider or narrower area). Sweep angle and area may follow wind direction.

Snow lance used at Flottsbro in Stockholm Snokanon 2009c.jpg
Snow lance used at Flottsbro in Stockholm

Home snowmaking

Smaller versions of the snow machines found at ski resorts exist, scaled down to run off household size air and water supplies. Home snowmakers receive their water supply either from a garden hose or from a pressure washer, which makes more snow per hour. Plans also exist for do-it-yourself snowmaking machines made out of plumbing fittings and special nozzles.

Volumes of snow output by home snowmakers depend on the air/water mixture, temperature, wind variations, pumping capacity, water supply, air supply, and other factors. Using a household spray bottle will not work unless temperatures are well below the freezing point of water.

Extent of use

A ski resort that has compensated for low snowfall by producing artificial snow. Parsenn with artificial snow and Davos as seen from Schwarzhorn.jpg
A ski resort that has compensated for low snowfall by producing artificial snow.

By the 2009–2010 ski season, it was estimated that around 88% of ski resorts belonging to the National Ski Areas Association were using artificial snow to supplement natural snowfall. [14] Since 1985, average aggregate temperatures in the contiguous United States for the months of November through February have consistently been above the average temperatures for those months measured between 1901 and 2000. [15] See Figure 1. Such a trend both limits and encourages the use of artificial snow. Rising temperatures will result in greater snowmelt and decreased snowfall, thus forcing ski resorts to depend more heavily upon the use of artificial snow. However, once temperatures approach 6 °C (43 °F), snowmaking is not viable given the current technology. The image to the right, Photo 1, demonstrates the use of artificial snow to supplement natural snowfall. The strip of white going down the mountain is a ski slope that has been opened due to extensive use of snowmaking technology.

Figure 1. Average winter temperatures for the contiguous United States Winter temp.png
Figure 1. Average winter temperatures for the contiguous United States

As the use of artificial snow becomes more common and efficient, developers may seek to build new or expand existing ski resorts, as was the case with the Arizona Snowbowl ski resort. Such an action could cause significant deforestation, the loss of fragile and rare ecosystems, and cultural opposition. The high costs associated with the production of artificial snow serve as a barrier to entry for its use. It was estimated that in 2008 it cost approximately US$131,000 to purchase a snow gun and develop the necessary infrastructure. Overall, approximately US$61 million have been invested in snowmaking technology in the French Alps, US$1,005 in Austria, and US$415 in Switzerland. [16] Furthermore, 50% of the average American ski resort's energy costs are generated by the production of artificial snow. [14]


Figure 2. Models trends in ski and snowboard resort revenues Ski revenue.png
Figure 2. Models trends in ski and snowboard resort revenues

Snowmaking machines allow ski resorts to extend their seasons and sustain their businesses in times of low snowfall. With changing climate trends, snowfall is becoming increasingly unpredictable, thus jeopardizing the economic success of ski resorts. Between 2008 and 2013, American ski and snowboard resorts experienced annual revenues of about US$3 billion. [17] Such high levels of revenue increase the demand for predictable and adequate amounts of snow cover, which can be achieved through artificial snowmaking practices. While the economic benefit of ski resorts has been around US$3 billion in recent years (see Figure 2), the additional economic value of winter tourism in the United States is estimated to be around US$12.2 billion per year. [17] [14] These additional benefits come in the form of spending at hotels, restaurants, gas stations, and other local businesses. Additionally, winter tourism supports around 211,900 jobs in the United States, which amounts to a total of approximately US$7 billion paid in benefits and salaries, US$1.4 billion paid in state and local taxes, and US$1.7 billion paid in federal taxes. The economic benefits of snow sports are great, but also fragile. It is estimated that in years of lower snowfall, there is about a US$1 billion decrease in economic activity. [14]

Environmental impact and future conditions

Mountain reservoirs

The implementation and use of artificial snow making technologies requires the undertaking of major infrastructural projects. These projects result in significant disruptions to local ecosystems. A major infrastructural project associated with the use of artificial snowmaking technology is the mountain reservoir. Many mountain reservoirs are embankment dams that feed underground water pipelines, and pose significant safety risks to nearby populations and ecosystems. In addition to the hazards posed by conventional reservoirs and dams, mountain reservoirs are subject to a variety of mountain-specific hazards. Such hazards include avalanches, rapid flows, and landslides. Approximately 20% of mountain reservoirs are built on avalanche-prone sites, and about 50% are prone to very high hazards. Additionally, mountain reservoirs expel water very quickly, causing massive floods, and significantly jeopardizing public safety. The severity of these hazards is augmented due to their potential impact on lower populations and properties. [18]

