b'Wet-Bulb Temperature ChartGood Snow Quality Poor Snow Quality No SnowmakingHumidity10% 15% 20% 25% 30% 35% 40% 45% 50% 55% 60% 65% 70% 75% 80% 85% 90% 95% 100%20 14 14 14 15 15 15 16 16 16 17 17 18 18 18 19 19 19 20 2021 14 15 15 16 16 16 17 17 17 18 18 18 19 19 19 20 20 21 2122 15 16 16 16 17 17 17 18 18 19 19 19 20 20 20 21 21 22 2223 16 16 17 17 18 18 18 19 19 19 20 20 21 21 21 22 22 22 2324 17 17 18 18 18 19 19 20 20 20 21 21 22 22 22 23 23 23 2425 18 18 18 19 19 20 20 20 21 21 22 22 22 23 23 24 24 24 2526 18 18 19 20 20 20 21 21 22 22 23 23 23 24 24 25 25 25 2627 19 19 20 20 21 21 22 22 23 23 23 24 24 25 25 26 26 26 2728 20 20 21 21 22 22 23 23 23 24 24 25 25 26 26 27 27 27 2829 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 28 2930 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 29 3031 22 22 23 23 24 25 25 26 26 27 27 28 28 29 29 29 30 30 3132 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 3233 23 24 24 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 3334 24 25 25 26 26 27 27 28 29 29 30 30 31 31 32 32 33 33 3435 25 25 26 27 27 28 28 29 29 30 31 31 32 32 33 33 34 34 3536 25 26 27 27 28 29 29 30 30 31 31 32 33 33 34 34 35 35 3637 26 27 27 28 29 29 30 31 31 32 32 33 34 34 35 35 36 37 3738 27 28 28 29 29 30 31 31 32 33 33 34 35 35 36 36 37 38 38THE DAY 39 27 29 29 30 30 31 32 32 33 34 34 35 35 36 37 37 38 39 3940 28 30 30 30 31 32 32 33 34 34 35 36 36 37 38 38 39 40 40YOU KNOWNO LIMIT watching temperature and humidity is key to getting the perfect mix from the snowgunsthe inside story behind windham mountain snow - continued from page 47 -wet bulb to gauge when they can make snow. There are timesvery large quantities of ice along with the ability to transport the when you can make good quality snow at 29 degrees, if theshaved ice up a mountain and spread it around. humidity is 10% or less and there are times when you cant makeIt wasnt until the late 1940s that the forerunner to modern quality snow at a temperature of 21 degrees and 95% humidity.snowmaking started to evolve and, as with so many inventions The table above shows how temperature and humidity affect theand innovations, it wasnt related to the ski industry. Instead it production of machine-made snow. had to do with the process of de-icing airplanes. To simulateTemperatures arent always consistent across a ski areas ANOTHER BEST DAY slopes. This is especially the case early in the season when coldervarious weather conditions such as icing, sleet and snow,engineers experimented with various water hose nozzlesair tends to settle at the base of the mountain and in the valleys.and pressures. Inversions can occur in mid-winter with very mild Around the same time, Larchmont Farms Company intemperatures on a mountain summit, while being well belowLexington, Massachusetts, was testing ways to protect orange freezing at mid-mountain or at the base. This means that everycrops in Florida from freezing by spraying water on them. They snow gun at Windham must be adjusted for optimal productiontried different irrigation nozzles and on one particularly cold given localized climate zones on the mountain.night they managed to produce snow to their surprise.Lets take a look at the history of snowmaking to betterThese developments caught the attention of two resortunderstand the process and how it has evolved over time. Thereoperators, Mohawk Mountain in Connecticut and Split Rock were a few instances dating back to the 1930s where the earliestLodge (now Big Boulder), in Pennsylvania. Both installedforms of snowmaking were nothing more than shaved ice. In onetemporary systems for the 1950-1951 season which turned out case, a ski jumping competition in Toronto, Canada was in to be big successes for both resorts. In 1952, the first major jeopardy of being canceled due to lack of snow and some snowmaking installation was built at Grossingers Resort, near entrepreneurial individuals came up with the idea of shavingMonticello, in New York. Grossingers management said that roughly 75 tons of ice. They managed to cover the jump andsnowmaking was no longer a luxury and instead a necessity.landing area with up to eight inches of what really was an icyMaking snow is only half of the skiing and snowboarding consistency. It was reported that the speeds on the jump wereequation, with the other half being grooming. I recall my first as much as 20% faster and the jumps considerably longer. Thatencounter with grooming at the Simpson Memorial Ski Slopes sounds like what a typical skier or snowboarder would in Phoenicia in the southern Catskills, circa 1960. All members of experience on the slopes now, after rain and a quick freeze. the ski patrol and ski school were out on the slopes beforeHollywood also had a need for snow in many movie shoots,opening side-stepping and packing the snow with their skis! and the same technique was usedonly this time with theGrooming started around the same time as snowmaking with addition of fans to provide the image of blowing snow. Clearly,some rudimentary attempts at packing snow with rollers. The making snow to cover a ski areas slopes with shaved ice requirespractice came about in the Swiss Alps as snow covered roads continued on STEF CANDEpage 51windhammountain.com800-754-9463 49ROSSIGNOL WINDHAM 2019.indd 1 8/28/19 11:23 AM'