Precipitation annual maximum series (inches) Station ID: 39-3452 Station name: GREGORY State: SD Latitude (decimal degrees): 43.2356 Longitude (decimal degrees): -99.4339 Elevation (feet): 2160 Duration: 1 day 07/09/1909 1.80 07/17/1923 5.21 06/19/1924 1.40 09/18/1926 2.17 04/14/1927 1.24 06/11/1928 1.10 05/27/1929 1.50 08/16/1930 1.92 05/09/1931 1.47 06/08/1932 2.01 08/22/1933 2.30 09/10/1934 1.79 05/19/1935 1.43 09/14/1936 1.40 06/04/1937 1.87 04/27/1938 2.76 05/27/1939 2.46 03/28/1940 1.17 10/26/1941 2.73 04/30/1942 2.61 06/01/1943 1.80 06/11/1944 4.20 08/16/1945 1.90 10/05/1946 2.75 11/06/1947 1.95 08/15/1949 1.53 05/05/1950 1.75 08/14/1951 1.57 08/19/1952 1.55 06/27/1953 1.14 06/02/1954 2.20 08/23/1955 1.37 08/07/1956 1.60 07/01/1957 4.20 05/13/1958 1.73 05/28/1959 2.16 06/15/1960 2.42 07/01/1961 1.27 08/02/1962 2.33 09/19/1963 2.42 06/16/1964 1.85 07/06/1965 2.75 07/08/1966 1.90 09/18/1967 1.35 06/24/1968 1.98 09/04/1969 2.00 04/12/1970 1.95 08/30/1971 2.00 07/17/1972 2.34 05/27/1973 2.10 06/09/1974 4.00 06/17/1975 1.70 04/16/1976 1.10 09/12/1977 2.00 05/29/1978 1.05 10/31/1979 1.90 06/27/1980 2.40 07/02/1981 3.69 10/10/1982 1.90 05/01/1983 2.07 05/27/1984 1.80 08/12/1985 2.20 06/10/1986 2.90 08/06/1987 2.20 08/03/1988 3.30 07/14/1989 2.65 07/19/1990 1.85 05/25/1991 1.40 07/25/1992 3.10 09/19/1993 1.60 09/04/1994 1.97 09/30/1995 2.50 09/19/1996 3.50 10/12/1997 2.84 10/03/1998 5.20 05/05/1999 2.85 05/18/2000 1.75 04/23/2001 2.50 04/28/2002 1.38 09/21/2004 2.83 06/22/2005 3.70 09/22/2006 1.30 05/05/2007 2.20 06/03/2008 1.62 06/12/2010 2.11 Duration: 2 days 07/09/1909 1.94 07/17/1923 5.61 06/18/1924 1.92 09/18/1926 2.34 04/13/1927 1.74 06/11/1928 1.37 10/03/1929 2.21 08/16/1930 2.14 05/09/1931 2.39 06/08/1932 2.16 08/22/1933 2.48 09/09/1934 2.12 05/18/1935 1.81 04/28/1936 1.68 06/04/1937 2.17 04/27/1938 2.97 05/26/1939 2.65 06/03/1940 1.67 10/26/1941 2.94 05/12/1942 2.81 06/01/1943 2.08 06/11/1944 5.77 07/15/1945 3.76 10/04/1946 3.22 06/03/1947 2.61 08/14/1949 1.71 09/20/1950 2.16 06/18/1951 2.00 08/18/1952 1.82 04/29/1953 1.66 06/02/1954 2.39 06/09/1955 1.77 08/07/1956 2.43 07/01/1957 4.52 04/05/1958 2.07 05/28/1959 2.33 06/15/1960 2.62 06/13/1961 1.40 06/30/1962 2.75 09/19/1963 2.61 04/26/1964 3.00 07/06/1965 2.96 08/19/1966 2.55 09/17/1967 1.80 04/19/1968 2.90 09/04/1969 2.35 04/12/1970 2.52 