CHIEF JOSEPH DAM, WA

Total of Precipitation (Inches)

(451400)

File last updated on May 13, 2024
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.

YEAR(S)	JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC		ANN
1949	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	-----	z	0.37		1.33		0.54		2.24	i
1950	1.77		1.17		1.45		0.83		0.81		0.77	d	0.01	a	0.00		0.08		1.97	b	1.02		1.82	c	11.70
1951	1.39		0.69		0.77		0.25		0.33		1.69		0.44		1.52		0.21		1.58		2.34		1.61		12.82
1952	1.90	a	0.64		0.23		0.16		0.40		1.63		0.05		0.00		0.42		0.00		0.49		1.68		7.60
1953	1.91	c	0.38		0.44		0.82		1.45	a	1.61	a	0.00		0.44		0.00		0.16		1.36		0.72	a	9.29
1954	1.16		0.29		0.90		0.00		1.28	a	2.29		0.00		-----	z	0.68		0.00		1.38		0.59		8.57	a
1955	0.63		0.14		0.35		1.01		0.26		1.09		1.07		0.00		0.45		0.65		1.84		3.26		10.75
1956	2.39		0.95	b	0.30		0.10		0.18		-----	z	0.05		1.31		0.03		2.04		0.45	d	0.25	c	8.05	a
1957	0.97		0.49		1.83		1.28		1.62		0.12		0.08		0.38		0.22		1.11		0.27		0.67	b	9.04
1958	1.90		1.85		0.74		0.75		0.18		0.63		0.10		0.14		0.16		0.62		1.97		0.62		9.66
1959	1.99		1.21		0.53		0.15		0.87		0.30		0.00		0.02		1.07		0.56		0.68		0.64		8.02
1960	0.75		1.71		0.30		0.72		1.00		0.00		0.02		0.18		0.34		0.11		1.71		1.47		8.31
1961	0.43		4.23		1.35		0.47		0.27		0.68		0.02		0.02		0.00		0.15		0.89		-----	z	8.51	a
1962	0.28		1.74		1.56		1.04		1.46		0.77		0.02		0.60		0.31		1.53		0.62		1.09		11.02
1963	0.11		1.45		1.01		1.62		0.17		0.26		0.28		0.00		0.09		0.01		2.15		1.20		8.35
1964	1.35		0.20		-----	z	0.83		0.15		1.48		0.10		0.07		0.35		0.12		1.56		1.72		7.93	a
1965	0.69		0.17		0.05		0.71		0.21		0.60		0.44		1.87		0.00		0.03		1.64		1.65		8.06
1966	0.96		0.12		1.31		0.05		0.22		0.91		0.46		0.05		0.59		0.29		1.78		2.01		8.75
1967	1.13		0.02		0.76		1.03		1.50		1.59		0.12		0.00		0.06		1.04		0.43		1.46		9.14
1968	2.68		0.86		0.30		0.55		0.56		0.14	a	0.00		1.58		0.06		1.00		1.44		2.38		11.55
1969	1.07		2.33		0.15		0.93		0.31		0.55		0.00		0.00		0.66		0.29		0.08		3.15		9.52
1970	2.55		0.47		0.74		0.35		0.27		0.11		0.04		0.09		0.13		0.45		1.58		2.99		9.77
1971	1.31		0.21		1.78		0.69		0.25		1.34		0.11		0.02		0.36		0.54		1.11		2.21		9.93
1972	0.40		0.54		1.19		0.38		1.94		1.54		-----	z	0.86		0.36		0.42		1.59		0.94		10.16	a
1973	0.80		0.24		0.18		0.00		0.34		-----	z	0.05		0.15		1.91		0.90		3.65		-----	z	8.22	b
1974	1.11		1.42		0.95		0.78		0.39		0.16		0.99		0.00		0.08		0.08		1.31		2.15		9.42
1975	0.94		1.50		1.27		1.45		0.29		0.44		0.34		1.71		0.08		1.85		0.35		1.00		11.22
1976	0.67		0.99		0.11		0.70		0.42		0.55		0.18		2.24		0.06		0.20		0.05		0.36		6.53
1977	0.02		-----	z	0.94		0.04		1.00		0.72		0.06		0.36		0.85		0.32		1.08		2.71		8.10	a
1978	2.06		1.42		1.18		1.53		0.34		0.14		1.15		1.33		0.99		0.00		0.17	c	0.27	a	10.58
1979	0.56		1.13		0.06		0.44		0.25		0.55		0.06		0.59		0.24		1.41		1.64		1.93		8.86
1980	1.46		3.00		0.55	a	0.90		2.38		1.57		0.02		0.09		1.30		0.38		1.07		1.74		14.46
1981	1.61		1.81		0.33		0.01		1.71		0.66		0.67		0.10		0.42		1.77		1.75		1.45		12.29
1982	0.65		0.94		1.54		0.60		0.75		0.35	a	0.93		0.42	a	0.55		0.82		1.82	a	2.77		12.14
1983	3.15		2.52		2.53		1.37		0.83	a	0.56		0.78		1.33		1.24		0.18		5.57		1.51	a	21.57
1984	0.32		1.31		1.36		0.97		0.99	a	2.45		0.07		0.09		0.36		0.33		3.38		0.52		12.15
1985	0.53		0.81		0.83		0.01		0.36		0.20		0.00		0.05		0.82		0.50		0.61		0.89		5.61
1986	2.86		0.89		0.64		-----	z	0.10		0.10		0.13		0.00		2.65		0.36		0.56		0.58		8.87	a
