Precipitation annual maximum series (inches) Station ID: 21-8947 Station name: WHITE ROCK DAM State: MN Latitude (decimal degrees): 45.8619 Longitude (decimal degrees): -96.5650 Elevation (feet): 1024 Duration: 15 minutes 07/25/1972 0.40 04/04/1973 0.90 08/25/1976 0.40 07/07/1978 0.80 07/13/1979 0.40 09/28/1980 1.00 06/13/1981 0.60 04/11/1984 1.00 09/02/1985 1.20 07/26/1986 0.50 08/12/1987 0.40 07/13/1988 0.60 08/23/1990 0.40 06/28/1991 0.90 08/06/1992 0.40 08/17/1993 0.70 07/18/1994 1.10 09/29/1995 0.70 05/17/1996 0.80 08/28/1997 0.70 06/26/1998 1.20 06/23/2003 0.80 07/11/2004 0.50 06/29/2005 1.30 08/24/2006 0.60 08/08/2007 0.60 08/11/2008 0.70 09/09/2009 0.70 06/17/2010 0.60 Duration: 30 minutes 05/21/1972 0.50 07/23/1973 1.10 08/25/1976 0.40 07/07/1978 1.40 06/19/1979 0.55 09/28/1980 1.90 06/13/1981 0.90 04/11/1984 1.10 09/02/1985 1.20 07/11/1986 0.70 07/09/1987 0.40 06/14/1988 0.80 09/07/1990 0.60 06/28/1991 1.40 06/15/1992 0.50 08/17/1993 1.10 07/18/1994 1.60 09/29/1995 1.00 05/17/1996 1.00 08/28/1997 0.90 06/26/1998 1.90 06/23/2003 0.90 07/01/2004 0.90 08/24/2006 1.10 05/23/2007 0.70 08/11/2008 1.20 09/09/2009 1.00 06/17/2010 0.70 Duration: 45 minutes 05/21/1972 0.70 07/23/1973 1.20 08/25/1976 0.50 07/07/1978 1.70 06/19/1979 0.82 09/28/1980 2.30 07/12/1981 1.30 04/11/1984 1.10 09/02/1985 1.20 07/11/1986 0.80 07/09/1987 0.40 08/11/1988 0.90 08/23/1990 0.70 06/20/1991 1.60 06/15/1992 0.70 08/17/1993 1.40 07/18/1994 1.90 09/29/1995 1.20 05/17/1996 1.00 08/28/1997 1.10 06/26/1998 2.30 06/23/2003 0.90 07/01/2004 1.00 08/24/2006 1.10 05/23/2007 0.90 08/11/2008 1.40 09/09/2009 1.40 07/04/2010 0.90 Duration: 1 hour 05/30/1949 1.03 07/08/1950 2.63 07/26/1951 0.92 07/02/1952 1.33 06/15/1953 0.65 06/07/1954 0.68 08/23/1955 1.30 06/29/1956 0.85 08/12/1957 2.22 07/03/1958 0.99 08/03/1959 0.87 08/23/1960 0.64 06/06/1961 1.52 05/15/1962 1.29 07/26/1963 1.90 07/09/1964 1.42 06/01/1965 0.90 07/31/1966 1.08 07/09/1967 1.40 05/31/1968 0.80 07/30/1969 1.50 07/12/1970 1.10 09/04/1971 1.00 05/21/1972 0.83 07/23/1973 1.10 08/25/1976 0.46 07/07/1978 1.65 06/19/1979 1.01 09/28/1980 2.29 07/12/1981 1.28 04/11/1984 1.10 09/02/1985 1.10 06/10/1986 0.83 07/09/1987 0.46 06/14/1988 0.83 08/23/1990 0.73 06/20/1991 1.65 06/15/1992 0.64 06/23/1993 1.38 07/18/1994 2.29 09/29/1995 1.19 05/17/1996 0.92 08/28/1997 1.01 06/26/1998 