Precipitation annual maximum series (inches) Station ID: 11-1564 Station name: CHICAGO S WTR FILT PLA State: IL Latitude (decimal degrees): 41.7500 Longitude (decimal degrees): 87.5500 Elevation (feet): 610 Duration: 01d 1.55 1948 2.37 1949 3.29 1950 -9.99 1951 1.44 1952 1.99 1953 3.77 1954 3.93 1955 1.11 1956 4.03 1957 2.11 1958 2.26 1959 2.76 1960 2.90 1961 1.20 1962 2.37 1963 1.30 1964 2.92 1965 3.02 1966 2.94 1967 3.24 1968 1.85 1969 2.08 1970 2.09 1971 1.38 1972 1.21 1973 1.36 1974 2.36 1975 1.71 1976 2.97 1977 -9.99 1978 1.66 1979 Duration: 01h 07/21/1948 1.15 07/09/1949 0.73 06/02/1950 1.33 -9/-9/-999 -9.99 06/13/1952 1.13 04/30/1953 1.13 08/18/1954 2.11 07/23/1955 1.80 08/12/1956 0.60 08/03/1957 2.00 06/13/1958 1.35 06/25/1959 1.05 07/02/1960 1.06 09/12/1961 0.95 04/30/1962 0.80 07/16/1963 1.13 08/21/1964 1.17 09/08/1965 1.00 07/27/1966 0.70 06/10/1967 0.55 08/16/1968 0.92 07/17/1969 1.11 06/13/1970 1.24 06/18/1971 0.86 04/12/1972 0.67 08/10/1973 0.36 05/21/1974 0.87 05/30/1975 1.23 06/13/1976 0.66 09/01/1977 0.81 -9/-9/-999 -9.99 07/30/1979 0.44 -9/-9/-999 -9.99 Duration: 02d 1.55 1948 3.39 1949 3.29 1950 -9.99 1951 2.63 1952 2.18 1953 6.77 1954 4.54 1955 1.77 1956 4.21 1957 2.32 1958 2.81 1959 2.91 1960 4.50 1961 1.20 1962 2.44 1963 1.40 1964 3.42 1965 3.40 1966 2.95 1967 4.07 1968 2.39 1969 2.17 1970 2.22 1971 1.55 1972 1.62 1973 1.57 1974 2.62 1975 1.74 1976 3.11 1977 -9.99 1978 2.29 1979 Duration: 02h 07/10/1948 1.26 07/09/1949 0.92 06/02/1950 1.76 -9/-9/-999 -9.99 08/09/1952 1.21 07/29/1953 1.65 07/02/1954 2.65 07/23/1955 1.88 08/12/1956 0.67 08/03/1957 3.00 06/13/1958 1.78 04/27/1959 1.60 07/02/1960 1.74 09/13/1961 1.55 04/30/1962 0.92 07/16/1963 1.63 08/21/1964 1.30 09/08/1965 1.60 07/27/1966 1.20 06/10/1967 0.95 08/16/1968 1.60 07/17/1969 1.61 04/30/1970 1.65 07/05/1971 0.90 08/25/1972 1.09 05/25/1973 0.61 07/02/1974 1.31 08/02/1975 1.66 06/13/1976 1.10 09/01/1977 1.53 -9/-9/-999 -9.99 07/30/1979 0.71 -9/-9/-999 -9.99 Duration: 03h 07/10/1948 1.26 12/21/1949 1.13 06/02/1950 1.94 -9/-9/-999 -9.99 08/09/1952 1.33 07/29/1953 1.77 07/02/1954 2.70 08/29/1955 2.15 04/29/1956 0.80 08/03/1957 3.07 06/13/1958 2.03 04/27/1959 1.90 07/02/1960 1.75 09/13/1961 1.98 04/30/1962 0.95 07/16/1963 1.93 08/21/1964 1.30 09/08/1965 1.91 07/27/1966 1.40 06/10/1967 1.15 08/16/1968 2.41 07/17/1969 1.65 04/30/1970 1.65 