ROCK CREEK, o

Monthly Total Snowfall (Inches)

(357250)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201005
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
1919-20 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 8.00 0.00 0.00 z 8.00
1920-21 0.00 0.00 0.00 0.50 1.50 25.30 l 39.00 37.60 q 7.80 1.10 z 0.00 0.00 z 48.80
1921-22 0.00 0.00 0.00 0.00 24.80 12.60 w 24.80 o 37.60 m 40.10 l 8.40 w 0.00 0.00 24.80
1922-23 0.00 0.00 z 0.00 0.00 0.00 38.80 27.70 q 15.30 v 14.00 8.00 0.00 0.00 60.80
1923-24 0.00 z 0.00 0.00 1.00 2.00 19.00 18.10 t 6.80 19.60 s 2.30 0.00 2.00 33.10
1924-25 0.00 0.00 0.00 4.00 7.50 25.00 27.80 7.80 12.20 y 3.50 0.00 0.00 75.60
1925-26 0.00 0.00 0.00 0.00 4.00 13.50 a 20.60 q 22.70 o 7.20 z 2.50 0.00 0.00 20.00
1926-27 0.00 0.00 0.00 0.00 9.20 u 25.50 p 27.10 m 13.60 q 8.00 r 9.80 0.30 z 0.00 9.80
1927-28 0.00 0.00 0.00 z 0.00 9.50 32.50 15.50 7.80 14.20 q 7.90 u 0.00 z 0.00 z 65.30
1928-29 0.00 z 0.00 z 0.00 z 0.20 10.10 t 19.50 63.50 7.00 2.50 12.50 0.00 0.00 105.20
1929-30 0.00 0.00 z 0.50 0.00 1.00 19.80 26.00 21.00 2.30 0.00 0.00 0.00 z 70.60
1930-31 0.00 z 0.00 0.00 0.60 z 14.10 y 17.00 24.80 9.50 29.40 u 2.00 0.00 0.00 53.30
1931-32 0.00 0.00 z 0.00 0.50 30.70 49.80 k 38.60 n 24.90 p 21.90 l 0.80 0.00 0.00 z 32.00
1932-33 0.00 0.00 0.00 1.20 7.80 31.00 54.40 k 27.80 7.20 m 1.40 2.50 0.00 71.70
1933-34 0.00 0.00 z 3.50 0.00 1.00 22.80 4.00 0.60 w 2.30 z 6.00 0.00 0.00 37.30
1934-35 0.00 0.00 z 1.50 10.50 21.50 28.60 q 25.00 6.10 22.60 l 13.00 v 0.30 0.00 64.90
1935-36 0.00 0.00 0.00 4.80 z 9.30 v 11.60 v 57.40 k 35.20 m 17.40 q 8.50 1.00 0.00 9.50
1936-37 0.00 0.00 1.50 1.00 0.00 20.80 p 51.40 k 29.50 14.10 13.40 o 0.00 0.00 46.10
1937-38 0.00 0.00 0.00 0.00 3.50 18.10 v 30.30 45.30 35.20 l 1.50 0.50 0.00 81.10
1938-39 0.00 z 0.00 0.00 0.00 z 15.00 13.50 24.40 41.00 22.50 0.40 1.00 1.80 119.60
1939-40 0.00 z 0.00 0.00 4.00 0.00 4.50 22.50 q 49.70 2.00 0.00 0.00 0.00 60.20
1940-41 0.00 0.00 0.00 0.00 z 16.70 11.40 w 20.50 20.80 0.00 0.00 0.00 0.00 58.00
1941-42 0.00 z 0.00 0.00 0.00 0.20 20.50 13.00 26.50 5.50 4.00 0.00 0.00 69.70
1942-43 0.00 0.00 0.00 1.20 19.70 51.00 42.00 19.50 9.50 3.00 4.00 0.00 149.90
1943-44 0.00 0.00 0.00 9.50 1.00 12.00 9.50 26.50 14.70 5.50 0.00 0.00 78.70
1944-45 0.00 0.00 0.00 0.00 6.50 8.70 10.50 24.90 10.50 8.00 0.00 0.20 69.30
1945-46 0.00 0.00 0.00 0.20 32.30 22.70 26.00 18.50 10.00 0.60 0.00 0.00 110.30
1946-47 0.00 0.00 0.00 4.00 24.50 3.20 20.50 3.00 z 7.50 4.00 0.00 0.00 63.70
1947-48 0.00 0.00 0.00 z 0.00 20.50 20.50 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 41.00
