WINTHROP 1 WSW, WASHINGTON

Monthly Total Snowfall (Inches)

(459376)

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 11.50 k 3.50 f 0.50 g 0.00 n 0.00 b 0.00 c 0.00
1931-32 0.00 0.00 0.00 i 0.00 i 8.50 35.50 e 6.50 d 1.50 b 0.00 h 0.00 0.00 g 0.00 a 52.00
1932-33 0.00 0.00 0.00 d 0.00 h 11.00 a 19.50 b 14.50 e 6.00 3.00 a 0.00 b 0.00 f 0.00 c 54.00
1933-34 0.00 0.00 i 0.00 i 7.50 d 2.00 e 32.00 f 22.00 1.00 k 3.00 f 0.00 0.00 0.00 31.50
1934-35 0.00 b 0.00 b 0.00 f 4.00 11.00 25.00 61.00 8.00 12.50 0.00 0.00 0.00 f 121.50
1935-36 0.00 f 0.00 0.00 0.00 7.00 15.00 32.00 20.00 1.00 0.00 0.00 0.00 75.00
1936-37 0.00 0.00 0.00 0.00 0.00 13.20 21.20 24.70 10.30 1.00 0.00 0.00 70.40
1937-38 0.00 0.00 0.00 0.00 18.00 27.10 0.00 z 1.40 q 7.30 0.00 0.00 0.00 52.40
1938-39 0.00 0.00 0.00 0.00 4.80 11.10 a 5.60 12.90 4.20 e 0.00 b 0.00 0.00 38.60
1939-40 0.00 0.00 0.00 3.00 0.00 19.50 a 14.60 23.00 2.00 0.00 0.00 0.00 62.10
1940-41 0.00 0.00 0.00 0.00 14.60 21.60 14.70 0.10 0.00 0.00 0.00 0.00 51.00
1941-42 0.00 0.00 0.00 0.00 0.50 33.00 12.30 12.30 0.00 0.00 0.00 0.00 58.10
1942-43 0.00 0.00 0.00 0.00 25.20 43.30 19.00 18.50 2.00 0.00 0.00 c 0.00 108.00
1943-44 0.00 0.00 h 0.00 1.60 2.20 3.80 6.60 a 20.90 1.60 0.00 0.00 0.00 36.70
1944-45 0.00 0.00 0.00 0.00 6.10 4.90 a 9.60 d 18.20 1.60 3.30 e 0.00 0.00 43.70
1945-46 0.00 0.00 0.00 3.10 29.30 32.20 34.30 18.10 1.00 f 0.00 0.00 0.00 117.00
1946-47 0.00 0.00 0.00 1.00 37.30 18.20 15.80 18.50 0.50 0.00 b 0.00 0.00 91.30
1947-48 0.00 0.00 z 0.00 0.00 1.50 4.00 9.50 22.60 2.70 0.00 0.00 0.00 a 40.30
1948-49 0.00 0.00 0.00 0.50 28.80 48.60 5.20 39.80 3.40 0.00 0.00 0.00 126.30
1949-50 0.00 0.00 0.00 0.00 2.80 19.50 24.50 14.70 a 7.10 c 0.00 0.00 0.00 68.60
1950-51 0.00 a 0.00 0.00 0.50 30.80 18.60 41.50 a 13.60 25.10 0.00 0.00 0.00 130.10
1951-52 0.00 0.00 0.00 0.00 a 12.80 32.90 46.60 13.20 0.60 0.00 0.00 0.00 106.10
1952-53 0.00 0.00 0.00 0.00 0.00 35.30 46.90 13.10 1.50 0.00 0.00 0.00 96.80
1953-54 0.00 0.00 0.00 0.00 8.10 13.60 55.80 8.80 a 4.00 0.00 0.00 0.00 90.30
1954-55 0.00 0.00 0.00 0.00 1.50 28.40 12.10 14.80 14.20 4.50 0.00 0.00 75.50
1955-56 0.00 0.00 0.00 4.00 38.70 58.20 a 31.80 25.40 5.80 a 0.50 0.00 0.00 164.40