08/29/1971 2.26 04/30/1972 3.05 05/27/1973 3.47 06/09/1974 4.31 06/16/1975 1.92 09/15/1976 1.36 03/11/1977 3.22 05/28/1978 1.50 10/30/1979 2.50 06/27/1980 2.58 07/02/1981 4.02 10/09/1982 2.95 06/12/1983 2.97 05/27/1984 2.46 08/12/1985 2.37 06/10/1986 3.12 03/17/1987 2.37 08/03/1988 3.80 07/14/1989 2.91 04/26/1990 2.55 05/16/1991 1.80 07/25/1992 3.34 06/17/1993 2.05 06/07/1994 2.48 04/17/1995 2.85 09/19/1996 4.80 10/12/1997 3.34 10/02/1998 5.60 05/05/1999 3.87 05/18/2000 1.88 04/22/2001 2.69 04/28/2002 1.49 09/21/2004 3.40 06/22/2005 3.98 09/22/2006 1.90 05/05/2007 3.52 06/03/2008 2.42 06/11/2010 3.29 Duration: 3 days 07/09/1909 3.30 07/17/1923 5.67 06/17/1924 2.17 06/13/1926 2.47 04/12/1927 2.82 06/11/1928 1.38 06/01/1929 2.64 08/16/1930 2.16 05/09/1931 2.64 06/08/1932 2.19 08/20/1933 2.50 09/09/1934 2.14 04/24/1935 1.96 04/28/1936 2.51 06/04/1937 2.45 04/25/1938 3.00 05/25/1939 2.67 06/03/1940 1.87 10/26/1941 2.97 05/11/1942 3.43 06/01/1943 2.10 06/10/1944 6.16 07/15/1945 3.80 10/05/1946 4.41 06/03/1947 3.26 08/14/1949 1.73 09/20/1950 2.18 08/12/1951 2.70 08/18/1952 1.84 04/29/1953 2.16 04/30/1954 3.13 06/09/1955 1.88 08/02/1956 2.46 07/01/1957 4.57 04/04/1958 2.57 05/28/1959 2.44 06/15/1960 2.65 06/13/1961 1.56 06/30/1962 2.78 09/19/1963 2.63 04/26/1964 3.16 07/06/1965 2.99 08/19/1966 2.57 09/17/1967 1.82 04/19/1968 2.93 09/04/1969 2.37 04/12/1970 2.54 08/29/1971 2.28 05/11/1972 3.61 05/26/1973 4.35 06/09/1974 4.35 06/17/1975 1.99 04/14/1976 1.37 03/11/1977 3.25 05/27/1978 1.65 10/30/1979 2.52 06/27/1980 2.61 07/02/1981 4.06 10/08/1982 3.30 06/12/1983 3.04 05/26/1984 2.56 09/02/1985 2.45 09/18/1986 3.25 03/23/1987 2.95 08/03/1988 3.84 07/14/1989 2.94 04/25/1990 2.97 05/16/1991 1.82 07/25/1992 3.37 08/16/1993 2.30 06/07/1994 2.58 04/16/1995 3.10 09/19/1996 4.85 10/12/1997 3.37 10/02/1998 5.65 05/05/1999 4.39 10/02/2000 1.90 04/21/2001 3.34 04/28/2002 1.50 09/21/2004 4.09 06/22/2005 4.67 09/22/2006 2.60 05/05/2007 3.55 08/12/2008 3.02 06/10/2010 4.69 Duration: 4 days 07/09/1909 3.33 07/14/1923 5.96 06/16/1924 2.59 06/12/1926 2.52 04/12/1927 3.28 06/11/1928 1.62 06/01/1929 2.74 08/16/1930 2.18 05/08/1931 2.81 06/16/1932 2.64 08/20/1933 2.53 09/09/1934 2.16 04/24/1935 2.00 04/28/1936 2.53 06/04/1937 2.48 04/25/1938 3.03 05/25/1939 2.70 06/03/1940 1.89 10/26/1941 3.00 05/10/1942 4.15 05/30/1943 2.28 