DIABLO DAM, WASHINGTON

Monthly Total Snowfall (Inches)

(452157)

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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) JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN ANN
1930-31 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1931-32 0.00 0.00 0.00 0.00 20.00 12.00 a 25.80 16.10 15.20 0.00 0.00 0.00 89.10
1932-33 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1933-34 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 9.60 0.00 3.00 0.00 z 0.00 0.00 12.60
1934-35 0.00 0.00 0.00 0.00 0.00 36.00 81.00 0.00 20.00 0.00 0.00 0.00 137.00
1935-36 0.00 0.00 0.00 0.00 6.50 0.00 46.00 67.80 15.00 0.00 0.00 0.00 135.30
1936-37 0.00 0.00 0.00 0.00 0.00 5.00 48.50 69.00 0.00 0.00 0.00 0.00 122.50
1937-38 0.00 0.00 0.00 0.00 17.50 56.00 16.50 9.50 29.00 0.00 0.00 0.00 128.50
1938-39 0.00 0.00 0.00 0.00 8.00 39.30 17.20 26.00 19.50 0.00 0.00 0.00 110.00
1939-40 0.00 0.00 0.00 1.00 0.00 0.00 6.00 4.50 0.00 0.00 0.00 0.00 11.50
1940-41 0.00 0.00 0.00 0.00 0.00 4.80 5.10 4.50 0.00 0.00 0.00 0.00 14.40
1941-42 0.00 0.00 0.00 0.00 0.00 12.00 1.00 0.70 2.50 0.00 0.00 0.00 16.20
1942-43 0.00 0.00 0.00 0.00 5.30 32.90 62.30 b 19.50 4.00 0.00 0.00 0.00 124.00
1943-44 0.00 0.00 0.00 0.00 0.00 0.00 17.00 3.50 14.00 0.00 0.00 0.00 34.50
1944-45 0.00 0.00 0.00 a 0.00 0.00 1.00 2.80 0.00 3.00 9.50 0.00 0.00 16.30
1945-46 0.00 0.00 0.00 0.00 6.00 3.00 28.40 14.80 0.20 1.50 0.00 0.00 53.90
1946-47 0.00 0.00 0.00 0.00 25.00 12.50 38.50 18.00 0.00 0.00 0.00 0.00 94.00
1947-48 0.00 0.00 b 0.00 0.00 0.00 9.00 8.50 22.00 3.30 0.00 0.00 0.00 42.80
1948-49 0.00 0.00 0.00 0.00 20.50 39.00 9.50 66.90 1.00 0.00 0.00 0.00 136.90
1949-50 0.00 0.00 0.00 0.00 1.20 16.50 b 48.00 5.00 f 1.00 b 0.00 0.00 0.00 66.70
1950-51 0.00 0.00 0.00 0.00 0.00 d 3.50 3.00 j 4.00 a 21.50 0.00 0.00 0.00 29.00
1951-52 0.00 0.00 0.00 0.00 0.00 77.50 43.40 0.50 0.00 0.00 0.00 0.00 121.40
1952-53 0.00 0.00 0.00 0.00 0.00 0.00 s 20.00 3.50 0.00 0.00 0.00 0.00 23.50
1953-54 0.00 0.00 0.00 0.00 0.00 0.00 z 44.00 w 25.00 0.00 c 0.00 0.00 0.00 25.00
1954-55 0.00 0.00 0.00 0.00 0.00 7.00 3.50 d 18.30 33.50 0.00 0.00 0.00 62.30