1987	1.62		0.80		1.58	a	0.12		0.34		1.35		1.78		0.46		0.00		0.05		0.69		3.51		12.30
1988	0.54		0.03	t	0.24		0.70		0.72		1.45		0.10		0.01		0.08		0.03		1.78		0.83		6.48	a
1989	0.05		1.34		1.42		0.56		2.12		0.07		0.14		0.30		0.00		0.75		0.78		0.21	a	7.74
1990	1.35		0.42		0.43		0.52		2.60		1.13		0.96		0.89		0.00		0.61		0.24		0.44	i	9.15	a
1991	0.44	a	0.47		-----	z	0.33		2.05		1.42		0.46		0.10		0.00		0.50		2.19		0.34		8.30	a
1992	0.80		0.40		0.16		0.84		0.01		1.62		2.28		0.08		0.14		0.49		1.13		2.19		10.14
1993	0.96	a	0.59		0.35		1.67		0.37		1.67		3.08		0.34		0.16		0.02		0.25	a	2.91		12.37
1994	0.48		0.85		0.22		1.39		0.69		0.80		0.01		0.53		0.00		0.35		2.17		1.59	a	9.08
1995	4.26		0.28		2.77		0.56		0.49		1.15		0.21		0.18		0.32		0.36		1.98		2.76		15.32
1996	1.29		1.54		0.46		0.46		1.26		0.23		0.23		0.00		0.50		0.38		1.03		5.18		12.56
1997	0.88		0.70		1.02		0.81		1.21		1.23		0.88		0.19		0.62		1.55		1.14		0.39		10.62
1998	2.81		2.25		1.66		0.67		2.08		0.41		1.36		0.04		0.26		0.72		1.72		2.06		16.04
1999	1.93		1.94		0.82		0.06		0.82		0.86		0.13		0.67		0.00		0.51		1.11		0.95		9.80
2000	1.61		1.53		1.34		0.16		0.41		0.22		0.69		0.00		0.04		0.41		1.16		1.06		8.63
2001	0.30		0.68		0.85		0.08		0.14		0.94		0.17		0.07		0.12		0.52		2.40		1.67		7.94
2002	0.87		0.79		0.44		0.21		0.37		0.45		0.20		0.07		0.21		0.06		0.85		3.24		7.76
2003	2.99		0.42		0.35		1.19		1.03		0.56		0.00		0.00		0.18		0.54		0.22		1.60		9.08
2004	0.94		1.49		0.36		0.13	a	1.28		0.70		0.40		0.58		0.10		1.01		0.12		2.72		9.83
2005	2.72	c	0.00	a	0.05	b	0.44		2.34		0.59		0.20		0.05		0.03		1.44		2.46		2.96		13.28
2006	2.77		1.06		0.70		0.60		1.14		0.50		0.03	b	0.00		0.00		0.58		1.29	a	2.84	a	11.51
2007	0.35		2.16		0.02		0.00		0.50		0.65		0.38		0.00		0.65		0.25		0.39		2.49		7.84
2008	0.91	f	0.41		2.29		0.06		0.20		1.40		0.11		0.83		0.04		0.54		1.42		1.40		8.70	a
2009	0.76		1.52	a	0.80		0.25		0.74		0.38		0.18		0.07		0.43		1.38		0.51		1.33		8.35
2010	2.13		1.81		0.22		0.97		1.21		1.70		0.24		0.61		1.60		0.82		1.40		1.90		14.61
2011	0.74		0.55		2.71		0.11		2.65		0.92		0.59		0.00		0.07	a	0.92		0.30		0.92		10.48
2012	1.28		1.20		1.91		0.69		0.39		1.79		0.75		0.00	a	0.00		1.45	a	1.13	b	2.61	a	13.20
2013	0.38		0.05		0.96		0.71	c	0.69	c	0.67		0.43		0.81		0.92	d	0.10		0.86	a	0.02		6.60
2014	0.33	a	1.32		0.95		0.69		0.17	c	0.40		0.00		1.10		0.34		1.10		1.67		1.96		10.03
2015	0.94		0.84	c	1.01		0.30	b	1.00	a	0.37	a	0.07		0.00		0.00	a	0.70		0.70		0.96	t	5.93	a
2016	3.22		0.55	i	3.00		0.60		0.71		1.46		0.65		0.00	j	0.00	d	3.80	b	1.11		2.37		16.92	b
2017	1.81	a	2.34		1.74	a	2.31		0.66		0.58	a	0.00	k	0.00	l	0.00	h	1.01	c	1.68	e	0.82	g	12.13	d
2018	2.46	b	0.03	b	1.74		1.31		0.52		0.25		0.00		0.01		0.20		1.17		0.82		1.50		10.01
2019	1.15		0.55		0.90		0.59		1.24		0.15		0.09		0.09		2.34		0.26		0.32		1.18		8.86
2020	2.01		0.07		0.25		0.11		0.72		0.58		0.01		0.00		0.50		1.21		-----	z	-----	z	5.46	b
Period of Record Statistics
MEAN	1.34		1.03		0.93		0.62		0.83		0.83		0.37		0.38		0.40		0.69		1.26		1.66		10.40
S.D.	0.91		0.80		0.71		0.49		0.67		0.58		0.56		0.54		0.54		0.65		0.91		1.00		2.71
SKEW	0.85		1.25		0.96		0.87		1.10		0.67		2.67		1.67		2.28		1.90		1.80		0.71		1.44
MAX	4.26		4.23		3.00		2.31		2.65		2.45		3.08		2.24		2.65		3.80		5.57		5.18		21.57
MIN	0.02		0.00		0.02		0.00		0.01		0.00		0.00		0.00		0.00		0.00		0.05		0.02		5.61
YRS	70		68		69		70		71		69		69		68		70		72		71		66		55