Precipitation annual maximum series (inches)
Station ID: 11-0137
Station name: ALTON DAM 26
State: IL
Latitude (decimal degrees): 38.8167
Longitude (decimal degrees): 90.1500
Elevation (feet): 430

Duration: 01d
3.24	1944
2.12	1945
5.40	1946
1.64	1947
2.53	1948
3.33	1949
3.58	1950
2.51	1951
4.68	1952
2.75	1953
1.90	1954
2.03	1955
2.08	1956
3.38	1957
1.51	1958
2.80	1959
2.57	1960
3.16	1961
1.84	1962
2.42	1963
1.77	1964
1.25	1965
1.90	1966
2.29	1967
1.99	1968
3.46	1969
2.37	1970
2.73	1971
2.88	1972
3.13	1973
3.79	1974
2.80	1975
2.40	1976
4.12	1977
2.37	1978
2.97	1979
3.27	1980
1.90	1981
2.71	1982
2.97	1983
2.10	1984
3.00	1985
3.50	1986
1.86	1987
2.28	1988
1.45	1989
2.74	1990
1.92	1991
2.55	1992
2.63	1993
2.00	1994
4.70	1995
7.70	1996
1.85	1997
2.11	1998
-9.99	1999
2.50	2000

Duration: 02d
4.96	1944
3.89	1945
8.31	1946
1.78	1947
2.53	1948
4.75	1949
5.15	1950
2.98	1951
4.74	1952
2.82	1953
3.06	1954
2.39	1955
2.42	1956
3.58	1957
1.98	1958
2.90	1959
3.25	1960
4.31	1961
2.62	1962
4.13	1963
2.26	1964
1.77	1965
2.58	1966
2.79	1967
2.55	1968
3.96	1969
2.84	1970
3.44	1971
3.44	1972
3.73	1973
4.05	1974
3.42	1975
2.69	1976
4.39	1977
2.80	1978
4.35	1979
3.27	1980
2.70	1981
4.17	1982
3.49	1983
2.71	1984
4.10	1985
3.94	1986
1.88	1987
2.68	1988
1.69	1989
3.84	1990
2.64	1991
2.70	1992
4.34	1993
3.21	1994
6.95	1995
9.50	1996
1.94	1997
3.87	1998
-9.99	1999
3.01	2000

Duration: 04d
4.96	1944
3.91	1945
9.84	1946
2.98	1947
2.54	1948
4.81	1949
5.43	1950
3.23	1951
5.13	1952
2.82	1953
3.06	1954
3.09	1955
4.32	1956
6.19	1957
3.16	1958
2.91	1959
5.36	1960
5.50	1961
4.10	1962
4.30	1963
2.33	1964
1.77	1965
3.61	1966
3.66	1967
4.59	1968
4.99	1969
4.59	1970
3.51	1971
4.02	1972
4.10	1973
4.05	1974
3.79	1975
2.69	1976
4.51	1977
3.15	1978
4.58	1979
3.27	1980
3.43	1981
4.67	1982
3.65	1983
3.15	1984
5.53	1985
5.10	1986
2.81	1987
3.11	1988
1.71	1989
3.86	1990
2.64	1991
3.97	1992
5.28	1993
4.44	1994
6.97	1995
9.50	1996
1.94	1997
4.19	1998
-9.99	1999
4.06	2000

Duration: 07d
5.04	1944
4.72	1945
10.30	1946
3.54	1947
4.62	1948
7.16	1949
5.50	1950
5.73	1951
5.14	1952
3.12	1953
3.06	1954
3.09	1955
5.15	1956
6.25	1957
4.28	1958
3.66	1959
5.89	1960
6.03	1961
4.91	1962
5.08	1963
3.06	1964
2.40	1965
3.75	1966
4.08	1967
5.07	1968
5.98	1969
4.61	1970
7.00	1971
4.09	1972
4.17	1973
4.68	1974
4.30	1975
3.11	1976
4.81	1977
3.67	1978
4.58	1979
3.27	1980
3.83	1981
4.71	1982
4.34	1983
3.33	1984
6.80	1985
7.15	1986
3.22	1987
3.75	1988
1.85	1989
5.69	1990
2.98	1991
4.07	1992
6.03	1993
5.10	1994
7.32	1995
14.44	1996
3.08	1997
4.74	1998
-9.99	1999
4.81	2000

