Precipitation partial duration series (inches)
Station ID: 11-1549
Station name: CHICAGO O'HARE WSO ARP
State: IL
Latitude (decimal degrees): 41.9950
Longitude (decimal degrees): 87.9336
Elevation (feet): 658

Duration: 01d
08/14/1987	6.49
07/13/1957	6.11
10/10/1954	4.86
12/02/1982	4.47
10/10/1969	4.25
07/06/1943	4.03
10/17/1988	3.61
08/30/1975	3.48
08/04/1989	3.47
05/29/1981	3.45
02/21/1997	3.44
08/16/1968	3.43
04/25/1954	3.25
05/09/1990	3.14
03/25/1954	3.14
06/29/1946	3.12
06/10/1967	3.09
11/27/1990	2.93
07/18/1993	2.90
08/26/1943	2.89
09/13/1961	2.88
08/18/1990	2.85
09/21/1947	2.85
07/02/1962	2.84
09/13/1978	2.83
10/22/1983	2.81
11/01/1985	2.74
10/17/1998	2.69
06/23/1994	2.69
05/11/1966	2.69
10/06/1955	2.64
10/04/1991	2.57
09/17/1972	2.55
08/25/1972	2.49
11/27/1983	2.45
06/03/1954	2.43
09/11/2000	2.37
04/20/2000	2.37
11/10/1995	2.37
04/16/1972	2.36
09/25/1941	2.36
09/01/1989	2.33
07/18/1964	2.33
08/24/1971	2.30
10/31/1994	2.26
07/22/1982	2.26
08/29/1979	2.24
05/12/1970	2.11
05/09/1996	2.10
10/18/1985	2.09
04/25/1976	2.09
04/05/1947	2.08
07/11/1940	2.08
05/07/1998	2.07
07/18/1989	2.06
08/07/1982	2.06
03/19/1948	2.06
04/28/1981	2.04

Duration: 01h
09/13/1978	2.00
08/14/1987	1.94
09/01/1989	1.85
07/18/1997	1.75
08/24/1971	1.72
08/25/1972	1.65
06/10/1967	1.65
08/04/1989	1.64
07/13/1965	1.59
04/16/1972	1.56
08/18/1990	1.55
08/13/1985	1.55
05/29/1981	1.51
07/02/1962	1.45
08/16/1980	1.44
07/20/1984	1.41
08/05/1998	1.38
07/12/1981	1.36
10/17/1988	1.35
09/05/1969	1.32
07/18/1964	1.32
12/24/1982	1.29
07/18/1993	1.26
08/15/1993	1.25
09/12/1988	1.23
07/21/1999	1.22
08/21/1975	1.22
09/15/1992	1.19
07/08/1971	1.18
10/18/1985	1.17
07/02/1982	1.14
08/07/1982	1.11
08/29/1979	1.10
10/10/1969	1.10
08/16/1995	1.08
09/25/1977	1.07
08/03/1963	1.07
09/22/1964	1.06
07/04/1995	1.04

Duration: 02d
08/13/1987	9.35
07/12/1957	6.43
10/10/1954	5.54
10/10/1969	4.66
12/02/1982	4.62
08/04/1989	4.24
02/20/1997	4.07
07/05/1943	4.03
09/12/1961	3.97
08/18/1990	3.94
06/23/1994	3.80
08/29/1975	3.80
08/15/1968	3.67
10/16/1988	3.64
10/05/1955	3.60
03/24/1954	3.60
04/25/1954	3.54
05/28/1981	3.45
05/09/1990	3.34
06/29/1946	3.26
09/13/1978	3.18
08/25/1943	3.17
10/21/1983	3.16
08/04/1998	3.10
05/11/1966	3.10
06/09/1967	3.09
07/18/1989	3.08
11/26/1990	3.04
04/19/2000	3.00
04/27/1956	2.96
10/17/1998	2.94
11/01/1985	2.92
04/01/1983	2.91
07/17/1993	2.90
04/24/1976	2.90
07/01/1962	2.89
09/20/1947	2.85
10/03/1991	2.84
07/08/1951	2.79
09/17/1972	2.77
08/16/1980	2.76
07/21/1982	2.73
06/17/1993	2.68
05/31/1942	2.68
06/06/1942	2.67
07/17/1996	2.66
11/27/1983	2.66
09/27/1999	2.64
11/10/1995	2.58
06/12/1952	2.58
06/16/1978	2.53
04/04/1947	2.53
08/25/1972	2.52
05/12/1970	2.52
06/03/1954	2.51
05/02/1945	2.49
09/08/1941	2.45
09/11/2000	2.44