2.39 06/23/2003 0.92 07/01/2004 0.92 08/24/2006 1.01 05/23/2007 0.83 08/11/2008 1.38 09/09/2009 1.28 06/17/2010 1.01 Duration: 2 hours 07/08/1949 1.30 07/08/1950 3.52 07/26/1951 0.99 07/02/1952 1.51 06/15/1953 0.96 05/30/1954 0.96 07/10/1955 1.48 06/29/1956 1.50 08/12/1957 2.39 07/03/1958 1.20 07/03/1959 1.33 06/21/1960 1.00 06/06/1961 2.22 05/15/1962 1.45 07/26/1963 2.43 06/18/1964 1.74 06/01/1965 1.26 07/31/1966 1.96 07/09/1967 1.50 05/31/1968 1.40 07/30/1969 1.70 07/12/1970 1.80 06/19/1971 1.10 05/21/1972 1.35 07/23/1973 1.25 08/25/1976 0.48 07/07/1978 2.02 06/19/1979 1.73 09/28/1980 3.37 07/12/1981 1.35 10/14/1984 1.63 09/02/1985 1.15 06/10/1986 1.06 07/05/1987 0.58 08/01/1988 1.25 08/23/1990 1.15 06/20/1991 2.31 06/15/1992 0.87 08/17/1993 1.45 07/18/1994 3.46 09/29/1995 1.35 05/17/1996 0.96 08/19/1997 1.06 06/26/1998 2.60 06/23/2003 0.96 07/11/2004 1.63 09/02/2006 1.44 05/23/2007 1.06 08/11/2008 1.45 09/09/2009 1.73 07/04/2010 1.25 Duration: 3 hours 07/08/1949 1.45 07/08/1950 5.10 06/02/1951 1.14 07/02/1952 1.56 06/19/1953 1.09 05/30/1954 1.30 07/10/1955 1.85 06/29/1956 1.63 08/12/1957 2.44 07/03/1958 1.35 07/03/1959 1.94 06/21/1960 1.54 06/06/1961 2.26 05/15/1962 1.57 07/26/1963 2.63 08/20/1964 1.83 06/01/1965 1.53 07/31/1966 2.61 07/09/1967 1.53 05/31/1968 1.60 07/30/1969 1.80 07/12/1970 1.84 06/19/1971 1.20 05/21/1972 1.90 07/01/1973 1.30 09/07/1976 0.70 07/07/1978 2.40 06/19/1979 1.90 09/28/1980 3.60 06/13/1981 1.40 06/07/1984 2.00 07/24/1985 1.20 06/10/1986 1.50 09/05/1987 0.60 08/01/1988 1.40 08/23/1990 1.20 06/20/1991 2.40 06/15/1992 1.10 07/24/1993 1.50 07/18/1994 3.80 09/29/1995 1.70 09/06/1996 1.10 08/19/1997 1.20 06/26/1998 2.70 06/23/2003 1.00 07/11/2004 1.70 09/02/2006 1.80 05/05/2007 1.10 08/11/2008 2.10 09/09/2009 1.80 07/04/2010 1.30 Duration: 6 hours 07/08/1949 2.27 07/08/1950 5.44 06/01/1951 1.30 07/02/1952 1.61 06/19/1953 1.58 05/30/1954 1.67 07/10/1955 2.48 06/29/1956 1.65 08/12/1957 2.46 07/03/1958 1.40 07/03/1959 2.57 06/21/1960 1.72 06/06/1961 2.29 05/15/1962 2.00 07/26/1963 2.80 08/20/1964 2.10 06/01/1965 2.31 07/31/1966 2.64 07/09/1967 1.55 05/31/1968 2.00 07/30/1969 1.82 07/12/1970 1.86 06/19/1971 1.21 05/21/1972 2.10 05/24/1973 1.70 06/24/1976 0.90 07/07/1978 3.00 06/19/1979 1.92 09/28/1980 3.70 06/13/1981 1.70 06/07/1984 2.30 07/24/1985 1.50 06/10/1986 2.10 09/05/1987 