Water and energy use

Snowmaking machines generally require between 3,000 and 4,000 cubic meters of water per hectare of slope covered. [18] Accordingly, it takes approximately 106 gallons (400 litres) of water to produce one cubic meter of snow, and snowmaking machines use about 107 gallons (405 litres) of water per minute. [16] [19] A significant amount of this water is lost due to evaporation, and thus is not returned to the water table. [20] Furthermore, it takes approximately 3.5 to 4.3 kWh of energy to produce one cubic meter of snow; however, this number can be as high as 14 kWh, or as low as 1 kWh per cubic meter of snow. [21] Snowmaking accounts for approximately 50% of the average American ski resort's energy costs, which amounts to about $500,000. [14]

Effects on ground and drinking water

Ski resorts often use mineralized water in the production of artificial snow, which has adverse impacts on surrounding ecosystems and water tables. Mountain reservoirs are often filled with highly mineralized water, and the runoff from these reservoirs affects the mineral and chemical composition of groundwater, which in turn pollutes drinking water. Furthermore, mountain reservoirs do not allow water to seep back into the ground, so water is only returned to the water table through runoff. [18]

Environmental conditions and forecasts

As a result of changing weather patterns, snowmaking has become a major revenue-making activity due to a shortage in the supply of natural snow. However, it poses significant environmental threats that may serve to perpetuate the issue that resulted in an increased demand for artificial snow in the first place.

The EPA forecasts temperatures to increase by between 0.28 °C (0.5 °F) and 4.8 °C (8.6 °F) globally with a likely increase of 1.5 °C (2.7 °F), and an average increase in temperatures in the US of between 1.7 °C (3 °F) and 6.7 °C (12 °F) by 2100. Furthermore, scientists predict that snow cover in the northern hemisphere will decrease by 15% by the end of the century with snowpack decreasing and snow seasons shortening concurrently. [22] These predicted changes in temperature and snowfall patterns will induce ski resorts to rely more heavily upon artificial snow which uses significant amounts of water and electricity. As a result, ski resorts will further contribute to the production of greenhouse gases and the issue of water scarcity.

In addition to long-term environmental impacts, artificial snow production poses immediate environmental challenges. Artificial snow takes around two to three weeks longer to melt than does natural snow. As such, the use of artificial snow introduces new threats and challenges to local flora and fauna. Furthermore, the high mineral and nutrient content of the water used to produce artificial snow changes soil composition, which in turn affects which plants are able to grow. [20]

Secondary effects

In addition to the direct effects of the production of artificial snow, snowmaking practices result in various secondary effects.


Positive externalities resulting from the production of artificial snow include: positive impacts on local economies, increased firefighting capabilities, increased opportunities for physical activity, and improved competition conditions. The reservoirs and pipelines that are constructed to transport water to ski resorts increase the amount of water available to firefighters in the event of a wildfire. Furthermore, producing artificial snow allows ski resorts to extend the amount of time that they are operational, thus increasing opportunities for people to participate in outdoor physical activities. [23] Finally, the composition of snow produced using snow guns differs from that of natural snow, and as such provides for improved conditions for winter sports competitions. [2]


The most visible negative externalities resulting from snowmaking are the adverse environmental impacts. However, in addition to environmental impacts, the production of artificial snow results in significant negative cultural and social externalities. Such externalities include issues regarding land use and land rights. Many ski resorts rent out mountains and slopes from the US Forest Service, which raises questions surrounding how the land can and should be used, and who should be the arbiter of determining appropriate uses.

A specific example of a negative cultural externality is the contention surrounding use of artificial snow at Arizona Snowbowl, a ski resort in Northern Arizona. Arizona Snowbowl is situated in the San Francisco peaks, which are one of the holiest sites for various Native American tribes in the Four Corners area, including the Navajo Nation. In 2004, Arizona Snowbowl was renting its slopes from the US Forest Service, and was looking to build new ski slopes and increase the production of artificial snow. The proposed project would involve the clearing of approximately 74 acres of forest, the use of reclaimed water to produce artificial snow, the construction of a three-acre holding pond for reclaimed water, and the installation of an underground pipeline. A group of plaintiffs made up of members from six Native American tribes and various other organizations filed a lawsuit against the US Forest Service and Arizona Snowbowl. Plaintiffs alleged that undertaking such a project would significantly alter and damage the cultural and spiritual nature of the mountain. This legal challenge ultimately failed in 2009. [24]

Other uses

In Swedish, the phrase "snow cannon" (Snökanon) is used to designate the lake-effect snow weather phenomenon. For example, if the Baltic sea is not yet frozen in January, cold winds from Siberia may lead to significant snowfall.