Duration: 02h
08/14/1987	3.09
08/04/1989	3.03
08/18/1990	2.77
06/10/1967	2.35
09/13/1978	2.33
05/29/1981	2.31
08/24/1971	2.22
09/01/1989	2.15
08/16/1980	2.09
12/02/1982	1.95
08/25/1972	1.95
10/17/1988	1.92
07/02/1982	1.89
04/16/1972	1.89
10/10/1969	1.88
07/18/1993	1.86
09/12/1988	1.86
08/07/1982	1.83
07/02/1962	1.77
07/18/1997	1.75
07/12/1981	1.75
07/13/1965	1.73
07/21/1999	1.69
08/05/1998	1.66
07/20/1984	1.63
08/13/1985	1.59
06/12/1970	1.59
08/16/1968	1.58
07/04/1995	1.51
06/29/1990	1.48
09/17/1972	1.46
06/17/1978	1.44
10/03/1986	1.43
04/18/1975	1.43
08/21/1975	1.42
08/23/1993	1.40
08/29/1979	1.40
09/11/1986	1.38
07/18/1964	1.38

Duration: 03h
08/13/1987	3.32
08/04/1989	3.26
08/18/1990	2.85
06/10/1967	2.76
05/29/1981	2.67
10/17/1988	2.62
09/13/1978	2.58
08/24/1971	2.30
10/10/1969	2.28
09/01/1989	2.22
04/16/1972	2.19
08/16/1968	2.19
08/25/1972	2.18
12/02/1982	2.14
08/16/1980	2.12
07/02/1982	2.01
08/07/1982	2.00
07/02/1962	1.98
09/12/1988	1.93
08/05/1998	1.87
07/18/1993	1.86
09/17/1972	1.85
07/18/1997	1.84
07/21/1999	1.78
07/12/1981	1.76
07/13/1965	1.75
08/13/1985	1.64
07/20/1984	1.64
07/04/1995	1.63
06/29/1990	1.63
06/12/1970	1.60
06/23/1994	1.58
10/03/1986	1.57
08/30/1975	1.55
09/11/1986	1.53
08/29/1979	1.50
04/18/1975	1.49
07/14/1972	1.48
10/18/1985	1.46

Duration: 04d
08/13/1987	12.84
07/12/1957	6.43
10/10/1954	5.58
10/10/1969	5.46
12/02/1982	5.37
08/18/1990	5.27
09/11/1961	4.81
08/04/1989	4.25
07/03/1943	4.19
09/22/1961	4.18
08/28/1975	4.15
02/20/1997	4.08
04/27/1956	3.87
06/07/1967	3.83
06/23/1994	3.80
03/01/1976	3.80
10/04/1955	3.77
05/31/1954	3.75
10/15/1988	3.74
08/15/1968	3.69
05/09/1990	3.65
04/25/1954	3.63
03/24/1954	3.60
08/22/1972	3.59
05/12/1970	3.56
07/17/1943	3.53
08/16/1980	3.52
08/03/1998	3.51
06/17/1993	3.50
10/20/1983	3.49
05/29/1981	3.45
05/31/1942	3.43
06/10/1999	3.38
09/13/1978	3.38
07/18/1989	3.27
06/29/1946	3.26
04/19/2000	3.22
08/23/1943	3.22
06/30/1978	3.19
08/11/1956	3.18
05/11/1966	3.17
10/02/1991	3.16
09/17/1978	3.15
11/26/1990	3.04
08/25/1987	3.03
03/30/1983	3.02
10/07/1990	3.01
10/31/1992	3.00
10/31/1985	3.00
09/17/1972	3.00
10/15/1998	2.97
04/23/1976	2.96
06/23/1968	2.95
09/11/1972	2.94
07/15/1996	2.93
07/01/1962	2.91
07/18/1993	2.90
04/16/1972	2.89

Duration: 06h
08/13/1987	5.95
10/10/1969	3.71
08/04/1989	3.45
08/16/1968	3.43
10/17/1988	3.30
12/02/1982	3.16
05/29/1981	3.10
06/10/1967	3.07
08/18/1990	2.85
09/13/1978	2.74
07/02/1962	2.73
06/23/1994	2.64
09/17/1972	2.55
08/25/1972	2.49
08/16/1980	2.45
08/30/1975	2.37
04/16/1972	2.34
09/01/1989	2.32
05/09/1990	2.31
08/24/1971	2.30
07/22/1982	2.13
02/21/1997	2.10
10/22/1983	2.10
08/29/1979	2.10
08/07/1982	2.04
11/27/1983	1.95
09/12/1988	1.93
08/05/1998	1.87
08/15/1993	1.87
06/30/1977	1.87
07/18/1964	1.87
07/18/1993	1.86
07/18/1997	1.84
06/14/1972	1.80
07/21/1999	1.78
09/24/1973	1.77
07/12/1981	1.76
07/13/1965	1.76
06/29/1990	1.73