1948-49 0.00 0.00 0.00 z 0.50 27.00 62.00 7.80 45.50 3.00 0.00 0.00 0.00 145.80
1949-50 0.00 0.00 0.00 0.00 1.50 24.00 47.00 17.50 18.50 7.00 1.00 0.50 117.00
1950-51 0.00 0.00 0.00 0.00 9.00 11.50 43.00 14.50 31.00 0.00 0.00 0.00 109.00
1951-52 0.00 0.00 0.00 5.00 14.50 49.10 56.40 24.40 14.00 0.00 0.00 0.00 163.40
1952-53 0.00 0.00 0.00 0.00 3.50 42.50 17.00 20.60 26.00 8.50 0.00 0.00 118.10
1953-54 0.00 0.00 0.00 0.00 13.00 30.50 31.70 8.00 13.00 0.00 0.00 0.00 96.20
1954-55 0.00 0.00 0.00 0.00 0.00 18.00 22.00 17.80 17.00 11.50 0.50 0.00 86.80
1955-56 0.00 0.00 0.00 1.50 27.00 35.10 41.00 36.60 9.70 2.50 0.00 0.00 153.40
1956-57 0.00 0.00 0.00 12.00 9.00 10.50 25.50 20.00 12.00 0.00 0.00 0.00 89.00
1957-58 0.00 0.00 0.00 0.00 6.00 a 23.00 38.00 12.00 9.50 6.00 0.00 0.00 94.50
1958-59 0.00 0.00 0.00 0.00 7.00 9.50 19.00 15.50 8.50 0.00 0.00 0.00 59.50
1959-60 0.00 0.00 0.00 1.00 3.50 8.50 26.00 28.50 14.00 7.00 2.00 0.00 90.50
1960-61 0.00 0.00 0.00 0.00 15.00 11.50 5.00 10.50 16.00 1.00 0.00 0.00 59.00
1961-62 0.00 0.00 0.00 6.50 21.50 20.50 22.00 16.00 17.00 5.50 1.00 0.00 110.00
1962-63 0.00 0.00 0.00 0.00 4.50 6.50 8.00 8.00 5.50 9.50 0.00 0.00 42.00
1963-64 0.00 0.00 0.00 0.00 12.50 16.50 40.50 14.50 24.50 3.00 0.00 0.00 111.50
1964-65 0.00 0.00 0.00 0.00 23.50 47.50 44.00 5.50 9.50 2.50 0.00 0.00 132.50
1965-66 0.00 0.00 0.00 0.00 4.00 14.00 24.50 25.50 10.00 0.00 0.50 0.00 78.50
1966-67 0.00 0.00 0.00 4.50 11.00 17.50 24.50 8.00 31.00 5.50 3.00 0.00 105.00
1967-68 0.00 0.00 0.00 0.00 7.50 21.50 27.50 6.50 1.00 2.00 0.00 0.00 z 66.00
1968-69 0.00 0.00 0.00 0.00 12.00 45.50 24.00 24.00 4.00 6.00 0.00 0.00 115.50
1969-70 0.00 0.00 0.00 2.00 2.50 29.50 23.50 3.00 24.00 0.00 0.00 0.00 84.50
1970-71 0.00 0.00 0.00 2.50 12.50 37.50 23.00 2.50 14.00 0.00 0.00 0.00 92.00
1971-72 0.00 0.00 0.00 4.00 25.50 51.00 33.00 13.50 6.50 1.00 0.00 0.00 134.50
1972-73 0.00 0.00 0.00 0.00 0.00 z 14.50 14.50 10.50 3.10 1.50 0.00 0.00 44.10
1973-74 0.00 0.00 0.00 0.00 38.60 39.50 d 16.80 18.90 5.50 2.50 4.50 0.00 126.30
1974-75 0.00 0.00 0.00 0.00 5.10 31.10 28.60 29.20 16.80 9.60 0.00 0.00 120.40
1975-76 0.00 0.00 0.00 5.00 19.10 i 8.90 31.80 9.10 13.80 1.70 0.00 0.00 70.30
1976-77 0.00 0.00 0.00 0.00 2.40 4.30 5.30 5.50 9.90 4.30 1.00 0.00 32.70
1977-78 0.00 0.00 0.00 0.00 12.30 10.90 17.80 13.90 1.50 2.90 0.00 0.00 59.30
1978-79 0.00 0.00 0.00 0.00 15.00 28.00 22.50 42.00 4.00 4.00 1.00 0.00 116.50
1979-80 0.00 0.00 0.00 0.00 15.00 19.00 23.50 7.00 8.50 2.00 0.00 0.00 75.00
1980-81 0.00 0.00 0.00 0.00 5.00 25.50 18.00 4.50 4.00 3.00 1.00 0.00 61.00
1981-82 0.00 0.00 0.00 0.00 10.00 38.00 48.00 12.50 13.00 9.00 0.00 0.00 130.50