06/10/1944 6.22 07/15/1945 3.83 10/04/1946 4.88 06/03/1947 3.29 08/15/1949 2.93 09/20/1950 2.20 08/12/1951 2.73 08/18/1952 1.86 04/29/1953 2.67 04/29/1954 3.91 05/23/1955 1.99 08/01/1956 2.49 07/01/1957 4.61 04/03/1958 2.79 05/28/1959 2.46 06/15/1960 2.67 06/10/1961 1.70 06/30/1962 2.80 09/19/1963 2.88 04/26/1964 3.19 07/06/1965 3.02 07/05/1966 2.60 09/15/1967 2.03 04/19/1968 3.90 09/04/1969 2.40 04/12/1970 2.62 08/29/1971 2.30 05/10/1972 3.81 05/25/1973 4.39 06/09/1974 4.39 06/14/1975 2.27 04/16/1976 1.45 09/28/1977 3.60 06/22/1978 2.13 10/30/1979 2.55 06/27/1980 2.64 07/02/1981 4.10 10/08/1982 3.33 06/12/1983 3.07 05/25/1984 2.71 09/02/1985 2.47 06/07/1986 4.18 03/22/1987 3.20 08/03/1988 3.87 07/14/1989 3.01 04/26/1990 3.70 05/25/1991 2.10 07/22/1992 4.05 08/16/1993 2.32 06/05/1994 2.93 04/16/1995 3.13 09/19/1996 4.89 10/09/1997 3.49 10/02/1998 5.71 05/04/1999 4.43 05/08/2000 2.35 04/21/2001 3.37 04/28/2002 2.01 09/21/2004 4.21 06/22/2005 4.72 09/22/2006 2.63 05/05/2007 3.59 06/03/2008 4.10 06/10/2010 5.34 Duration: 7 days 07/05/1909 3.45 07/11/1923 6.11 06/13/1924 3.21 06/11/1926 2.54 04/09/1927 3.84 06/11/1928 2.13 06/01/1929 3.82 06/18/1930 2.31 05/08/1931 2.84 06/13/1932 3.04 07/10/1933 2.55 09/09/1934 2.18 05/17/1935 2.14 04/28/1936 2.56 06/01/1937 2.53 04/27/1938 3.08 05/22/1939 4.55 06/03/1940 1.91 10/23/1941 3.03 04/30/1942 5.40 06/01/1943 2.37 06/07/1944 7.26 07/15/1945 3.87 10/04/1946 4.93 06/03/1947 4.23 08/14/1949 3.11 09/15/1950 2.53 06/18/1951 3.10 06/16/1952 2.29 04/29/1953 2.92 04/26/1954 4.25 05/23/1955 2.38 08/02/1956 4.89 07/01/1957 4.66 04/01/1958 2.91 05/26/1959 2.51 06/15/1960 3.17 06/10/1961 2.73 05/12/1962 3.44 09/19/1963 2.94 04/27/1964 4.29 09/15/1965 3.05 07/05/1966 2.63 06/10/1967 2.95 04/19/1968 3.94 08/30/1969 3.88 04/12/1970 3.14 08/24/1971 2.33 04/26/1972 4.54 05/24/1973 4.63 06/09/1974 4.44 06/16/1975 3.40 04/14/1976 1.76 09/28/1977 3.64 06/21/1978 2.28 10/30/1979 2.57 06/27/1980 2.76 06/28/1981 4.64 05/20/1982 3.96 06/26/1983 3.28 05/27/1984 2.96 08/12/1985 3.15 09/14/1986 6.45 03/17/1987 5.50 07/29/1988 3.91 07/14/1989 3.04 04/23/1990 4.32 05/25/1991 3.45 07/21/1992 4.55 06/18/1993 2.35 06/05/1994 3.35 09/30/1995 5.25 09/14/1996 4.95 10/09/1997 3.99 10/02/1998 5.77 05/05/1999 5.25 05/08/2000 2.37 04/07/2001 4.33 04/28/2002 2.44 09/20/2004 4.25 06/22/2005 4.76 