Duration: 10d
5.92	1944
5.36	1945
11.56	1946
4.24	1947
4.79	1948
7.60	1949
5.93	1950
7.41	1951
5.56	1952
4.16	1953
3.47	1954
3.45	1955
5.70	1956
7.26	1957
4.41	1958
4.29	1959
6.62	1960
6.73	1961
4.91	1962
5.79	1963
3.35	1964
2.88	1965
3.89	1966
4.42	1967
6.87	1968
6.84	1969
5.68	1970
7.61	1971
5.25	1972
4.30	1973
5.27	1974
4.75	1975
3.56	1976
5.06	1977
3.99	1978
4.78	1979
3.57	1980
5.26	1981
5.64	1982
4.96	1983
3.71	1984
7.28	1985
8.05	1986
4.18	1987
3.93	1988
2.53	1989
6.25	1990
3.63	1991
4.89	1992
6.50	1993
5.36	1994
7.74	1995
17.26	1996
3.10	1997
5.59	1998
-9.99	1999
5.08	2000

Duration: 20d
9.69	1944
8.50	1945
14.56	1946
5.41	1947
6.20	1948
9.28	1949
8.51	1950
9.52	1951
6.32	1952
4.97	1953
3.78	1954
4.37	1955
6.69	1956
9.04	1957
6.81	1958
6.26	1959
8.91	1960
9.76	1961
5.52	1962
6.96	1963
4.20	1964
4.02	1965
5.64	1966
7.35	1967
8.96	1968
9.90	1969
9.10	1970
8.82	1971
6.66	1972
5.49	1973
6.91	1974
6.39	1975
4.15	1976
7.98	1977
5.71	1978
6.07	1979
6.09	1980
6.03	1981
7.27	1982
6.64	1983
6.23	1984
9.32	1985
9.60	1986
5.75	1987
5.28	1988
2.83	1989
8.25	1990
3.97	1991
6.66	1992
8.79	1993
7.49	1994
9.72	1995
20.47	1996
3.72	1997
7.43	1998
-9.99	1999
5.46	2000

Duration: 30d
11.95	1944
9.85	1945
15.76	1946
5.91	1947
9.94	1948
13.76	1949
10.01	1950
10.75	1951
7.63	1952
5.96	1953
5.75	1954
5.26	1955
7.73	1956
12.76	1957
7.45	1958
6.32	1959
9.39	1960
12.38	1961
7.41	1962
9.06	1963
5.42	1964
5.30	1965
6.29	1966
8.90	1967
9.63	1968
12.00	1969
11.42	1970
9.66	1971
7.94	1972
6.70	1973
8.51	1974
7.78	1975
5.10	1976
8.62	1977
7.12	1978
7.66	1979
7.86	1980
7.04	1981
8.09	1982
8.44	1983
7.86	1984
10.93	1985
10.72	1986
6.94	1987
5.74	1988
3.39	1989
9.86	1990
5.76	1991
8.05	1992
11.47	1993
9.26	1994
10.66	1995
21.87	1996
5.24	1997
8.73	1998
-9.99	1999
8.25	2000

Duration: 45d
14.94	1944
12.22	1945
17.25	1946
6.83	1947
11.50	1948
14.35	1949
11.14	1950
12.83	1951
9.45	1952
7.25	1953
7.19	1954
7.08	1955
10.86	1956
15.78	1957
8.58	1958
8.11	1959
13.74	1960
15.10	1961
9.44	1962
11.08	1963
6.98	1964
5.95	1965
8.43	1966
9.69	1967
10.83	1968
13.54	1969
13.37	1970
10.15	1971
9.89	1972
8.66	1973
11.12	1974
10.44	1975
6.39	1976
10.34	1977
9.18	1978
9.51	1979
8.23	1980
10.95	1981
11.01	1982
11.96	1983
10.21	1984
11.33	1985
12.37	1986
10.63	1987
7.19	1988
4.95	1989
11.78	1990
6.69	1991
9.92	1992
12.62	1993
10.18	1994
12.08	1995
25.58	1996
7.04	1997
10.80	1998
-9.99	1999
9.72	2000

Duration: 60d
17.24	1944
15.22	1945
19.64	1946
8.33	1947
12.44	1948
16.35	1949
12.33	1950
15.12	1951
10.27	1952
9.62	1953
7.53	1954
8.48	1955
13.74	1956
17.42	1957
11.12	1958
9.22	1959
15.56	1960
15.70	1961
10.45	1962
12.96	1963
8.66	1964
7.80	1965
9.35	1966
11.23	1967
11.43	1968
15.03	1969
18.77	1970
10.63	1971
11.37	1972
10.57	1973
11.91	1974
12.23	1975
7.41	1976
11.42	1977
11.65	1978
11.00	1979
11.37	1980
12.06	1981
12.16	1982
14.44	1983
12.15	1984
13.06	1985
13.22	1986
10.90	1987
10.55	1988
4.91	1989
14.28	1990
8.70	1991
11.08	1992
14.39	1993
10.77	1994
13.38	1995
28.64	1996
8.82	1997
13.11	1998
-9.99	1999
11.79	2000