07/05/1971 1.21 08/25/1972 1.19 04/21/1973 0.70 07/02/1974 1.31 08/02/1975 1.67 06/13/1976 1.34 08/31/1977 1.67 -9/-9/-999 -9.99 11/21/1979 0.82 -9/-9/-999 -9.99 Duration: 04d 2.03 1948 3.61 1949 3.53 1950 -9.99 1951 2.63 1952 2.32 1953 7.96 1954 4.80 1955 2.63 1956 4.21 1957 2.44 1958 2.95 1959 3.28 1960 5.76 1961 1.29 1962 4.33 1963 1.88 1964 3.42 1965 3.59 1966 4.30 1967 4.15 1968 3.12 1969 2.36 1970 2.24 1971 2.93 1972 1.71 1973 1.96 1974 2.62 1975 1.83 1976 3.49 1977 -9.99 1978 2.65 1979 Duration: 06h 07/10/1948 1.28 12/21/1949 1.54 06/02/1950 1.98 -9/-9/-999 -9.99 06/13/1952 1.34 07/29/1953 1.81 10/03/1954 3.30 08/29/1955 3.36 04/28/1956 1.06 07/12/1957 3.35 06/13/1958 2.10 04/27/1959 2.43 07/02/1960 1.76 09/13/1961 2.69 07/02/1962 1.02 07/16/1963 2.37 08/21/1964 1.30 09/08/1965 1.97 07/27/1966 1.72 06/10/1967 2.11 08/16/1968 3.25 07/17/1969 1.65 04/30/1970 1.67 07/04/1971 2.14 08/25/1972 1.38 04/21/1973 0.83 07/01/1974 1.35 05/30/1975 1.86 06/13/1976 1.71 08/31/1977 2.10 -9/-9/-999 -9.99 11/25/1979 1.22 -9/-9/-999 -9.99 Duration: 07d 2.36 1948 3.83 1949 4.29 1950 -9.99 1951 3.18 1952 3.41 1953 8.82 1954 4.80 1955 2.76 1956 4.38 1957 4.58 1958 3.68 1959 3.38 1960 5.76 1961 1.82 1962 5.88 1963 2.27 1964 3.51 1965 3.86 1966 5.59 1967 4.24 1968 3.12 1969 2.58 1970 2.96 1971 2.95 1972 2.13 1973 2.68 1974 2.69 1975 2.43 1976 4.02 1977 -9.99 1978 3.51 1979 Duration: 10d 2.48 1948 4.18 1949 5.06 1950 -9.99 1951 3.58 1952 3.43 1953 12.41 1954 5.72 1955 3.46 1956 5.37 1957 4.72 1958 3.69 1959 3.47 1960 5.98 1961 1.86 1962 6.31 1963 2.74 1964 3.51 1965 3.92 1966 6.95 1967 4.38 1968 3.87 1969 2.89 1970 3.37 1971 2.95 1972 2.47 1973 3.14 1974 2.84 1975 2.50 1976 4.54 1977 -9.99 1978 3.92 1979 Duration: 12h 09/08/1948 1.55 12/21/1949 2.11 06/02/1950 2.07 -9/-9/-999 -9.99 06/13/1952 1.34 04/30/1953 2.04 10/09/1954 4.11 08/29/1955 3.56 04/28/1956 1.35 07/12/1957 4.09 06/12/1958 2.32 04/27/1959 2.70 01/12/1960 2.29 09/13/1961 2.70 08/06/1962 1.20 07/16/1963 2.37 08/21/1964 1.30 12/24/1965 2.14 05/11/1966 2.51 06/10/1967 2.94 08/16/1968 3.32 07/17/1969 1.65 04/30/1970 1.76 07/04/1971 2.22 08/25/1972 1.38 04/21/1973 1.04 05/21/1974 1.36 08/02/1975 2.27 06/13/1976 1.71 08/31/1977 2.48 -9/-9/-999 -9.99 11/20/1979 1.55 -9/-9/-999 -9.99 Duration: 20d 3.49 1948 5.39 1949 8.47 1950 -9.99 1951 4.33 1952 4.70 1953 12.98 1954 6.54 1955 5.14 