Precipitation annual maximum series (inches) Station ID: 23-0127 Station name: ALTON 6 SE State: MO Latitude (decimal degrees): 36.6300 Longitude (decimal degrees): -91.3042 Elevation (feet): 810 Duration: 1 hour 08/27/1949 1.45 05/26/1950 1.00 09/12/1951 1.39 07/14/1952 1.28 06/28/1953 0.87 10/02/1954 1.05 11/02/1955 1.26 11/15/1956 0.91 07/15/1957 1.00 07/11/1958 1.33 11/03/1959 0.87 05/06/1960 1.02 07/26/1961 1.35 09/14/1962 1.40 09/11/1963 1.68 08/26/1964 1.41 09/22/1965 1.67 04/23/1966 1.16 09/07/1967 0.96 07/22/1968 1.37 04/09/1969 0.60 04/23/1970 1.73 06/08/1971 1.46 09/26/1972 1.62 05/26/1973 1.60 06/07/1974 0.75 09/10/1975 1.33 06/23/1976 1.19 07/11/1977 1.47 07/09/1978 0.85 07/26/1980 0.66 Duration: 2 hours 08/27/1949 1.60 06/20/1950 1.40 09/12/1951 1.49 07/14/1952 1.34 06/28/1953 1.10 05/02/1954 1.30 04/20/1955 1.99 05/15/1956 1.23 09/01/1957 1.50 11/16/1958 1.70 10/04/1959 1.26 05/06/1960 1.24 05/07/1961 1.76 09/14/1962 2.51 09/11/1963 1.76 06/17/1964 2.11 09/22/1965 1.98 04/23/1966 1.62 09/07/1967 1.43 07/22/1968 1.50 01/29/1969 0.91 04/23/1970 1.89 06/08/1971 1.60 09/26/1972 1.82 05/26/1973 2.13 06/09/1974 1.10 09/10/1975 2.22 06/23/1976 2.05 08/12/1977 1.57 07/09/1978 0.93 07/26/1980 1.07 Duration: 3 hours 08/27/1949 1.63 06/20/1950 1.49 09/12/1951 1.69 07/14/1952 1.37 06/28/1953 1.44 05/02/1954 1.60 04/20/1955 2.03 05/15/1956 1.33 09/01/1957 1.98 11/16/1958 2.00 10/04/1959 1.52 05/06/1960 1.39 05/07/1961 2.74 09/14/1962 2.56 09/11/1963 1.80 06/17/1964 2.60 09/22/1965 2.13 04/23/1966 1.91 09/07/1967 1.66 07/22/1968 1.53 01/29/1969 1.08 04/23/1970 1.98 06/08/1971 1.63 09/26/1972 1.99 05/26/1973 3.29 06/09/1974 1.50 09/10/1975 2.61 06/23/1976 2.36 08/12/1977 1.78 11/25/1978 1.06 07/26/1980 1.36 Duration: 6 hours 08/27/1949 1.65 06/03/1950 1.96 09/12/1951 2.09 07/14/1952 1.57 06/28/1953 1.45 05/02/1954 2.10 04/20/1955 2.05 05/15/1956 1.45 11/07/1957 2.56 11/16/1958 2.90 10/04/1959 1.98 05/06/1960 1.47 05/07/1961 3.13 09/14/1962 2.59 11/22/1963 2.18 06/17/1964 2.63 09/21/1965 2.73 04/23/1966 2.22 10/17/1967 1.97 04/19/1968 1.65 01/29/1969 1.90 08/09/1970 2.74 12/09/1971 2.01 09/26/1972 2.04 05/26/1973 4.40 05/21/1974 1.76 09/10/1975 3.68 06/23/1976 2.64 08/12/1977 2.31 11/25/1978 1.35 07/26/1980 1.39 Duration: 12 hours 01/24/1949 2.35 