Duration: 07d
08/13/1987	13.12
07/12/1957	6.68
09/12/1978	6.48
10/05/1954	6.45
11/28/1982	5.70
10/10/1969	5.53
09/11/1972	5.49
08/17/1990	5.43
05/04/1990	5.08
07/29/1989	5.05
08/16/1980	4.95
05/31/1942	4.95
09/11/1961	4.81
05/28/1954	4.72
04/20/1954	4.69
02/20/1997	4.67
06/20/1994	4.51
04/16/2000	4.43
06/07/1967	4.42
08/15/1968	4.29
03/24/1954	4.29
11/23/1983	4.26
09/28/1986	4.25
06/12/1952	4.23
07/06/1943	4.23
08/11/1997	4.22
09/21/1961	4.19
08/28/1975	4.15
06/14/1993	4.10
10/17/1988	4.08
02/29/1976	4.08
12/09/1971	4.06
05/09/1970	4.04
05/06/1948	4.04
05/23/1981	4.02
06/27/1983	4.01
10/31/1994	3.98
06/05/1955	3.92
04/27/1956	3.87
07/18/1941	3.86
03/27/1983	3.84
05/14/1943	3.80
07/13/1963	3.77
10/04/1955	3.77
05/28/1980	3.76
08/03/1998	3.74
07/12/1972	3.73
07/13/1943	3.73
05/22/1955	3.71
04/21/1999	3.70
06/07/1961	3.69
06/25/1978	3.66
04/22/1981	3.65
09/09/1970	3.64
06/02/1969	3.64
08/19/1972	3.62
09/27/1999	3.61
05/22/1984	3.61

Duration: 10d
08/13/1987	13.68
10/03/1954	8.10
07/13/1957	7.17
08/12/1990	6.98
09/12/1978	6.63
05/31/1942	6.24
11/26/1982	6.11
08/21/1975	6.11
09/05/1961	5.96
09/11/1972	5.94
10/10/1969	5.93
07/29/1989	5.83
09/24/1986	5.53
09/25/1941	5.48
05/04/1990	5.45
08/13/1980	5.45
06/17/1994	5.38
09/27/1955	5.26
09/06/1970	5.12
06/07/1967	5.12
02/20/1997	5.10
04/27/1956	5.03
05/01/1948	4.90
05/27/1954	4.86
05/11/1943	4.81
04/18/1954	4.80
06/17/1993	4.77
11/19/1983	4.77
04/19/1966	4.74
06/12/1952	4.73
06/28/1943	4.67
03/31/1983	4.60
09/02/1942	4.58
09/21/1961	4.54
04/16/2000	4.53
06/25/1978	4.50
09/20/1945	4.44
10/31/1994	4.43
04/15/1999	4.38
10/31/1985	4.36
09/16/1973	4.36
06/04/1955	4.32
08/15/1968	4.29
03/24/1954	4.29
12/06/1971	4.25
05/10/1957	4.25
07/02/1982	4.24
08/11/1997	4.23
10/15/1988	4.21
05/23/1970	4.18
07/18/1993	4.15
05/31/1969	4.15
05/09/1970	4.14
06/27/1983	4.11
02/29/1976	4.08
09/07/1980	4.06
04/12/1972	4.04
05/23/1981	4.02

Duration: 12h
08/13/1987	8.35
10/10/1969	4.11
12/02/1982	3.80
10/17/1988	3.55
08/04/1989	3.45
08/16/1968	3.44
08/29/1975	3.19
05/09/1990	3.16
02/20/1997	3.12
05/29/1981	3.10
06/23/1994	3.09
06/10/1967	3.09
08/17/1990	2.89
09/12/1978	2.84
07/02/1962	2.84
07/18/1993	2.76
08/16/1980	2.62
09/17/1972	2.55
10/22/1983	2.50
08/25/1972	2.49
04/16/1972	2.36
09/01/1989	2.32
07/18/1964	2.31
08/24/1971	2.30
07/21/1982	2.27
08/29/1979	2.24
11/27/1983	2.22
10/17/1998	2.20
05/11/1966	2.20
11/01/1985	2.18
09/24/1973	2.16
07/18/1989	2.13
03/03/1985	2.13
10/04/1991	2.11
11/10/1995	2.06
10/18/1985	2.06
08/07/1982	2.06
12/14/1971	1.99
06/14/1972	1.95