1955-56 0.00 0.00 0.00 0.00 3.00 z 16.00 m 11.50 13.00 d 8.00 e 0.00 0.00 0.00 32.50
1956-57 0.00 0.00 0.00 0.00 a 2.00 0.00 k 27.50 c 32.00 7.50 0.00 0.00 0.00 69.00
1957-58 0.00 0.00 0.00 0.00 0.00 a 0.00 m 1.00 0.00 0.00 a 0.00 0.00 0.00 1.00
1958-59 0.00 0.00 0.00 0.00 0.00 s 18.00 0.00 g 6.00 0.00 c 0.00 0.00 0.00 24.00
1959-60 0.00 0.00 0.00 0.00 8.00 0.50 20.00 3.00 18.00 2.50 0.00 0.00 52.00
1960-61 0.00 0.00 0.00 0.00 3.00 1.00 16.30 0.00 2.00 a 0.00 0.00 0.00 22.30
1961-62 0.00 0.00 0.00 0.00 a 7.00 12.00 j 19.00 0.00 14.70 0.00 0.00 0.00 40.70
1962-63 0.00 0.00 0.00 0.00 0.00 d 0.00 0.00 z 0.00 b 0.00 0.00 0.00 0.00 0.00
1963-64 0.00 0.00 0.00 0.00 5.00 0.00 z 35.00 0.00 1.00 0.00 0.00 0.00 41.00
1964-65 0.00 0.00 0.00 0.00 8.00 47.00 24.50 0.00 z 0.00 0.00 0.00 0.00 79.50
1965-66 0.00 z 0.00 0.00 0.00 0.00 39.00 14.00 0.00 z 7.00 0.00 0.00 0.00 60.00
1966-67 0.00 0.00 0.00 0.00 1.50 3.30 0.00 z 4.50 0.00 z 0.00 0.00 0.00 9.30
1967-68 0.00 0.00 0.00 0.00 4.00 25.00 26.40 b 0.00 0.70 0.00 0.00 0.00 56.10
1968-69 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 z 8.60 2.00 0.00 0.00 0.00 10.60
1969-70 0.00 0.00 0.00 0.00 0.00 1.00 42.00 0.00 0.00 0.00 0.00 0.00 43.00
1970-71 0.00 0.00 0.00 0.00 11.60 34.80 31.90 b 0.00 z 9.00 b 0.00 0.00 0.00 87.30
1971-72 0.00 0.00 0.00 0.00 a 0.00 15.30 f 36.50 7.00 9.50 0.00 0.00 0.00 53.00
1972-73 0.00 0.00 0.00 0.00 0.00 19.50 0.00 z 6.00 0.00 0.00 0.00 0.00 25.50
1973-74 0.00 0.00 0.00 0.00 14.00 2.00 18.00 4.30 3.50 0.00 0.00 0.00 41.80
1974-75 0.00 0.00 0.00 0.00 0.00 4.00 e 33.50 24.40 0.30 0.00 0.00 0.00 62.20
1975-76 0.00 0.00 0.00 0.00 0.00 z 0.00 z 34.00 0.00 z 0.00 z 0.00 a 0.00 0.00 34.00
1976-77 0.00 0.00 0.00 0.00 0.00 0.00 10.00 1.00 0.50 0.00 0.00 0.00 11.50
1977-78 0.00 0.00 0.00 0.00 0.00 z 26.60 b 19.00 b 19.00 0.00 0.00 0.00 0.00 64.60
1978-79 0.00 0.00 0.00 0.00 2.00 8.40 b 13.10 d 20.60 0.00 0.00 a 0.00 0.00 44.10
1979-80 0.00 0.00 0.00 0.00 0.00 8.00 11.00 b 12.30 3.50 0.00 0.00 0.00 34.80
1980-81 0.00 0.00 0.00 0.00 0.00 15.30 0.50 7.00 0.00 0.00 0.00 0.00 22.80
1981-82 0.00 0.00 0.00 0.00 0.00 5.50 57.00 31.30 0.00 z 0.00 a 0.00 0.00 93.80
1982-83 0.00 0.00 0.00 0.00 1.00 1.00 7.00 1.00 0.40 0.00 0.00 0.00 10.40