09/19/2006 2.65 10/14/2007 3.89 06/02/2008 4.57 06/09/2010 6.55 Duration: 10 days 07/05/1909 3.48 07/10/1923 6.30 06/11/1924 3.49 06/08/1926 2.57 04/09/1927 4.31 06/11/1928 2.60 05/27/1929 4.86 10/03/1930 3.65 05/08/1931 2.87 06/08/1932 4.37 07/13/1933 2.64 06/06/1934 2.45 05/17/1935 2.57 04/28/1936 2.59 06/04/1937 3.68 04/25/1938 3.27 05/20/1939 4.60 06/03/1940 1.93 10/18/1941 3.50 05/04/1942 6.82 06/01/1943 2.58 06/03/1944 8.54 08/08/1945 3.91 09/28/1946 5.03 06/03/1947 5.03 08/09/1949 3.29 08/05/1950 2.71 08/12/1951 3.86 05/08/1952 2.52 04/24/1953 3.67 05/29/1954 4.42 06/03/1955 2.61 07/30/1956 5.18 06/27/1957 4.70 03/28/1958 3.06 05/21/1959 3.04 06/08/1960 3.36 06/07/1961 3.15 06/22/1962 4.62 06/06/1963 2.97 04/26/1964 5.55 06/29/1965 3.18 08/12/1966 4.37 06/07/1967 3.61 04/13/1968 4.48 08/30/1969 3.92 04/12/1970 3.29 08/30/1971 2.85 07/17/1972 5.72 05/24/1973 4.68 06/09/1974 4.48 06/14/1975 3.75 09/07/1976 2.36 09/28/1977 3.80 06/17/1978 2.83 10/22/1979 2.60 06/27/1980 3.46 06/28/1981 4.69 10/01/1982 4.96 06/12/1983 4.10 05/25/1984 3.41 08/08/1985 3.50 09/14/1986 6.95 03/17/1987 6.65 07/29/1988 3.95 07/07/1989 3.11 04/23/1990 4.36 05/22/1991 3.95 07/21/1992 4.70 06/17/1993 3.25 06/05/1994 3.38 04/10/1995 5.45 09/19/1996 6.30 10/09/1997 4.03 09/26/1998 5.90 05/05/1999 5.66 05/11/2000 2.93 04/03/2001 4.67 04/28/2002 2.46 09/15/2004 5.58 06/05/2005 5.96 09/19/2006 2.68 10/14/2007 4.02 06/02/2008 4.62 06/07/2010 6.68 Duration: 20 days 06/23/1909 4.48 07/10/1923 7.55 06/07/1924 5.29 09/02/1926 3.98 03/31/1927 6.37 06/05/1928 3.82 05/27/1929 6.46 04/23/1930 4.53 05/08/1931 3.00 05/31/1932 6.31 07/06/1933 3.82 07/23/1934 3.79 05/18/1935 3.86 04/28/1936 3.54 05/29/1937 4.61 04/15/1938 4.84 05/22/1939 5.38 03/09/1940 2.50 04/07/1941 4.22 04/24/1942 10.76 05/30/1943 4.09 05/25/1944 9.43 07/15/1945 4.86 06/17/1946 6.01 06/03/1947 6.83 08/10/1949 3.67 09/12/1950 4.24 06/14/1951 5.23 06/08/1952 3.72 04/24/1953 4.50 06/02/1954 6.02 05/23/1955 4.99 07/30/1956 6.30 06/15/1957 6.14 04/04/1958 4.70 05/12/1959 3.22 04/16/1960 4.71 06/01/1961 3.57 06/15/1962 7.86 07/08/1963 3.93 04/21/1964 7.12 09/13/1965 4.60 08/03/1966 4.73 05/30/1967 5.06 04/03/1968 6.58 06/28/1969 4.09 05/28/1970 4.75 08/19/1971 3.93 04/26/1972 8.67 05/24/1973 4.87 05/21/1974 5.16 06/04/1975 5.87 09/07/1976 2.83 09/12/1977 6.91 04/12/1978 3.82 