1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, and 1990. This element was computed using snowfall data from the National Climatic Data Center's United States Climatology database. The extreme date is the ... National Oceanic and Atmospheric Administration.
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1974. This polygon cover consists of all the lakes in Arizona. Digitized from the 1:500,000 scale, 'Hydrologic Unit Map - 1974. Arizona State Land Department.