0.90 08/01/1988 1.70 06/15/1990 1.80 06/20/1991 2.80 06/15/1992 1.30 07/24/1993 1.80 07/18/1994 4.80 09/29/1995 2.80 10/29/1996 1.20 04/05/1997 1.40 06/26/1998 2.73 06/23/2003 1.01 07/11/2004 1.80 09/02/2006 2.30 05/05/2007 1.90 08/11/2008 2.40 09/08/2009 2.00 07/04/2010 1.40 Duration: 12 hours 07/08/1949 2.43 07/08/1950 6.03 06/01/1951 1.50 07/02/1952 1.63 06/19/1953 2.07 09/08/1954 1.97 07/10/1955 2.50 08/02/1956 1.94 08/12/1957 2.49 07/03/1958 1.71 07/03/1959 2.60 06/21/1960 1.80 06/06/1961 2.31 05/15/1962 2.34 07/26/1963 2.95 08/20/1964 2.59 06/01/1965 2.39 08/20/1966 2.88 07/09/1967 1.56 05/31/1968 2.02 07/30/1969 1.84 07/12/1970 2.10 06/29/1971 1.60 05/20/1972 2.20 05/24/1973 2.50 06/24/1976 1.10 07/06/1978 3.10 06/19/1979 2.00 09/28/1980 3.74 06/13/1981 1.90 10/14/1984 2.50 07/24/1985 1.52 06/10/1986 2.40 09/05/1987 1.10 08/01/1988 2.10 06/15/1990 2.10 06/19/1991 3.70 06/15/1992 1.40 07/24/1993 1.90 07/18/1994 4.85 09/29/1995 3.30 10/29/1996 1.40 04/05/1997 2.30 06/26/1998 2.76 06/23/2003 1.02 07/11/2004 1.82 09/01/2006 2.60 05/05/2007 2.00 08/11/2008 2.60 09/08/2009 2.02 07/04/2010 1.41 Duration: 1 day 07/08/1949 2.19 07/08/1950 5.38 06/02/1951 1.68 07/02/1952 1.53 06/19/1953 2.12 09/08/1954 1.82 07/11/1955 2.34 08/03/1956 2.99 08/12/1957 2.28 07/03/1958 1.73 05/30/1959 2.32 06/21/1960 2.17 06/06/1961 2.07 06/09/1962 2.10 07/26/1963 3.27 08/20/1964 2.54 06/01/1965 2.38 08/20/1966 2.80 07/09/1967 1.39 04/22/1968 1.88 07/30/1969 1.64 07/12/1970 2.59 06/29/1971 1.96 05/21/1972 1.96 05/24/1973 2.59 06/24/1976 0.98 07/07/1978 2.86 06/19/1979 2.68 09/28/1980 3.34 06/13/1981 1.70 10/14/1984 3.21 07/24/1985 1.36 06/10/1986 2.41 09/05/1987 1.07 08/01/1988 1.88 07/08/1989 2.60 06/15/1990 2.05 06/20/1991 3.75 06/15/1992 1.61 07/24/1993 1.79 07/18/1994 4.33 09/29/1995 3.93 10/29/1996 1.52 04/05/1997 2.32 06/26/1998 2.46 06/22/2003 1.79 09/02/2006 2.95 05/05/2007 2.50 08/11/2008 2.68 09/09/2009 1.88 07/04/2010 1.34 Duration: 2 days 07/05/1949 2.56 07/07/1950 6.09 06/01/1951 2.64 07/02/1952 1.65 06/19/1953 2.28 09/08/1954 1.96 07/10/1955 2.81 08/02/1956 4.28 05/13/1957 2.62 07/03/1958 1.88 07/03/1959 2.50 06/20/1960 3.20 06/06/1961 2.23 05/15/1962 3.31 07/26/1963 3.62 08/20/1964 2.74 06/01/1965 2.57 08/19/1966 3.27 07/09/1967 2.40 10/16/1968 2.60 04/08/1969 2.12 07/12/1970 2.79 06/28/1971 2.12 