1956 6.17 1957 6.73 1958 4.49 1959 3.81 1960 10.62 1961 2.96 1962 6.59 1963 3.78 1964 6.01 1965 5.72 1966 8.14 1967 5.29 1968 4.71 1969 4.78 1970 4.24 1971 4.20 1972 3.32 1973 3.93 1974 4.41 1975 3.27 1976 5.80 1977 -9.99 1978 4.31 1979 Duration: 24h 09/08/1948 1.55 12/20/1949 2.59 06/02/1950 3.29 -9/-9/-999 -9.99 04/12/1952 1.75 04/30/1953 2.10 10/09/1954 6.53 07/23/1955 3.93 04/28/1956 1.59 07/12/1957 4.21 06/12/1958 2.32 04/27/1959 2.75 01/11/1960 2.83 09/12/1961 3.01 08/06/1962 1.20 07/16/1963 2.37 08/21/1964 1.30 12/24/1965 3.12 05/11/1966 3.20 06/10/1967 2.95 08/16/1968 3.32 07/17/1969 2.09 04/30/1970 2.08 07/04/1971 2.22 08/25/1972 1.38 04/21/1973 1.55 05/21/1974 1.57 08/01/1975 2.57 06/13/1976 1.71 08/31/1977 3.11 -9/-9/-999 -9.99 12/23/1979 1.83 -9/-9/-999 -9.99 Duration: 30d 3.93 1948 7.23 1949 10.08 1950 -9.99 1951 5.44 1952 5.89 1953 13.17 1954 7.64 1955 5.40 1956 10.55 1957 7.54 1958 7.08 1959 6.25 1960 11.95 1961 3.77 1962 8.14 1963 5.00 1964 8.66 1965 8.03 1966 9.74 1967 6.41 1968 6.55 1969 6.47 1970 4.70 1971 4.49 1972 4.00 1973 5.53 1974 6.15 1975 3.69 1976 8.02 1977 -9.99 1978 5.64 1979 Duration: 45d 4.73 1948 8.80 1949 12.16 1950 -9.99 1951 6.89 1952 8.41 1953 13.50 1954 10.98 1955 6.45 1956 12.27 1957 9.13 1958 8.79 1959 6.66 1960 12.75 1961 4.79 1962 9.02 1963 6.51 1964 10.95 1965 9.39 1966 10.55 1967 7.06 1968 7.70 1969 9.28 1970 6.13 1971 5.79 1972 5.48 1973 6.93 1974 7.24 1975 4.54 1976 9.95 1977 -9.99 1978 7.51 1979 Duration: 48h 09/08/1948 1.63 12/20/1949 3.39 06/02/1950 3.29 -9/-9/-999 -9.99 06/12/1952 2.63 04/30/1953 2.18 10/09/1954 7.91 10/04/1955 4.72 04/27/1956 1.96 07/12/1957 4.21 06/12/1958 2.32 04/26/1959 2.92 01/11/1960 2.92 09/12/1961 5.71 08/06/1962 1.20 04/29/1963 2.44 04/05/1964 1.40 12/24/1965 3.42 05/11/1966 3.40 06/10/1967 2.95 08/15/1968 4.15 07/17/1969 2.57 04/30/1970 2.17 07/04/1971 2.22 08/22/1972 1.55 04/20/1973 1.71 05/21/1974 1.57 08/01/1975 2.62 04/23/1976 1.78 08/31/1977 3.11 -9/-9/-999 -9.99 12/23/1979 2.29 -9/-9/-999 -9.99 Duration: 60d 5.55 1948 7.86 1949 15.72 1950 -9.99 1951 8.76 1952 9.52 1953 18.36 1954 12.36 1955 7.41 1956 13.71 1957 9.94 1958 10.45 1959 7.57 1960 15.39 1961 5.49 1962 10.85 1963 7.88 1964 13.13 1965 11.16 1966 11.61 1967 9.34 1968 9.61 1969 11.76 1970 7.15 1971 7.34 1972 6.87 1973 8.89 1974 8.55 1975 6.92 1976 11.23 1977 -9.99 1978 9.05 1979