05/10/1950 2.76 01/02/1951 2.45 07/14/1952 2.10 04/17/1953 1.49 05/01/1954 2.32 04/20/1955 2.60 02/01/1956 2.09 11/07/1957 3.30 11/16/1958 4.17 10/04/1959 2.15 06/27/1960 1.84 05/07/1961 3.60 09/14/1962 2.61 11/22/1963 3.64 06/17/1964 3.10 09/21/1965 3.09 04/22/1966 3.09 10/17/1967 2.55 12/27/1968 1.90 01/29/1969 3.05 08/09/1970 2.94 12/09/1971 2.88 09/26/1972 2.29 05/26/1973 4.44 02/21/1974 2.02 09/10/1975 4.07 06/23/1976 3.06 03/27/1977 2.86 11/25/1978 1.82 07/26/1980 1.40 Duration: 1 day 11/11/1940 2.16 10/31/1941 2.81 02/14/1949 2.77 05/12/1950 4.60 10/24/1951 2.80 03/10/1952 2.77 04/18/1953 1.60 05/02/1954 2.07 05/21/1955 2.79 02/02/1956 2.51 11/08/1957 4.04 11/17/1958 4.77 10/05/1959 2.03 05/19/1960 2.36 05/07/1961 3.29 09/15/1962 2.33 11/22/1963 4.35 06/18/1964 3.18 09/22/1965 3.48 01/01/1966 3.46 05/13/1967 2.44 11/27/1968 2.45 01/30/1969 3.62 08/09/1970 3.72 12/10/1971 3.00 07/28/1972 2.60 05/27/1973 4.57 05/22/1974 2.98 09/11/1975 4.05 06/24/1976 3.21 03/28/1977 4.63 11/26/1978 2.66 05/21/1979 3.03 08/16/1981 1.90 12/03/1982 8.35 12/18/1995 2.08 09/16/1996 3.82 04/05/1997 4.26 10/06/1998 2.40 10/17/1999 2.55 06/18/2000 3.67 12/17/2001 2.06 07/19/2002 3.35 11/18/2003 3.90 04/23/2004 2.58 09/15/2005 2.10 09/23/2006 4.77 02/13/2007 3.71 03/19/2008 6.12 10/30/2009 3.72 07/19/2010 2.97 Duration: 2 days 11/25/1940 3.25 10/30/1941 3.04 02/14/1949 4.11 05/11/1950 5.50 10/23/1951 3.30 03/10/1952 3.75 04/18/1953 1.72 05/01/1954 2.55 04/20/1955 3.00 02/01/1956 3.14 04/03/1957 5.06 11/17/1958 5.33 10/04/1959 3.00 05/19/1960 2.92 05/06/1961 5.38 09/15/1962 3.56 11/22/1963 5.55 03/09/1964 5.52 09/22/1965 3.88 01/01/1966 5.36 09/08/1967 3.96 11/27/1968 3.14 01/29/1969 3.90 08/09/1970 4.40 12/09/1971 4.36 07/28/1972 4.01 11/23/1973 5.82 05/22/1974 3.21 09/11/1975 6.72 06/24/1976 3.76 03/27/1977 6.28 11/26/1978 2.87 05/21/1979 3.26 08/16/1981 2.05 12/03/1982 12.13 12/18/1995 2.81 09/16/1996 4.11 04/05/1997 4.74 01/04/1998 2.87 10/17/1999 2.75 06/17/2000 4.51 12/16/2001 3.58 07/19/2002 3.61 11/18/2003 4.43 04/23/2004 3.90 09/14/2005 3.03 09/23/2006 5.82 02/13/2007 4.00 03/18/2008 8.13 10/30/2009 4.01 07/19/2010 3.20 04/25/2011 6.64 Duration: 3 days 11/25/1940 3.28 10/30/1941 3.07 01/17/1949 4.15 05/10/1950 8.00 11/23/1951 3.50 07/14/1952 4.00 03/01/1953 