05/21/1972 2.31 05/23/1973 2.79 06/24/1976 1.25 07/06/1978 3.08 06/19/1979 2.89 09/28/1980 3.60 06/13/1981 1.92 10/14/1984 3.85 07/24/1985 1.46 06/10/1986 2.60 09/04/1987 1.15 08/01/1988 2.21 06/15/1990 2.31 06/19/1991 4.33 06/15/1992 2.40 06/22/1993 2.21 07/18/1994 4.90 09/29/1995 4.33 10/16/1996 1.64 04/05/1997 2.60 06/25/1998 3.27 06/22/2003 2.79 09/01/2006 3.94 06/01/2007 2.69 08/11/2008 2.89 09/08/2009 2.02 09/09/2010 1.73 Duration: 3 days 07/06/1949 3.62 07/07/1950 6.33 05/31/1951 2.86 07/02/1952 1.71 06/19/1953 2.37 09/06/1954 2.18 07/10/1955 3.18 08/02/1956 4.45 08/12/1957 2.72 07/03/1958 1.95 07/03/1959 2.60 06/19/1960 3.33 06/06/1961 2.80 06/07/1962 3.60 07/26/1963 3.76 08/19/1964 2.88 06/01/1965 2.72 08/19/1966 3.42 07/09/1967 2.50 10/16/1968 2.80 10/03/1969 2.30 07/12/1970 3.00 06/27/1971 2.30 05/20/1972 2.40 05/23/1973 2.90 06/24/1976 1.30 07/06/1978 3.20 06/19/1979 3.00 09/28/1980 3.70 06/13/1981 2.10 10/14/1984 4.20 07/24/1985 1.50 06/10/1986 2.70 09/04/1987 1.20 08/11/1988 2.30 06/15/1990 2.50 06/19/1991 4.50 06/15/1992 2.80 06/22/1993 2.30 07/18/1994 5.10 09/29/1995 4.50 10/16/1996 1.70 04/04/1997 2.70 10/15/1998 3.40 06/22/2003 3.80 09/01/2006 4.10 06/01/2007 2.90 08/09/2008 3.10 09/08/2009 2.20 10/25/2010 1.80 Duration: 4 days 07/05/1949 4.99 07/08/1950 7.70 05/30/1951 3.46 07/02/1952 1.73 06/19/1953 2.42 09/06/1954 2.36 07/08/1955 3.44 08/02/1956 5.11 08/30/1957 3.24 07/03/1958 1.97 07/03/1959 2.63 06/20/1960 3.71 06/06/1961 2.83 05/15/1962 4.42 06/06/1963 4.25 08/18/1964 2.91 06/01/1965 2.75 08/19/1966 3.45 07/07/1967 2.80 10/16/1968 2.83 10/03/1969 2.32 07/12/1970 3.03 06/27/1971 2.32 05/20/1972 2.50 05/21/1973 3.30 06/24/1976 1.31 07/06/1978 3.30 06/16/1979 4.10 09/28/1980 3.74 06/13/1981 2.12 06/04/1984 4.80 07/24/1985 1.70 06/07/1986 2.90 09/16/1987 1.30 08/10/1988 2.40 06/15/1990 2.52 06/19/1991 4.54 06/15/1992 3.00 06/22/1993 2.32 07/18/1994 5.20 09/29/1995 4.54 05/14/1996 2.50 04/04/1997 2.80 10/15/1998 3.43 06/22/2003 3.84 09/01/2006 4.20 06/01/2007 2.93 08/09/2008 3.13 09/08/2009 2.40 09/06/2010 2.80 Duration: 7 days 07/05/1949 5.08 07/07/1950 8.08 05/30/1951 3.49 06/27/1952 3.04 06/14/1953 4.45 09/08/1954 3.93 07/07/1955 4.64 08/02/1956 6.25 05/14/1957 3.89 07/03/1958 2.08 07/03/1959 2.84 06/20/1960 3.95 06/06/1961 3.66 05/15/1962 6.03 06/03/1963 5.60 06/16/1964 3.91 