10/12/1979 3.57 08/07/1980 3.95 06/14/1981 6.24 05/11/1982 7.72 06/12/1983 7.38 05/25/1984 5.46 08/24/1985 5.15 09/01/1986 7.90 03/17/1987 6.65 05/02/1988 5.15 06/26/1989 3.70 04/25/1990 5.92 05/16/1991 6.10 07/21/1992 6.10 06/17/1993 4.50 06/05/1994 4.75 04/10/1995 6.45 09/07/1996 7.95 10/09/1997 5.69 10/02/1998 7.87 06/15/1999 6.53 04/30/2000 4.40 04/07/2001 7.67 04/28/2002 3.70 09/14/2004 6.45 06/05/2005 10.63 06/03/2006 3.12 04/20/2007 5.97 05/22/2008 6.25 05/30/2010 9.71 Duration: 30 days 06/20/1909 4.90 07/10/1923 9.03 06/01/1924 5.91 08/21/1926 4.54 03/20/1927 6.67 05/30/1928 4.28 05/27/1929 6.76 04/14/1930 6.50 04/19/1931 3.74 05/21/1932 8.03 07/06/1933 4.21 07/23/1934 4.18 04/24/1935 4.66 04/28/1936 4.52 05/29/1937 5.37 04/05/1938 5.68 05/20/1939 6.71 06/03/1940 3.09 09/30/1941 5.98 04/24/1942 11.11 06/01/1943 4.19 05/20/1944 10.33 07/15/1945 6.22 09/06/1946 7.75 05/27/1947 8.30 08/14/1949 4.90 09/10/1950 4.54 06/14/1951 6.53 05/30/1952 4.34 05/30/1953 5.47 05/31/1954 7.82 05/23/1955 5.28 07/26/1956 6.41 06/06/1957 8.85 04/01/1958 5.44 05/04/1959 3.88 06/06/1960 5.49 06/07/1961 4.52 06/16/1962 10.43 07/04/1963 4.67 04/11/1964 7.71 05/14/1965 5.95 07/22/1966 6.38 05/30/1967 6.16 04/03/1968 6.64 06/22/1969 4.95 05/23/1970 5.62 06/28/1971 5.20 04/26/1972 9.69 05/24/1973 7.11 05/13/1974 5.78 05/23/1975 6.39 08/31/1976 2.86 09/12/1977 7.41 04/02/1978 5.02 05/30/1979 4.16 05/29/1980 5.70 06/28/1981 9.12 09/11/1982 8.04 06/12/1983 7.48 05/21/1984 5.97 08/08/1985 7.20 08/25/1986 8.60 02/24/1987 9.52 04/23/1988 7.79 06/17/1989 5.05 04/26/1990 8.80 05/16/1991 7.60 06/27/1992 7.42 06/01/1993 5.50 05/24/1994 5.43 04/10/1995 9.90 09/07/1996 7.95 10/09/1997 5.79 10/02/1998 9.76 04/08/1999 8.99 04/20/2000 5.18 04/07/2001 10.47 04/21/2002 4.05 09/05/2004 6.66 05/26/2005 12.91 08/28/2006 3.70 05/05/2007 7.05 05/22/2008 7.57 05/23/2010 12.56 Duration: 45 days 07/09/1909 6.52 07/10/1923 10.37 06/07/1924 7.18 08/21/1926 6.01 04/09/1927 8.99 05/14/1928 5.79 04/23/1929 8.74 04/14/1930 6.78 05/08/1931 4.96 05/06/1932 9.06 07/10/1933 5.84 08/07/1934 5.43 05/14/1935 6.61 04/28/1936 6.67 06/04/1937 7.39 04/27/1938 8.51 05/22/1939 7.27 06/03/1940 3.55 09/22/1941 7.03 04/24/1942 13.86 05/04/1943 4.89 05/02/1944 13.67 07/03/1945 9.66 08/24/1946 10.33 05/27/1947 8.83 07/08/1949 5.48 08/08/1950 6.11 05/29/1951 8.33 