CHIEF JOSEPH DAM, WA

Total of Snowfall (Inches)

(451400)

File last updated on March 29, 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)JULAUGSEPOCTNOVDECJANFEBMARAPRMAYJUNANN
1949-50-----z-----z-----z0.00 0.00 1.60b22.50 7.50 0.00 0.00 0.00 0.00 31.60c
1950-510.00 0.00 0.00 0.00 0.00b0.00f12.90a4.60 9.00 0.00 0.00 0.00 26.50a
1951-520.00 0.00 0.00 0.00 1.00 0.00e24.40g4.00 0.00 0.00 0.00 0.00 5.00a
1952-530.00 0.00 0.00 0.00 0.00 -----z-----z-----z-----z-----z-----z-----z0.00g
1953-54-----z-----z-----z-----z-----z-----z-----z0.00a0.00 0.00 0.00 0.00 0.00g
1954-550.00 -----z0.00 0.00 0.50 0.60 9.00 0.80 0.00 2.00 0.00 0.00 12.90a
1955-560.00 0.00 0.00 0.00 13.80 22.80b14.00 6.40b0.50 0.00 0.00 -----z57.50a
1956-570.00 0.00 0.00 0.00 0.00d0.00d11.40b6.20 4.50 0.00 0.00 0.00 22.10
1957-580.00 0.00 0.00 0.00 0.00 2.00 0.00b0.00 0.00x0.00 0.00 0.00 2.00a
1958-590.00 0.00 0.00 0.00 0.00d0.00g4.00d0.00u0.00 0.00 0.00 0.00 4.00b
1959-600.00 0.00 0.00 0.00 1.40 1.80 4.90 1.50b5.10 0.00 0.00 0.00 14.70
1960-610.00 0.00 0.00 0.00 0.00c10.30 0.00b0.00c2.50 0.00 0.00 0.00 12.80
1961-620.00 0.00 0.00 0.00 9.10 -----z0.00 0.80 9.50b0.00 0.00 0.00 19.40a
1962-630.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1963-640.00 0.00 0.00 0.00 0.00 -----z-----z0.00 -----z0.00 0.00 0.00 0.00c
1964-650.00 0.00 0.00 0.00 -----z-----z-----z-----z-----z-----z-----z-----z0.00h
1965-66-----z0.00 -----z0.00b0.00 18.00 -----z-----z-----z-----z-----z-----z18.00h
1966-670.00 -----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z0.00k
1967-68-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z0.00l
1968-69-----z-----z0.00 -----z-----z-----z-----z-----z-----z-----z-----z-----z0.00k
1969-70-----z-----z-----z-----z-----z-----z-----z0.00 0.00 0.00 0.00 0.00 0.00g
1970-710.00 0.00 -----z-----z-----z-----z-----z-----z-----z0.00 0.00 0.00 0.00g
1971-720.00 0.00 0.00 1.80 0.00 -----z-----z-----z-----z-----z0.00 0.00 1.80e
1972-73-----z0.00 0.00 -----z-----z5.30 -----z-----z0.00 0.00 0.00 -----z5.30f
1973-740.00 0.00 0.00 0.00 -----z-----z-----z-----z0.00 0.00 0.00 0.00 0.00d
1974-750.00 0.00 0.00 0.00 0.00 -----z-----z-----z-----z0.00 0.00 0.00 0.00d
1975-760.00 0.00 0.00 -----z-----z-----z-----z-----z-----z0.00 0.00 0.00 0.00f
1976-770.00 0.00 0.00 0.00 0.00 3.00 0.50 -----z0.00 0.00 0.00 0.00 3.50a
1977-780.00 0.00 0.00 0.00 0.00b14.50c6.30 4.50 0.00 0.00 0.00 0.00 25.30
1978-790.00 0.00 0.00 0.00 1.00c3.50a4.00d9.00 0.00 0.00 0.00 0.00 17.50
1979-800.00 0.00 0.00 0.00 4.00 14.00 8.00 5.80n0.00a0.00 0.00 0.00 26.00a
1980-810.00 0.00 0.00 0.00 0.00b-----z0.00c0.00 0.00 0.00 0.00 0.00 0.00a
1981-820.00 0.00 0.00 0.00 0.00 12.30 7.40b0.00a0.00 0.00 0.00 0.00b19.70
1982-830.00 0.00 0.00 0.00 6.50a12.30b6.80 5.50 0.00 0.00 0.00a0.00 31.10
1983-840.00 0.00 0.00 0.00 0.00 32.80a-----z5.10 0.00 0.00 0.00 0.00 37.90a
1984-850.00 0.00 0.00 0.00 10.50 7.30b5.00 9.00 0.00 0.00 0.00 0.00 31.80
1985-860.00 0.00 0.00 0.00 12.50 12.00 22.20 6.80 0.00 0.00 0.00 0.00 53.50