Duration: 20d
08/08/1987	17.09
07/18/1989	9.59
09/11/1961	9.35
07/12/1957	8.81
09/29/1954	8.79
11/19/1982	8.60
06/28/1943	8.60
08/02/1980	8.08
09/17/1986	7.95
09/06/1970	7.89
10/31/1985	7.73
08/03/1990	7.72
09/10/1972	7.70
05/31/1942	7.51
06/06/1967	7.43
05/23/1955	7.43
06/16/1978	7.36
05/31/1993	7.33
04/08/1999	7.28
09/25/1941	7.20
04/27/1956	7.05
03/26/1983	7.02
09/13/1978	6.99
08/20/1975	6.99
05/29/1981	6.98
05/08/1943	6.90
04/23/1966	6.77
05/02/1945	6.76
05/09/1996	6.72
09/13/1945	6.65
10/06/1969	6.36
05/11/1970	6.26
05/13/1947	6.18
05/03/1990	6.12
04/18/1976	6.10
06/08/1994	6.09
08/27/1942	6.08
07/03/1982	6.07
06/09/1952	6.07
07/27/1981	6.06
08/09/1943	6.05
09/15/1973	6.02
04/26/1948	6.00
08/10/1979	5.99
11/23/1983	5.97
09/27/1955	5.78
04/05/1947	5.76
08/21/1941	5.73
10/17/1988	5.68
03/31/1993	5.65
02/15/1976	5.59
04/20/1954	5.59
06/12/1946	5.57
04/09/1995	5.54
08/15/1993	5.52
02/11/1997	5.42
09/05/1983	5.38
08/29/1980	5.35

Duration: 24h
08/13/1987	9.35
10/10/1969	4.62
12/02/1982	4.53
06/23/1994	3.79
08/04/1989	3.69
10/17/1988	3.61
08/29/1975	3.56
02/20/1997	3.55
05/29/1981	3.45
08/16/1968	3.44
05/09/1990	3.34
10/21/1983	3.14
06/10/1967	3.09
08/17/1990	3.01
09/16/1978	3.00
11/26/1990	2.99
10/17/1998	2.93
07/18/1993	2.90
07/01/1962	2.89
05/11/1966	2.88
04/01/1983	2.78
09/17/1972	2.77
08/16/1980	2.76
04/24/1976	2.76
07/21/1982	2.73
10/31/1985	2.68
10/03/1991	2.64
11/10/1995	2.57
11/27/1983	2.52
08/25/1972	2.52
05/12/1970	2.41
08/07/1982	2.40
03/03/1985	2.39
07/17/1964	2.39
04/16/1972	2.36
08/02/1981	2.35
07/17/1996	2.33
09/01/1989	2.33
04/29/1963	2.31

Duration: 30d
07/31/1987	17.73
09/01/1961	11.44
07/12/1957	11.22
07/18/1989	10.91
11/08/1982	10.70
08/22/1972	10.01
06/01/1993	9.96
08/09/1980	9.94
09/10/1986	9.79
09/17/1954	9.39
04/17/1966	9.38
03/18/1983	9.22
06/20/1943	9.08
05/05/1970	8.98
04/27/1943	8.89
09/05/1941	8.88
09/02/1970	8.69
06/28/1982	8.54
06/07/1978	8.53
06/09/1952	8.46
05/14/1942	8.45
10/23/1985	8.41
06/10/1967	8.25
09/01/1945	8.23
05/22/1955	8.03
04/18/1945	8.03
10/17/1988	8.02
05/23/1981	7.84
07/24/1990	7.83
06/01/1969	7.76
04/08/1999	7.69
08/03/1979	7.57
05/09/1996	7.53
04/27/1956	7.51
05/13/1947	7.48
10/03/1991	7.43
11/15/1983	7.40
05/27/1954	7.40
08/02/1975	7.37
04/04/1947	7.36
03/22/1993	7.28
09/15/1973	7.28
08/22/1978	7.15
07/12/1981	7.11
09/23/1969	7.11
05/04/1990	7.00
05/15/1999	6.98
08/24/1947	6.92
08/03/1998	6.88
07/29/1943	6.85
08/22/1942	6.85
07/12/1972	6.81
07/23/1968	6.75
04/24/1957	6.75
08/04/1977	6.69
04/18/1976	6.67
04/27/1983	6.64
07/18/1993	6.63