1956-57 0.00 0.00 0.00 a 0.00 11.80 4.30 18.70 12.20 8.40 0.00 0.00 0.00 55.40
1957-58 0.00 0.00 0.00 4.10 0.50 34.30 24.90 4.50 0.80 0.00 0.00 0.00 69.10
1958-59 0.00 0.00 0.00 0.00 b 28.80 19.70 37.90 28.00 1.70 0.00 0.00 0.00 116.10
1959-60 0.00 0.00 0.00 1.80 6.50 6.60 12.00 21.80 7.50 0.00 0.00 0.00 56.20
1960-61 0.00 0.00 0.00 0.00 19.90 7.60 16.30 16.80 13.30 0.00 0.00 0.00 73.90
1961-62 0.00 0.00 0.00 1.20 16.00 33.20 3.60 4.20 6.60 3.60 0.00 0.00 68.40
1962-63 0.00 0.00 0.00 0.00 8.90 14.60 0.30 4.00 0.00 0.00 0.00 0.00 27.80
1963-64 0.00 0.00 0.00 0.00 7.90 24.00 50.10 2.40 2.40 0.00 0.00 0.00 86.80
1964-65 0.00 z 0.00 0.00 0.00 13.70 37.70 24.80 3.30 0.00 0.00 0.00 0.00 79.50
1965-66 0.00 0.00 0.00 0.00 14.00 31.30 41.00 4.00 11.00 0.00 0.00 0.00 101.30
1966-67 0.00 0.00 0.00 0.00 7.10 10.60 16.50 2.50 4.00 0.00 0.00 0.00 40.70
1967-68 0.00 0.00 0.00 0.00 0.50 20.30 a 23.00 3.00 0.00 z 0.00 0.00 0.00 b 46.80
1968-69 0.00 0.00 0.00 0.00 3.50 62.20 38.50 26.30 2.00 0.00 0.00 0.00 132.50
1969-70 0.00 0.00 0.00 0.00 0.00 34.00 44.10 5.00 0.00 z 0.00 0.00 0.00 83.10
1970-71 0.00 0.00 0.00 0.00 19.00 59.00 33.50 7.50 18.30 0.00 0.00 0.00 z 137.30
1971-72 0.00 0.00 0.00 3.00 17.60 62.80 31.30 6.50 b 17.50 2.00 0.00 0.00 z 140.70
1972-73 0.00 0.00 0.00 0.50 2.10 0.00 z 14.70 5.00 0.00 0.00 z 0.00 z 0.00 z 22.30
1973-74 0.00 0.00 0.00 0.00 16.70 52.10 17.00 10.00 2.50 0.00 z 0.00 0.00 98.30
1974-75 0.00 0.00 0.00 0.00 0.00 z 21.10 35.70 21.20 0.00 z 0.00 0.00 0.00 78.00
1975-76 0.00 0.00 0.00 0.00 11.30 12.90 b 20.80 9.70 0.00 0.00 0.00 0.00 54.70
1976-77 0.00 0.00 0.00 0.00 0.00 0.00 z 0.80 3.50 0.00 0.00 0.00 0.00 4.30
1977-78 0.00 0.00 0.00 0.00 14.00 33.50 13.40 5.30 1.50 0.00 0.00 0.00 67.70
1978-79 0.00 0.00 0.00 0.00 3.10 7.10 6.10 18.00 0.00 0.00 0.00 0.00 34.30
1979-80 0.00 0.00 0.00 0.00 0.00 b 27.30 19.60 11.10 0.00 0.00 0.00 0.00 58.00
1980-81 0.00 0.00 0.00 0.00 6.50 24.50 3.00 2.00 0.00 0.00 0.00 0.00 36.00
1981-82 0.00 0.00 0.00 0.00 0.90 33.50 19.80 10.30 3.00 0.00 0.00 0.00 z 67.50
1982-83 0.00 0.00 0.00 0.00 11.60 25.70 29.50 5.00 0.00 0.00 0.00 0.00 71.80
1983-84 0.00 0.00 0.00 0.00 12.30 19.10 6.90 5.00 0.00 0.00 0.00 0.00 43.30