See also

Related Research Articles

Snow Precipitation in the form of ice crystal flakes

Snow comprises individual ice crystals that grow while suspended in the atmosphere—usually within clouds—and then fall, accumulating on the ground where they undergo further changes. It consists of frozen crystalline water throughout its life cycle, starting when, under suitable conditions, the ice crystals form in the atmosphere, increase to millimeter size, precipitate and accumulate on surfaces, then metamorphose in place, and ultimately melt, slide or sublimate away.

Hygrometer Instrument used for measuring the moisture content in the atmosphere

A hygrometer is an instrument used to measure the amount of water vapor in air, in soil, or in confined spaces. Humidity measurement instruments usually rely on measurements of some other quantities such as temperature, pressure, mass, a mechanical or electrical change in a substance as moisture is absorbed. By calibration and calculation, these measured quantities can lead to a measurement of humidity. Modern electronic devices use temperature of condensation, or changes in electrical capacitance or resistance to measure humidity differences. The first crude hygrometer was invented by the Italian Renaissance polymath Leonardo da Vinci in 1480. Major leaps forward came during the 1600s; Francesco Folli invented a more practical version of the device, while Robert Hooke improved a number of meteorological devices including the hygrometer. A more modern version was created by Swiss polymath Johann Heinrich Lambert in 1755. Later, in the year 1783, Swiss physicist and Geologist Horace Bénédict de Saussure invented the first hygrometer using human hair to measure humidity.

Precipitation Product of the condensation of atmospheric water vapor that falls under gravity

In meteorology, precipitation is any product of the condensation of atmospheric water vapor that falls under gravitational pull from clouds. The main forms of precipitation include drizzling, rain, sleet, snow, ice pellets, graupel and hail. Precipitation occurs when a portion of the atmosphere becomes saturated with water vapor, so that the water condenses and "precipitates" or falls. Thus, fog and mist are not precipitation but colloids, because the water vapor does not condense sufficiently to precipitate. Two processes, possibly acting together, can lead to air becoming saturated: cooling the air or adding water vapor to the air. Precipitation forms as smaller droplets coalesce via collision with other rain drops or ice crystals within a cloud. Short, intense periods of rain in scattered locations are called showers.

Spray painting A painting technique in which a device sprays coating material through the air onto a surface

Spray painting is a painting technique in which a device sprays coating material through the air onto a surface. The most common types employ compressed gas—usually air—to atomize and direct the paint particles. Spray guns evolved from airbrushes, and the two are usually distinguished by their size and the size of the spray pattern they produce. Airbrushes are hand-held and used instead of a brush for detailed work such as photo retouching, painting nails, or fine art. Air gun spraying uses generally larger equipment. It is typically used for covering large surfaces with an even coating of liquid. Spray guns can be either automated or hand-held and have interchangeable heads to allow for different spray patterns. Single color aerosol paint cans are portable and easy to store.

Evaporative cooler Device that cools air through the evaporation of water

An evaporative cooler is a device that cools air through the evaporation of water. Evaporative cooling differs from other air conditioning systems, which use vapor-compression or absorption refrigeration cycles. Evaporative cooling uses the fact that water will absorb a relatively large amount of heat in order to evaporate. The temperature of dry air can be dropped significantly through the phase transition of liquid water to water vapor (evaporation). This can cool air using much less energy than refrigeration. In extremely dry climates, evaporative cooling of air has the added benefit of conditioning the air with more moisture for the comfort of building occupants.


Psychrometrics, psychrometry, and hygrometry are names for the field of engineering concerned with the physical and thermodynamic properties of gas-vapor mixtures. The term comes from the Greek psuchron (ψυχρόν) meaning "cold" and metron (μέτρον) meaning "means of measurement".

Refrigerator Household or industrial appliance for preserving food at a low temperature

A refrigerator is a home appliance consisting of a thermally insulated compartment and a heat pump that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. Refrigeration is an essential food storage technique in developed countries. The lower temperature lowers the reproduction rate of bacteria, so the refrigerator reduces the rate of spoilage. A refrigerator maintains a temperature a few degrees above the freezing point of water. Optimum temperature range for perishable food storage is 3 to 5 °C. A similar device that maintains a temperature below the freezing point of water is called a freezer. The refrigerator replaced the icebox, which had been a common household appliance for almost a century and a half.