1.95 12/27/1954 3.25 04/20/1955 3.03 02/01/1956 3.17 04/02/1957 5.61 11/15/1958 8.71 10/03/1959 3.43 05/19/1960 3.25 05/05/1961 5.64 09/15/1962 3.70 11/22/1963 5.60 03/08/1964 6.97 09/21/1965 3.96 01/01/1966 5.41 05/12/1967 4.14 11/01/1968 4.42 01/28/1969 3.94 08/08/1970 4.58 12/09/1971 4.40 10/31/1972 4.80 11/23/1973 6.51 06/07/1974 4.15 09/10/1975 6.90 06/24/1976 3.80 03/27/1977 6.36 11/26/1978 2.90 02/23/1979 3.50 08/16/1981 2.07 12/03/1982 12.91 04/30/1995 2.88 09/16/1996 4.15 04/05/1997 4.79 07/23/1998 3.24 12/10/1999 2.98 06/17/2000 4.56 12/16/2001 3.61 07/19/2002 3.65 11/18/2003 4.47 04/23/2004 5.00 09/14/2005 3.48 09/23/2006 5.88 02/13/2007 4.04 03/18/2008 8.50 10/30/2009 4.05 07/19/2010 3.23 04/24/2011 9.73 Duration: 4 days 08/09/1940 3.40 10/15/1941 3.56 01/22/1949 4.19 05/09/1950 9.20 11/23/1951 3.53 07/14/1952 4.04 03/01/1953 1.97 12/27/1954 3.28 03/18/1955 3.45 01/30/1956 3.36 04/02/1957 5.86 11/15/1958 9.27 10/03/1959 3.53 05/19/1960 3.28 05/06/1961 5.98 09/15/1962 3.74 11/20/1963 5.83 03/08/1964 7.04 09/21/1965 4.00 01/01/1966 5.47 05/12/1967 4.82 11/01/1968 4.46 01/27/1969 3.98 08/07/1970 4.80 12/07/1971 5.70 10/31/1972 4.85 11/23/1973 7.62 06/07/1974 4.19 09/10/1975 6.97 06/24/1976 3.84 03/27/1977 6.42 11/14/1978 2.93 02/22/1979 4.00 08/16/1981 2.09 12/02/1982 13.16 12/16/1995 3.53 09/13/1996 4.19 04/05/1997 4.84 07/23/1998 3.79 12/10/1999 3.30 06/15/2000 4.96 12/14/2001 4.13 07/19/2002 3.68 11/15/2003 4.63 04/22/2004 5.45 09/14/2005 3.51 09/23/2006 5.94 02/13/2007 4.08 03/18/2008 8.58 05/06/2009 4.09 07/16/2010 3.26 04/24/2011 10.69 Duration: 7 days 08/07/1940 3.70 10/31/1941 4.02 01/22/1949 5.80 05/06/1950 9.50 10/23/1951 4.20 07/14/1952 4.08 05/11/1953 2.65 12/27/1954 3.32 04/20/1955 3.70 01/28/1956 3.64 04/02/1957 6.56 11/14/1958 9.55 09/29/1959 3.98 12/06/1960 3.56 05/05/1961 6.82 09/15/1962 3.78 11/18/1963 6.01 03/04/1964 7.77 09/21/1965 4.42 01/01/1966 5.92 05/12/1967 4.87 11/01/1968 4.51 01/27/1969 4.02 10/08/1970 7.12 12/06/1971 6.10 09/24/1972 5.45 11/20/1973 8.67 06/05/1974 4.86 09/06/1975 7.77 06/18/1976 4.16 08/13/1977 6.70 07/10/1978 3.76 02/22/1979 4.52 05/10/1981 2.47 11/28/1982 13.29 06/29/1995 4.04 09/16/1996 4.24 04/05/1997 4.88 07/23/1998 4.75 12/10/1999 3.33 06/15/2000 6.05 12/12/2001 4.79 07/13/2002 4.91 