1982-83 0.00 0.00 0.00 3.00 10.50 29.00 23.00 21.00 3.00 3.00 0.00 0.00 92.50
1983-84 0.00 0.00 0.00 0.00 15.50 b 60.90 7.00 19.20 6.50 6.00 0.00 0.00 115.10
1984-85 0.00 0.00 0.00 3.50 28.00 d 31.00 2.50 17.10 27.40 0.50 0.00 0.00 110.00
1985-86 0.00 0.00 0.00 1.50 35.20 9.30 22.30 24.70 2.00 1.00 1.50 0.00 97.50
1986-87 0.00 0.00 0.00 0.00 22.00 4.90 27.00 17.00 0.50 0.00 0.00 0.00 71.40
1987-88 0.00 0.00 0.00 0.00 1.00 20.50 19.30 10.20 11.00 1.00 0.00 0.00 63.00
1988-89 0.00 0.00 0.00 0.00 34.10 36.00 40.50 10.70 11.30 0.00 0.00 0.00 132.60
1989-90 0.00 0.00 0.00 1.00 4.50 0.50 25.50 17.00 3.50 1.00 0.00 0.00 53.00
1990-91 0.00 0.00 0.00 0.00 5.50 19.30 8.80 1.80 7.70 i 3.50 0.00 0.00 38.90
1991-92 0.00 0.00 0.00 3.50 25.00 a 4.50 10.80 1.00 0.00 0.00 0.00 0.00 44.80
1992-93 0.00 0.00 0.00 0.00 20.00 38.20 43.10 9.00 6.30 1.50 0.00 0.00 118.10
1993-94 0.00 0.00 0.00 0.00 9.00 25.50 10.00 23.80 0.00 0.00 0.00 0.00 68.30
1994-95 0.00 0.00 0.00 0.00 40.50 21.80 16.70 17.00 3.00 0.00 z 0.00 z 0.00 z 99.00
1995-96 0.00 z 0.00 z 0.00 0.00 17.00 8.00 21.00 9.00 0.00 0.00 1.00 0.00 56.00
1996-97 0.00 0.00 0.00 1.00 12.50 50.00 12.50 5.00 0.00 z 1.00 0.00 0.00 82.00
1997-98 0.00 0.00 0.00 0.00 2.80 14.90 27.10 13.80 7.60 s 2.50 0.00 0.00 61.10
1998-99 0.00 0.00 0.00 0.00 8.50 22.50 26.00 37.00 6.50 2.00 0.00 0.00 102.50
1999-00 0.00 0.00 0.00 0.00 5.00 20.00 31.00 14.00 7.00 0.00 0.00 0.00 77.00
2000-01 0.00 0.00 0.00 0.00 12.00 17.00 16.00 6.00 4.00 4.00 0.00 0.00 59.00
2001-02 0.00 z 0.00 z 0.00 0.00 14.00 39.00 27.00 3.00 9.00 0.00 0.00 0.00 92.00
2002-03 0.00 0.00 0.00 0.00 0.00 28.00 6.00 11.00 4.00 3.00 0.00 0.00 52.00
2003-04 0.00 0.00 0.00 0.00 12.00 28.00 29.00 18.00 7.00 0.00 0.00 0.00 94.00
2004-05 0.00 0.00 0.00 0.00 2.00 22.00 10.00 8.00 7.00 0.00 0.00 0.00 49.00
2005-06 0.00 0.00 0.00 0.00 21.00 32.00 43.00 7.00 11.00 2.00 0.00 0.00 116.00
2006-07 0.00 0.00 0.00 z 0.00 z 0.70 f 0.00 k 0.00 z 0.90 a 0.20 a 0.00 0.00 0.00 1.10
2007-08 0.00 0.00 0.00 1.00 0.20 d 35.50 34.70 26.10 13.50 8.30 0.20 1.10 120.60
2008-09 0.00 0.00 0.00 0.30 3.00 29.20 20.70 9.40 21.40 5.60 0.00 0.00 89.60
2009-10 0.00 0.00 0.00 1.70 6.80 14.10 22.70 6.80 2.70 7.40 7.90 0.00 z 70.10
Period of Record Statistics
MEAN 0.00 0.00 0.08 1.16 11.99 24.00 24.44 16.40 9.73 3.15 0.41 0.07 94.41
S.D. 0.00 0.00 0.44 2.36 10.25 13.81 12.49 11.12 7.59 3.25 1.15 0.32 30.50
SKEW 0.00 0.00 6.32 2.75 0.87 0.66 0.61 1.03 0.97 0.96 4.29 5.08 0.03
MAX 0.00 0.00 3.50 12.00 40.50 62.00 63.50 49.70 31.00 12.50 7.90 2.00 163.40
MIN 0.00 0.00 0.00 0.00 0.00 0.50 2.50 0.90 0.00 0.00 0.00 0.00 32.70
NO YRS 82 82 85 85 83 80 78 80 73 84 87 82 54