A humidifier is a device, primarily an electrical appliance, that increases humidity (moisture) in a single room or an entire building. In the home, point-of-use humidifiers are commonly used to humidify a single room, while whole-house or furnace humidifiers, which connect to a home's HVAC system, provide humidity to the entire house. Medical ventilators often include humidifiers for increased patient comfort. Large humidifiers are used in commercial, institutional, or industrial contexts, often as part of a larger HVAC system.

Camelback Mountain Resort

Camelback Mountain Resort is a ski and snowboard resort located in the Pocono Mountains region in Pocono Township and Jackson Township, Monroe County, Pennsylvania, adjacent to, and partially within Big Pocono State Park. In the 1950s when developers were working to expand the original solitary ski run, they negotiated with the then PA DER for permission to use a small portion of the state park for the ski area in exchange for $1 a year and the obligation to maintain the entire park.

Wet-bulb temperature Temperature read by a thermometer covered in water-soaked cloth

The wet-bulb temperature (WBT) is the temperature read by a thermometer covered in water-soaked cloth over which air is passed. At 100% relative humidity, the wet-bulb temperature is equal to the air temperature ; at lower humidity the wet-bulb temperature is lower than dry-bulb temperature because of evaporative cooling.

An atmospheric water generator (AWG) is a device that extracts water from humid ambient air. Water vapor in the air can be extracted by condensation - cooling the air below its dew point, exposing the air to desiccants, or pressurizing the air. Unlike a dehumidifier, an AWG is designed to render the water potable. AWGs are useful where pure drinking water is difficult or impossible to obtain, because there is almost always a small amount of water in the air that can be extracted. The two primary techniques in use are cooling and desiccants.

Arizona Snowbowl Ski area in Coconino County, Arizona

Arizona Snowbowl is an alpine ski resort in the southwest United States, located on the San Francisco Peaks of northern Arizona, seven miles (11 km) north of Flagstaff. The Snowbowl ski area covers approximately one percent of the San Francisco Peaks, and its slopes face west and northwest.

Hunter Mountain (ski area)

Hunter Mountain is a ski resort located in Greene County, New York about three hours northwest of New York City in the town of Hunter, New York. It features a 1,600-foot (488 m) vertical drop.

Blue Mountain Resort

Blue Mountain Resort is a ski resort located near Palmerton, Pennsylvania, on Blue Mountain in the northern part of the Lehigh Valley, in Pennsylvania. Blue Mountain serves the Allentown, Philadelphia, New York City, and Wilmington urban areas, as well as Carbon County, Schuylkill County, and the Hazleton area.

Snow Summit

Snow Summit is a ski resort that was established in 1952 and is in the San Bernardino Mountains in Southern California. It is located by Big Bear Lake along with its sister resort Bear Mountain; these two resorts which operate under the same management are collectively known as Big Bear Mountain Resorts (BBMR).

Seven Springs Mountain Resort All-season resort in Pennsylvania, US

Seven Springs Mountain Resort is an all-season resort located in the borough of Seven Springs, Pennsylvania, USA. It has a relatively high elevation for a Pennsylvania ski area, at 3,001 feet (915 m) above sea level. Other activities include downhill bike park, canopy tours, ziplining, sporting clays, fishing, hiking and golfing in the summer and skiing, snowboarding and snow tubing in the winter. The ski season at Seven Springs typically begins on the day after Thanksgiving and continues to mid-April, weather permitting.

Elk Mountain Ski Area

Elk Mountain Ski Resort is a ski area in the Endless Mountains on the summit of North Knob in Herrick Township, Susquehanna County, near Union Dale, Pennsylvania. It is located 30 miles north of Scranton, PA. The mountain has been given favorable reviews from Ski Magazine, including a listing in "Six Unsung Heroes", a roundup of hidden gems in skiing.

Bristol Mountain Ski Resort

Bristol Mountain, formally known as Bristol Mountain Winter Resort, is a ski resort located in South Bristol, New York in the Finger Lakes region. It is located 30 miles (48 km) from the center of Rochester, New York, the nearest major city to the resort, and about 10 miles (16 km) from Canandaigua on NY 64.