11/13/2003 5.23 04/20/2004 5.75 09/14/2005 3.58 09/18/2006 6.84 12/10/2007 4.77 03/14/2008 9.03 05/09/2009 4.85 11/24/2010 3.42 04/22/2011 12.73 Duration: 10 days 04/11/1940 4.90 10/26/1941 4.61 01/18/1949 8.10 05/09/1950 10.50 06/03/1951 4.55 07/08/1952 4.50 03/14/1953 3.20 12/27/1954 3.35 05/12/1955 4.94 02/01/1956 4.06 03/31/1957 6.69 11/14/1958 9.65 09/26/1959 5.19 12/05/1960 3.76 05/01/1961 7.74 09/09/1962 4.07 11/18/1963 6.07 03/04/1964 7.85 09/21/1965 4.46 04/19/1966 6.04 09/08/1967 4.96 09/16/1968 5.57 01/23/1969 4.98 10/07/1970 7.22 12/06/1971 7.40 09/22/1972 6.56 11/19/1973 9.15 06/05/1974 4.96 09/10/1975 9.63 06/16/1976 5.74 08/09/1977 7.53 07/10/1978 3.80 02/22/1979 6.42 05/10/1981 3.31 11/27/1982 15.79 04/30/1995 4.59 09/16/1996 4.76 04/05/1997 5.22 07/23/1998 6.42 10/08/1999 4.86 06/15/2000 6.16 12/08/2001 5.37 05/08/2002 6.88 11/15/2003 5.75 04/22/2004 6.29 08/14/2005 3.62 09/18/2006 6.91 12/07/2007 5.01 03/14/2008 9.12 09/15/2009 5.49 04/24/2010 3.80 04/24/2011 17.48 Duration: 20 days 04/11/1940 6.18 10/16/1941 7.55 06/04/1946 14.66 01/16/1949 9.50 05/10/1950 13.05 06/22/1951 7.20 03/03/1952 5.80 03/01/1953 4.55 12/11/1954 4.95 05/11/1955 6.44 01/30/1956 6.83 04/03/1957 8.39 11/14/1958 10.61 09/26/1959 6.30 05/05/1960 6.32 05/01/1961 8.83 08/30/1962 6.62 11/04/1963 6.54 03/04/1964 8.82 09/05/1965 6.65 04/08/1966 8.22 09/08/1967 6.47 09/09/1968 6.67 01/16/1969 6.91 10/08/1970 9.45 11/26/1971 8.21 10/31/1972 8.95 11/18/1973 11.50 05/22/1974 8.96 09/06/1975 10.65 06/16/1976 7.72 08/10/1977 9.48 11/14/1978 6.96 03/27/1979 7.40 05/19/1981 4.72 11/23/1982 17.42 06/29/1995 6.24 09/09/1996 8.02 04/05/1997 5.67 07/23/1998 7.79 09/29/1999 5.21 06/15/2000 6.96 11/28/2001 8.28 03/09/2002 8.29 11/15/2003 7.40 04/20/2004 7.01 09/14/2005 6.04 04/21/2006 7.91 12/03/2007 6.75 03/18/2008 15.06 04/28/2009 7.94 05/01/2010 6.08 04/15/2011 19.93 Duration: 30 days 04/03/1940 7.31 10/02/1941 9.19 06/01/1946 18.01 01/16/1949 12.63 05/06/1950 17.90 06/03/1951 9.45 03/10/1952 6.30 04/18/1953 5.60 12/05/1954 6.30 05/11/1955 6.79 01/28/1956 7.38 04/01/1957 14.08 11/01/1958 10.79 09/26/1959 6.35 04/21/1960 7.24 05/01/1961 9.87 09/15/1962 7.72 05/20/1963 7.59 03/08/1964 11.25 08/25/1965 8.30 04/19/1966 10.90 09/08/1967 6.55 11/01/1968 9.87 03/23/1969 7.62 