06/01/1965 5.29 08/14/1966 3.84 07/07/1967 2.83 10/16/1968 2.86 10/03/1969 2.35 07/12/1970 3.06 08/29/1971 3.30 07/20/1972 3.70 05/21/1973 3.33 06/24/1976 1.80 06/24/1978 3.40 06/16/1979 4.14 09/28/1980 3.78 06/13/1981 2.30 10/14/1984 6.80 09/02/1985 2.50 06/04/1986 3.80 07/04/1987 2.00 08/10/1988 2.42 06/15/1990 3.10 06/14/1991 6.10 06/15/1992 3.10 06/19/1993 2.60 07/18/1994 5.25 09/29/1995 5.40 05/14/1996 2.60 04/04/1997 2.83 10/11/1998 3.70 06/22/2003 4.00 09/01/2006 4.24 05/28/2007 3.00 08/09/2008 3.16 10/01/2009 2.90 09/06/2010 3.10 Duration: 10 days 07/05/1949 5.28 07/07/1950 8.38 05/24/1951 3.57 06/24/1952 3.13 06/15/1953 5.21 09/06/1954 4.37 07/03/1955 6.04 07/30/1956 6.72 05/13/1957 5.39 07/03/1958 2.93 06/26/1959 4.28 06/19/1960 4.45 06/06/1961 3.70 05/14/1962 8.12 05/31/1963 7.76 04/12/1964 4.23 05/29/1965 5.44 08/12/1966 5.06 06/06/1967 3.40 05/31/1968 3.50 10/03/1969 2.50 07/12/1970 3.09 08/29/1971 3.50 07/19/1972 4.10 05/21/1973 3.37 06/24/1976 1.82 06/28/1978 5.70 06/16/1979 4.18 09/28/1980 3.81 06/13/1981 2.70 10/14/1984 6.87 09/02/1985 2.60 06/03/1986 4.10 07/04/1987 2.10 05/18/1988 2.50 06/11/1990 3.20 06/19/1991 6.20 06/15/1992 3.40 06/15/1993 3.50 07/18/1994 5.40 09/29/1995 5.90 05/08/1996 2.90 04/04/1997 2.86 06/26/1998 3.80 06/16/2003 4.60 08/24/2006 5.80 03/25/2007 3.60 08/09/2008 3.19 10/01/2009 2.93 09/01/2010 3.90 Duration: 20 days 06/19/1949 7.31 06/22/1950 9.80 05/31/1951 4.89 06/15/1952 3.94 06/07/1953 6.98 09/03/1954 4.66 06/23/1955 7.12 07/27/1956 7.81 05/07/1957 6.74 06/23/1958 3.84 06/17/1959 4.90 06/09/1960 6.13 06/06/1961 4.24 05/09/1962 9.33 05/23/1963 9.53 08/20/1964 6.12 05/19/1965 7.88 08/07/1966 5.95 06/22/1967 4.50 05/25/1968 4.90 04/08/1969 3.00 07/12/1970 4.90 06/19/1971 4.50 07/11/1972 5.10 05/09/1973 3.50 06/24/1976 2.30 06/22/1978 7.20 06/09/1979 4.90 09/28/1980 4.30 05/27/1981 3.70 10/01/1984 7.60 07/24/1985 3.80 04/13/1986 4.70 07/04/1987 3.10 08/01/1988 4.80 06/11/1990 4.20 06/14/1991 9.38 06/15/1992 4.70 07/07/1993 5.00 07/03/1994 8.90 09/29/1995 6.00 10/16/1996 4.10 08/14/1997 3.90 06/18/1998 4.80 06/06/2003 6.40 08/15/2006 6.90 05/19/2007 5.50 10/05/2008 4.20 10/01/2009 4.10 08/30/2010 5.70 Duration: 30 days 06/15/1949 7.75 06/15/1950 10.99 05/30/1951 5.93 06/21/1952 4.53 05/28/1953 8.07 08/15/1954 5.58 06/18/1955 7.92 07/23/1956 7.87 05/13/1957 8.38 