05/08/1952 6.66 04/25/1953 7.63 04/26/1954 10.08 05/18/1955 6.10 07/04/1956 7.13 05/18/1957 11.02 04/01/1958 7.45 05/20/1959 5.63 05/05/1960 7.86 05/03/1961 6.48 05/18/1962 13.42 06/14/1963 6.31 04/03/1964 9.11 05/23/1965 6.82 07/08/1966 8.46 05/16/1967 6.47 04/03/1968 7.78 06/11/1969 5.77 03/09/1970 6.23 06/05/1971 6.22 04/26/1972 11.92 05/26/1973 8.93 04/26/1974 6.93 05/10/1975 7.80 04/14/1976 3.69 08/25/1977 8.60 04/15/1978 6.52 05/07/1979 5.34 05/29/1980 6.88 06/14/1981 10.72 05/11/1982 10.45 06/12/1983 9.16 05/27/1984 6.99 07/30/1985 10.15 04/27/1986 9.95 02/24/1987 9.82 04/22/1988 8.59 06/11/1989 5.55 04/23/1990 11.37 04/27/1991 10.05 06/24/1992 9.17 06/17/1993 7.30 06/05/1994 8.00 03/26/1995 12.15 09/07/1996 9.05 09/13/1997 6.54 05/11/1998 10.77 04/03/1999 11.25 05/08/2000 6.33 03/31/2001 11.48 04/28/2002 5.35 05/12/2004 7.83 05/11/2005 15.67 08/12/2006 5.47 04/20/2007 9.50 04/25/2008 9.38 05/23/2010 14.54 Duration: 60 days 07/09/1909 7.85 05/20/1923 13.35 06/11/1924 9.64 08/08/1926 7.50 03/31/1927 11.47 05/14/1928 6.26 04/10/1929 10.09 04/11/1930 8.02 05/08/1931 6.46 04/22/1932 10.45 07/01/1933 7.07 07/23/1934 7.21 04/24/1935 8.16 04/09/1936 6.86 06/04/1937 9.19 04/05/1938 10.68 05/22/1939 9.77 06/03/1940 4.66 09/04/1941 7.93 04/24/1942 15.54 05/30/1943 5.87 04/14/1944 16.55 07/03/1945 10.47 08/22/1946 10.48 05/27/1947 9.54 08/14/1949 6.70 08/05/1950 8.21 05/14/1951 11.16 04/30/1952 7.71 04/29/1953 10.04 04/29/1954 13.04 04/24/1955 6.81 06/20/1956 7.52 05/09/1957 13.85 04/04/1958 8.54 05/20/1959 6.55 04/23/1960 9.66 05/03/1961 7.85 05/16/1962 17.16 06/01/1963 8.42 04/26/1964 11.80 05/08/1965 9.94 06/23/1966 9.81 05/23/1967 6.83 04/13/1968 8.51 07/07/1969 7.80 04/18/1970 7.84 05/23/1971 7.97 04/26/1972 14.76 05/26/1973 10.42 04/11/1974 8.76 04/28/1975 8.23 04/14/1976 4.04 02/23/1977 11.10 04/02/1978 7.92 05/30/1979 6.58 06/27/1980 8.50 06/21/1981 12.25 05/11/1982 12.72 04/30/1983 10.90 04/11/1984 9.49 07/16/1985 12.00 04/24/1986 11.85 02/24/1987 11.97 04/02/1988 9.44 07/14/1989 6.21 04/23/1990 12.87 04/12/1991 11.62 06/14/1992 10.92 05/27/1993 9.03 05/23/1994 8.79 04/10/1995 15.05 09/07/1996 10.33 06/03/1997 9.44 06/08/1998 15.34 05/05/1999 13.78 05/08/2000 8.36 04/07/2001 12.86 04/11/2002 5.77 05/12/2004 9.38 05/05/2005 16.33 08/01/2006 6.27 04/20/2007 11.23 04/25/2008 10.75 05/24/2010 17.52