1986-870.00 0.00 0.00 0.00 0.00 3.30 10.10 1.00 0.00 0.00 0.00 0.00 14.40
1987-880.00 0.00 0.00 0.00 0.00 11.10 6.30 0.00 0.00 0.00 0.00 0.00 17.40
1988-890.00 0.00 0.00 0.00 -----z10.00 0.40 17.50 5.80 0.00 0.00 0.00 33.70a
1989-900.00 0.00 0.00 0.00 0.00 0.30 1.50 5.50 0.00 0.00 0.00 0.00 7.30
1990-910.00 0.00 0.00 0.00 0.00 1.00j1.80c0.00 -----z0.00 0.00 0.00 1.80b
1991-920.00 0.00 0.00 1.80a0.00c1.30b1.80 0.00 0.00 0.00 0.00 0.00 4.90
1992-930.00 0.00 0.00 0.00 1.00 12.20f16.80b8.00 2.00 0.00 0.00 0.00 27.80a
1993-940.00 0.00 0.00 0.00 2.00b22.30 7.00 -----z0.00a0.00 0.00 0.00 31.30a
1994-950.00 0.00 0.00 0.00 8.10 10.30a10.10a2.00 0.00 0.00 0.00 0.00 30.50
1995-960.00 0.00 0.00 0.00 5.60 12.50 16.70 6.90a0.00c0.00 0.00 0.00 41.70
1996-970.00 0.00 0.00 0.00a10.30a37.50 6.70 5.00 6.90a0.00 0.00 0.00 66.40
1997-980.00 0.00 0.00 0.00 0.00 3.40 19.20 0.00 0.00 0.00 0.00 0.00 22.60
1998-990.00 0.00 0.00 0.00 0.00 19.00 7.60 4.30 0.00 0.00 0.00 0.00 30.90
1999-000.00 0.00 0.00 0.00 0.00 5.00 15.80 4.00 0.00 0.00 0.00 0.00 24.80
2000-010.00 0.00 0.00 0.00 5.20 13.80a2.10 7.90 0.00 0.00 0.00 0.00 29.00
2001-020.00 0.00 0.00 0.00 3.00 16.40 1.80 3.30 4.00 0.00 0.00 0.00 28.50
2002-030.00 0.00 0.00 0.00 0.00 13.10 15.60 0.00 1.10 0.00 0.00 0.00 29.80
2003-040.00 0.00 0.00 0.00 0.50 16.60 9.40 2.20 0.30 0.00 0.00 0.00 29.00
2004-050.00 0.00 0.00 0.00 0.00 4.20 2.30e0.00a0.00 0.00 0.00 0.00 6.50
2005-060.00 0.00 0.00 0.00 6.30 9.60 1.00a0.30 0.00 0.00 0.00 0.00 17.20
2006-070.00 0.00 0.00 0.00 8.50b16.00 1.80a3.80b0.80 0.00 0.00 0.00 30.90
2007-080.00 0.00 0.00 0.00 2.50 21.00a13.60q4.10 4.60 0.20 0.00 0.00 32.40a
2008-090.00 0.00 0.00 0.00 0.00 26.90 11.10 1.40a0.00 0.00 0.00 0.00 39.40
2009-100.00 0.00 0.00 0.00 0.00 1.30b1.80 0.00 0.00 0.00 0.00 0.00 3.10
2010-110.00 0.00 0.00 0.00 8.00 14.20 2.00 2.00 2.00p-----z-----z-----z26.20d
2011-12-----z-----z-----z-----z-----z-----z1.60w2.00v-----z-----z-----z0.00y0.00l
2012-130.00y-----z0.00w-----z-----z11.90u-----z-----z-----z-----z-----z-----z0.00l
2013-140.00 -----z-----z0.00 0.00a0.00 4.10a7.30 0.00a-----z-----z0.00 11.40d
2014-150.00 0.00 0.00 0.00a-----z0.10 5.20y-----z-----z-----z-----z0.00j0.10g
2015-160.00 0.00b0.00b0.00 0.00 -----z-----z0.00n0.00 0.00 0.00 0.00 0.00c
2016-170.00b0.00j0.00d0.00a0.00a11.00a9.10c7.90 0.00 0.00 0.00 -----z28.00b
2017-18-----z-----z-----z-----z-----z2.90y-----z-----z0.00 0.00 0.00 0.00 0.00h
2018-19-----z-----z0.00 0.00 0.00 -----z-----z-----z-----z0.00 0.00 0.00 0.00f
2019-200.00 0.00 0.00 0.00 -----z-----z-----z0.00 0.00 0.00 0.00 -----z0.00d
2020-210.00 0.00 0.00 0.00 -----z-----z-----z-----z-----z-----z-----z-----z0.00h
Period of Record Statistics
MEAN0.00 0.00 0.00 0.06 2.21 10.31 7.02 3.39 1.07 0.04 0.00 0.00 24.23
S.D.0.00 0.00 0.00 0.32 3.75 9.02 6.25 3.66 2.35 0.26 0.00 0.00 14.63
SKEW0.00 0.00 0.00 5.25 1.62 0.93 0.84 1.30 2.29 7.38 0.00 0.00 0.76
MAX0.00 0.00 0.00 1.80 13.80 37.50 22.50 17.50 9.50 2.00 0.00 0.00 66.40
MIN0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
YRS61 59 61 61 55 46 46 49 53 59 60 57 29