1983-84 0.00 0.00 0.00 0.00 0.00 17.50 1.00 0.40 0.00 0.00 0.00 0.00 18.90
1984-85 0.00 0.00 0.00 1.00 9.00 0.00 z 0.00 z 37.00 0.00 z 0.00 0.00 0.00 47.00
1985-86 0.00 0.00 0.00 0.00 14.00 6.70 3.50 9.50 a 0.00 0.00 0.00 0.00 33.70
1986-87 0.00 0.00 0.00 0.00 0.00 0.00 3.50 b 2.00 5.00 0.00 0.00 0.00 10.50
1987-88 0.00 z 0.00 0.00 0.00 0.00 6.00 d 9.00 9.00 a 2.00 0.00 0.00 0.00 26.00
1988-89 0.00 0.00 0.00 0.00 4.00 0.00 23.50 b 7.00 4.00 0.00 b 0.00 0.00 38.50
1989-90 0.00 0.00 0.00 0.00 0.00 0.00 10.80 a 51.50 2.00 0.00 0.00 0.00 64.30
1990-91 0.00 0.00 0.00 0.00 0.00 37.00 30.00 0.00 14.00 0.00 0.00 0.00 81.00
1991-92 0.00 0.00 0.00 0.00 0.00 0.00 0.00 b 0.00 a 0.00 0.00 0.00 0.00 0.00
1992-93 0.00 0.00 0.00 0.00 0.00 b 17.00 d 25.00 0.20 0.00 0.00 0.00 0.00 42.20
1993-94 0.00 0.00 0.00 0.00 0.00 a 0.00 0.00 25.00 1.00 0.00 0.00 0.00 26.00
1994-95 0.00 0.00 0.00 0.00 15.00 20.50 0.00 27.00 4.00 0.00 0.00 0.00 66.50
1995-96 0.00 0.00 0.00 0.00 0.00 5.00 35.00 a 12.00 1.30 0.00 0.00 0.00 53.30
1996-97 0.00 0.00 0.00 0.00 11.00 a 72.00 b 16.00 a 1.00 0.00 z 0.00 0.00 0.00 100.00
1997-98 0.00 0.00 0.00 z 0.00 0.00 a 2.50 23.50 0.00 b 0.00 a 0.00 0.00 0.00 26.00
1998-99 0.00 0.00 0.00 0.00 0.00 25.00 a 0.00 d 2.50 a 0.00 a 0.00 a 0.00 0.00 27.50
1999-00 0.00 0.00 0.00 0.00 0.00 4.30 a 32.00 4.50 0.00 a 0.00 0.00 0.00 40.80
2000-01 0.00 0.00 0.00 0.00 4.50 11.50 0.00 3.50 1.00 0.00 0.00 a 0.00 20.50
2001-02 0.00 0.00 0.00 0.00 2.00 18.80 27.30 0.30 a 30.00 a 0.00 0.00 0.00 78.40
2002-03 0.00 0.00 0.00 0.00 0.00 7.00 0.00 0.00 10.00 0.00 0.00 0.00 17.00
2003-04 0.00 0.00 0.00 0.00 6.50 24.00 16.50 0.00 0.00 0.00 0.00 0.00 47.00
2004-05 0.00 0.00 0.00 0.00 0.00 1.00 11.30 0.00 2.00 0.00 0.00 0.00 14.30
2005-06 0.00 0.00 0.00 0.00 1.00 4.50 3.00 4.50 5.00 0.00 0.00 0.00 z 18.00
Period of Record Statistics
MEAN 0.00 0.00 0.00 0.03 3.54 14.63 19.67 11.31 5.07 0.18 0.00 0.00 53.87
S.D. 0.00 0.00 0.00 0.16 5.86 17.69 17.24 16.22 7.92 1.15 0.00 0.00 39.98
SKEW 0.00 0.00 0.00 5.79 1.87 1.68 1.08 2.12 1.93 7.50 0.00 0.00 0.84
MAX 0.00 0.00 0.00 1.00 25.00 77.50 81.00 69.00 33.50 9.50 0.00 0.00 137.00
MIN 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
NO YRS 72 74 72 73 69 62 67 70 70 74 75 74 47