Duration: 45d
07/15/1987	20.13
08/04/1980	13.11
06/04/1993	13.10
07/19/1989	12.92
09/05/1961	12.61
10/28/1982	12.58
08/30/1941	12.56
05/09/1970	12.55
07/12/1957	12.19
10/18/1985	12.03
08/19/1972	11.79
03/18/1983	11.76
07/03/1943	11.75
06/27/1982	11.38
06/09/1952	11.16
03/19/1954	11.04
04/08/1999	10.82
06/07/1978	10.80
10/15/1988	10.68
09/11/1986	10.64
04/02/1945	10.63
04/17/1966	10.60
05/27/1954	10.42
04/19/1947	10.31
05/31/1942	10.11
04/12/1943	10.10
05/29/1981	10.02
08/12/1970	10.00
07/10/1990	9.96
05/19/1983	9.89
09/14/1954	9.66
08/15/1993	9.63
05/17/1969	9.62
07/22/1979	9.49
10/19/1983	9.37
08/25/1945	9.37
04/28/1974	9.36
04/14/1996	9.31
05/28/1967	9.29
07/25/1981	9.28
05/09/1957	9.18
04/09/1995	9.12
08/09/1965	8.89
07/18/1975	8.87
06/28/1972	8.85
03/28/1979	8.83
08/26/1977	8.82
05/22/1955	8.73
08/03/1998	8.70
09/04/1969	8.68
10/02/1991	8.63
05/04/1990	8.43
08/09/1978	8.35
09/17/1973	8.32
07/30/1942	8.31
04/16/2000	8.30
03/21/1993	8.28
07/03/1951	8.23

Duration: 48h
08/13/1987	9.94
10/09/1969	4.69
12/02/1982	4.62
08/04/1989	4.24
08/18/1990	4.08
08/28/1975	4.08
02/20/1997	3.84
06/23/1994	3.80
08/15/1968	3.68
10/15/1988	3.67
06/10/1967	3.53
08/03/1998	3.47
05/29/1981	3.45
06/17/1993	3.38
05/09/1990	3.34
09/16/1978	3.26
10/21/1983	3.21
06/30/1978	3.13
07/18/1989	3.12
05/11/1966	3.10
11/26/1990	3.04
10/31/1985	3.00
05/12/1970	2.96
04/23/1976	2.95
10/17/1998	2.94
09/17/1972	2.93
07/01/1962	2.91
07/18/1993	2.90
06/11/1999	2.89
03/31/1983	2.88
10/03/1991	2.85
08/16/1980	2.76
07/21/1982	2.73
06/23/1968	2.68
09/27/1999	2.67
11/27/1983	2.66
06/06/1969	2.64
04/14/1972	2.63
11/10/1995	2.58

Duration: 60d
06/29/1987	21.42
07/18/1989	16.56
07/20/1980	15.70
10/31/1982	15.69
06/28/1943	15.45
04/29/1970	15.35
05/28/1993	15.11
08/01/1972	15.11
08/31/1961	14.90
06/13/1957	14.79
08/30/1941	14.61
04/15/1999	14.58
10/04/1985	14.15
03/31/1983	13.99
04/04/1947	13.86
04/17/1966	13.49
04/19/1981	13.21
06/12/1982	12.71
08/16/1954	12.59
04/12/1945	12.54
06/22/1990	12.25
07/27/1970	12.21
05/28/1952	12.05
04/25/1954	11.84
10/20/1983	11.78
07/12/1981	11.78
09/12/1988	11.73
08/01/1945	11.62
08/04/1977	11.53
07/26/1965	11.44
04/16/2000	11.38
05/04/1978	11.33
05/14/1942	11.32
05/31/1969	11.31
03/15/1948	11.19
04/28/1974	11.13
08/26/1986	10.98
10/02/1991	10.95
06/23/1968	10.88
04/01/1943	10.88
04/18/1975	10.65
06/19/1951	10.64
04/12/1996	10.34
04/09/1995	10.31
04/13/1955	10.25
02/29/1976	10.24
08/05/1993	10.21
04/26/1967	10.21
07/30/1942	10.20
03/17/1979	10.18
07/20/1978	10.15
03/27/1991	10.09
06/17/1994	10.05
07/11/1975	9.84
07/03/1979	9.76
10/07/1990	9.72
05/17/1986	9.67
08/23/1998	9.63