09/19/1970 10.47 11/18/1971 9.13 10/15/1972 10.81 11/21/1973 12.99 05/11/1974 11.03 08/25/1975 11.72 05/27/1976 8.28 08/09/1977 10.98 11/14/1978 8.34 03/20/1979 9.40 05/10/1981 7.22 11/27/1982 20.91 06/06/1995 8.45 04/13/1996 8.52 03/09/1997 7.10 07/11/1998 8.52 03/08/1999 6.58 05/25/2000 9.31 11/19/2001 9.92 03/16/2002 10.04 11/05/2003 9.02 04/20/2004 9.82 09/14/2005 6.04 09/18/2006 11.01 11/22/2007 7.84 03/14/2008 19.83 04/10/2009 9.38 04/24/2010 8.41 04/15/2011 23.73 Duration: 45 days 03/07/1940 8.78 09/25/1941 13.06 02/17/1945 21.99 12/15/1948 14.10 05/09/1950 20.70 06/03/1951 13.65 03/10/1952 9.80 02/11/1953 7.65 03/19/1954 8.33 04/13/1955 10.45 01/30/1956 8.37 03/31/1957 16.13 03/23/1958 12.99 09/26/1959 8.53 04/15/1960 8.29 04/08/1961 12.40 08/23/1962 9.97 05/25/1963 9.65 03/04/1964 12.68 08/17/1965 9.18 04/11/1966 13.75 09/08/1967 10.36 11/01/1968 11.31 12/21/1968 10.64 09/19/1970 13.23 11/23/1971 9.90 09/24/1972 14.38 04/16/1973 18.81 04/29/1974 13.54 08/15/1975 13.37 05/27/1976 10.26 02/23/1977 13.63 11/07/1978 8.59 02/21/1979 12.99 05/10/1981 9.41 11/12/1982 23.46 06/06/1995 10.65 09/16/1996 10.48 02/21/1997 10.64 07/11/1998 8.98 03/06/1999 8.70 05/16/2000 11.33 11/03/2001 10.06 03/02/2002 13.62 11/15/2003 11.36 10/11/2004 10.86 08/16/2005 9.48 09/18/2006 13.77 12/31/2006 9.51 03/03/2008 22.09 04/10/2009 11.09 04/24/2010 8.90 04/11/2011 26.98 Duration: 60 days 03/07/1940 10.36 09/03/1941 14.54 02/17/1945 26.27 12/25/1948 14.93 04/22/1950 21.83 06/03/1951 15.75 02/25/1952 11.50 02/19/1953 8.60 03/19/1954 8.82 04/01/1955 12.11 01/19/1956 9.28 04/02/1957 22.78 03/07/1958 15.73 08/17/1959 9.00 05/05/1960 10.86 03/13/1961 14.81 08/23/1962 11.54 05/13/1963 11.33 02/06/1964 14.14 11/04/1965 11.18 04/08/1966 14.50 09/08/1967 11.80 11/01/1968 15.04 03/23/1969 9.27 09/03/1970 15.73 04/15/1971 11.13 09/22/1972 18.01 03/29/1973 22.37 04/12/1974 16.93 09/06/1975 14.18 05/06/1976 10.87 02/23/1977 16.88 10/10/1978 10.80 03/23/1979 17.12 04/19/1981 11.22 11/02/1982 24.99 05/27/1995 12.53 09/16/1996 14.27 02/14/1997 11.53 06/05/1998 10.16 03/08/1999 10.60 05/01/2000 12.82 11/27/2001 11.19 03/19/2002 17.82 11/05/2003 13.04 10/08/2004 14.74 08/07/2005 10.29 09/18/2006 17.82 12/21/2006 10.76 02/12/2008 25.64 03/28/2009 13.16 03/22/2010 10.68 03/26/2011 28.57