Snowmaking is the production of snow by forcing water and pressurized

air through a snow gun/snow cannon on ski slopes. Snowmaking is mainly used at ski resorts to supplement natural snow. This allows resorts to improve the reliability of their snow cover and to extend their ski seasons. Indoor ski slopes often use snowmaking. They can generally do so year-round as they have a climate-controlled environment. The production of snow requires low temperatures.Wet bulb temperature is used as a metric since it takes air temperature and relative humidity into account.