Technical Abstract: Because of the need for precipitation data sets that can be used for hydrological studies that are international in scope, The World Meteorological Organization (WMO) established a study to determine snowfall catch relationships between precipitation gages that are used by several countries. One of the test sites was established by the U.S. Department of Agricultural-Agricultural Research Service on the Reynolds Creek Experimental Watershed in southwest Idaho in the fall of 1987 and operated through the spring of 1994 to compare precipitation catch between nine measuring systems. Precipitation gages form the United States, Soviet Union and Canada were located at this site. The Wyoming shielded gage and the dual-gage system from the United States, double-fence lded gage from the Soviet Union and Nipher gage from Canada measured comparable amounts of snowfall. An unshielded gage mounted with its orifice at 3.05 m above ground had the least catch. The information from the Idaho site is now being used along with information from other sites in an attempt to develop uniform precipitation data sets that can be used for international studies.