Mount Tom Ski Area

Mount Tom Ski Area was a ski resort in Holyoke, Massachusetts, in the Mount Tom Range in the western part of Massachusetts about 10 miles north of Springfield. It opened in 1962 and closed in 1998. The slopes of the former ski area are located off U.S. Route in the Smith's Ferry neighborhood of Holyoke, adjacent to the former Mountain Park, now a music venue. Both Mountain Park and Mt. Tom were once owned by the O'Connell Construction Company. It was rumored that Mt. Tom was created so that the company could keep seasonal workers working during the winter and keep them available for the summer construction season. Since its closure arsonists have destroyed much of the former resort's buildings. In late 2016, a brush fire burned on the former ski slopes, burning mostly loose brush. No buildings caught fire in that event. However from 2016 on, several smaller shacks were burned to the ground. In March 2018, the former ski rental shop was completely destroyed by a fire, and on February 23, 2020, the main lodge was almost entirely destroyed. While snowmaking equipment and chairlifts have been removed, small numbers of skiers in recent years have continued to ascend the area's slopes on foot. In 2017, a proposal from a local-area resident was brought to the city planning board's attention to re-open the ski area. As of 2021, no proposals have been successful.

The Mount Buller Alpine Resort is a ski resort located in the Alpine region of the Australian state of Victoria.


  1. "Snow-making companies in a warming world". The Economist. Retrieved 2018-03-04.
  2. 1 2 "Fake snow dominates the Winter Olympics". USA TODAY. Retrieved 2018-03-06.
  3. "Frequently asked questions about TechnoAlpin and snowmaking technology". Retrieved 2019-10-22.
  4. White, April. "How Artificial Snow Was Invented". Smithsonian. Retrieved 2019-12-11.
  5. Selingo, Jeffrey (2001-02-02). "Machines Let Resorts Please Skiers When Nature Won't". New York Times . Retrieved 2010-05-23.
  6. "Making Snow". Retrieved 2006-12-16.
  7. USpatent 2676471,W. M. Pierce, Jr.,"Method for Making and Distributing Snow",issued 1950-12-14
  8. On This Day: March 25, BBC News, accessed December 20, 2006. "The first artificial snow was made two years later, in 1952, at Grossinger's resort in New York, USA. "
  9. Jörgen Rogstam & Mattias Dahlberg (April 1, 2011), Energy usage for snowmaking (PDF)
  10. Robbins, Jim (May 24, 2010), "From Trees and Grass, Bacteria That Cause Snow and Rain", The New York Times
  11. Dambeck, Holger (18 April 2008). "Artificial Snow Harming Alpine Environment, Researchers Warn". Spiegel Online . Retrieved 23 February 2018.
  12. Liu, Xiaohong (2012). "What processes control ice nucleation and its impact on ice-containing clouds?" (PDF). Pacific Northwest National Laboratory . Archived from the original (PDF) on 2016-11-24. Retrieved 2019-10-26.
  13. Kim, H. K. (1987-07-07). "Xanthomonas campestris pv. translucens Strains Active in Ice Nucleation" (PDF). The American Phytopathological Society . Retrieved 2016-11-23.
  14. 1 2 3 4 5 Burakowski, Elizabeth; Magnusson, Matthew (December 2012). "Climate Impacts on the Winter Tourism Economy in the United States" (PDF).
  15. 1 2 "Climate at a Glance | National Centers for Environmental Information (NCEI)". Retrieved 2018-03-04.
  16. 1 2 Pickering, Catherine Marina; Buckley, Ralf C. (2010). "Climate Response by the Ski Industry: The Shortcomings of Snowmaking for Australian Resorts". Ambio. 39 (5/6): 430–438. doi:10.1007/s13280-010-0039-y. JSTOR   40801536. PMC   3357717 . PMID   21053726.
  17. 1 2 3 "U.S. ski & snowboard resorts revenue 2013 | Statistic". Statista. Retrieved 2018-03-04.
  18. 1 2 3 Evette, André; Peyras, Laurent; François, Hugues; Gaucherand, Stéphanie (2011-09-30). "Environmental Risks and Impacts of Mountain Reservoirs for Artificial Snow Production in a Context of Climate Change". Revue de géographie alpine (in French) (99–4). doi: 10.4000/rga.1481 . ISSN   0035-1121.
  19. Fountain, Henry (2014-02-03). "An Olympian Snow Endeavor in Sochi". The New York Times. ISSN   0362-4331 . Retrieved 2018-03-04.
  20. 1 2 Dambeck, Holger (2008-04-18). "A Slippery Slope: Artificial Snow Harming Alpine Environment, Researchers Warn". Spiegel Online. Retrieved 2018-03-04.
  21. Rogstam, Jörgen; Dahlberg, Mattias (April 1, 2011). "Energy usage for snowmaking" (PDF). Bächler.
  22. EPA,OAR,OAP,CCD, US. "Future of Climate Change". Retrieved 2018-03-04.CS1 maint: multiple names: authors list (link)
  23. "Facts on Snowmaking" (PDF).
  24. "Native Americans Fight to Save Sacred Site" . Retrieved 2018-03-04.