1984-85 0.00 0.00 0.00 0.00 22.70 11.00 3.80 12.00 b 6.00 0.00 0.00 0.00 55.50
1985-86 0.00 0.00 0.00 3.80 4.60 8.50 17.30 16.30 0.00 0.00 0.00 0.00 50.50
1986-87 0.00 0.00 0.00 0.00 5.50 14.50 24.00 14.00 3.50 0.00 0.00 0.00 61.50
1987-88 0.00 0.00 0.00 0.00 0.00 32.30 12.20 2.00 1.50 0.00 0.00 0.00 48.00
1988-89 0.00 0.00 0.00 0.00 10.00 12.80 3.30 17.70 9.40 0.00 0.00 0.00 53.20
1989-90 0.00 0.00 0.00 0.00 2.00 1.00 21.50 5.50 0.00 0.00 0.00 0.00 30.00
1990-91 0.00 z 0.00 0.00 0.00 3.50 17.60 8.00 0.00 7.20 0.00 0.00 0.00 36.30
1991-92 0.00 0.00 0.00 5.10 11.30 13.00 10.00 a 2.00 0.00 0.00 0.00 0.00 41.40
1992-93 0.00 0.00 0.00 0.00 5.70 25.70 14.50 6.00 0.50 0.00 0.00 0.00 52.40
1993-94 0.00 0.00 0.00 0.00 1.60 a 23.60 9.30 10.20 0.50 0.00 a 0.00 0.00 45.20
1994-95 0.00 0.00 0.00 5.40 21.00 16.90 25.40 7.30 5.60 0.00 0.00 0.00 81.60
1995-96 0.00 0.00 0.00 0.00 29.00 23.80 a 19.30 d 13.10 0.30 0.00 0.00 0.00 85.50
1996-97 0.00 0.00 0.00 b 6.00 19.80 b 76.80 16.20 6.90 10.80 0.00 a 0.00 0.00 136.50
1997-98 0.00 0.00 0.00 0.10 4.50 9.60 37.00 0.30 5.00 0.00 0.00 0.00 56.50
1998-99 0.00 0.00 0.00 0.00 6.50 21.10 15.70 20.20 10.20 0.00 0.00 b 0.00 73.70
1999-00 0.00 0.00 0.00 3.00 0.30 12.30 21.20 19.00 0.00 a 0.00 0.00 0.00 55.80
2000-01 0.00 0.00 0.00 0.00 7.80 13.60 5.50 8.80 0.20 0.00 0.00 a 0.00 35.90
2001-02 0.00 0.00 0.00 0.00 9.10 26.70 13.20 10.80 6.80 0.00 0.00 0.00 66.60
2002-03 0.00 0.00 0.00 0.00 0.00 24.10 21.90 0.00 1.80 a 0.00 b 0.00 0.00 47.80
2003-04 0.00 0.00 0.00 0.00 13.30 24.50 a 5.90 6.20 3.50 0.00 0.00 0.00 53.40
2004-05 0.00 0.00 z 0.00 0.00 3.70 18.90 18.60 b 0.00 0.00 0.00 0.00 0.00 a 41.20
2005-06 0.00 0.00 0.00 0.00 0.00 z 14.30 30.40 a 9.10 1.00 0.00 0.00 0.00 a 54.80
Period of Record Statistics
MEAN 0.00 0.00 0.00 0.81 10.12 24.22 20.56 11.15 4.13 0.20 0.00 0.00 69.93
S.D. 0.00 0.00 0.00 1.70 9.63 15.32 13.68 8.18 5.18 0.80 0.00 0.00 30.41
SKEW 0.00 0.00 0.00 2.15 1.11 1.21 0.86 0.81 1.77 4.17 0.00 0.00 1.10
MAX 0.00 0.00 0.00 7.50 38.70 76.80 61.00 39.80 25.10 4.50 0.00 0.00 164.40
MIN 0.00 0.00 0.00 0.00 0.00 1.00 0.30 0.00 0.00 0.00 0.00 0.00 27.80
NO YRS 72 71 72 73 73 72 74 73 69 73 73 71 53