06/16/1958 4.62 06/08/1959 5.82 05/25/1960 6.96 06/01/1961 5.75 05/11/1962 13.02 05/12/1963 11.54 06/14/1964 7.62 05/09/1965 9.36 07/23/1966 8.93 06/12/1967 6.40 05/25/1968 5.30 04/07/1969 4.00 06/15/1970 5.30 05/31/1971 5.90 07/11/1972 5.60 06/30/1973 4.30 05/26/1976 2.50 06/15/1978 8.19 06/16/1979 5.50 05/29/1980 4.50 06/13/1981 5.20 09/23/1984 8.10 08/12/1985 4.60 04/13/1986 6.40 07/04/1987 3.10 07/23/1988 5.00 08/23/1990 5.10 06/14/1991 11.20 06/15/1992 6.00 06/19/1993 6.80 06/20/1994 9.90 09/29/1995 7.30 05/04/1996 4.40 08/05/1997 4.90 06/10/1998 5.90 06/06/2003 7.40 08/05/2006 8.40 05/04/2007 8.10 09/14/2008 5.10 10/01/2009 6.30 08/30/2010 7.30 Duration: 45 days 05/30/1949 9.52 06/08/1950 11.67 05/13/1951 7.03 05/20/1952 5.31 05/10/1953 9.59 08/07/1954 5.93 06/23/1955 10.29 06/25/1956 10.82 05/13/1957 11.25 05/30/1958 7.36 05/21/1959 8.62 05/19/1960 8.76 05/05/1961 7.80 05/09/1962 14.85 04/26/1963 12.63 06/09/1964 8.32 05/05/1965 9.80 07/22/1966 9.64 06/04/1967 8.20 04/20/1968 7.40 04/07/1969 4.50 06/15/1970 6.90 05/23/1971 7.30 06/18/1972 6.60 07/22/1973 5.60 05/26/1976 3.40 05/25/1978 9.50 06/16/1979 8.50 08/16/1980 5.70 06/08/1981 6.40 09/07/1984 8.60 07/20/1985 5.80 03/31/1986 7.70 07/04/1987 4.30 07/01/1988 6.20 06/01/1990 6.00 05/28/1991 14.30 06/03/1992 6.90 06/15/1993 9.90 06/16/1994 10.80 08/24/1995 7.70 09/18/1996 6.10 07/20/1997 6.50 06/10/1998 6.80 06/06/2003 8.00 08/10/2006 9.70 05/05/2007 9.70 08/11/2008 6.80 09/08/2009 7.80 08/10/2010 9.70 Duration: 60 days 05/30/1949 11.18 06/15/1950 13.12 05/30/1951 8.20 05/20/1952 5.93 04/24/1953 12.48 07/22/1954 8.02 06/28/1955 12.03 06/14/1956 12.60 04/18/1957 12.52 05/24/1958 7.60 05/20/1959 9.25 05/18/1960 9.33 04/14/1961 9.88 05/09/1962 18.35 05/31/1963 13.41 06/08/1964 10.00 05/14/1965 12.17 06/22/1966 10.75 06/04/1967 8.70 04/20/1968 9.70 03/19/1969 4.90 05/31/1970 8.00 05/23/1971 8.10 06/18/1972 7.10 03/31/1973 5.80 05/26/1976 3.80 05/19/1978 10.50 06/09/1979 9.00 08/01/1980 6.00 05/22/1981 8.20 04/10/1984 9.80 07/20/1985 8.00 04/13/1986 11.10 07/23/1987 4.80 08/01/1988 8.50 05/13/1990 7.20 05/29/1991 14.90 05/16/1992 8.10 05/27/1993 12.20 06/28/1994 11.70 08/11/1995 9.20 09/02/1996 7.70 07/01/1997 7.80 05/07/1998 9.80 05/08/2003 9.40 05/21/2005 13.70 08/05/2006 10.60 04/21/2007 11.50 08/27/2008 8.00 09/03/2009 9.60 07/28/2010 10.60