NORTH RIVER DAM, VIRGINIA

Monthly Total Snowfall (Inches)

(446199)

File last updated on May 16,
*** Note *** Provisional Data *** After Year/Month 197911
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
1929-30 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 z 0.00 z 0.00
1930-31 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 11.50 0.50 0.00 z 3.00 0.70 z 0.00 0.00 15.00
1931-32 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 z 0.00 0.00
1932-33 0.00 z 0.00 z 0.00 z 0.00 z 0.00 14.30 6.00 2.50 1.20 0.00 z 0.00 z 0.00 z 24.00
1933-34 0.00 z 0.00 z 0.00 z 0.00 z 0.00 4.00 z 0.00 2.10 10.50 0.00 0.00 z 0.00 z 12.60
1934-35 0.00 z 0.00 z 0.00 z 0.00 0.00 0.60 z 19.50 0.10 0.00 1.00 0.00 z 0.00 z 20.60
1935-36 0.00 z 0.00 z 0.00 z 0.00 0.50 z 9.90 w 2.40 20.00 4.00 0.00 0.00 z 0.00 z 26.40
1936-37 0.00 z 0.00 z 0.00 z 0.00 z 0.00 6.50 0.00 4.50 4.80 0.00 0.00 z 0.00 z 15.80
1937-38 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 9.40 0.20 0.00 1.50 0.00 z 0.00 z 0.00 z 11.10
1938-39 0.00 z 0.00 z 0.00 z 0.00 6.00 5.00 11.20 0.00 0.00 0.00 0.00 z 0.00 z 22.20
1939-40 0.00 z 0.00 z 0.00 z 0.00 10.70 4.20 11.50 2.70 0.00 0.00 0.00 z 0.00 z 29.10
1940-41 0.00 z 0.00 z 0.00 z 2.80 0.00 0.00 4.80 1.60 10.90 0.00 z 0.00 z 0.00 z 20.10
1941-42 0.00 z 0.00 z 0.00 z 0.00 0.00 z 0.00 2.00 0.00 11.50 0.00 0.00 z 0.00 z 13.50
1942-43 0.00 0.00 z 0.00 0.00 z 0.00 z 6.00 8.00 2.00 z 12.00 0.00 z 0.00 z 0.00 z 26.00
1943-44 0.00 z 0.00 z 0.00 0.00 0.00 4.00 3.00 4.00 z 4.50 0.00 0.00 0.00 11.50
1944-45 0.00 0.00 0.00 0.00 0.20 8.00 12.50 6.00 0.00 0.00 7.60 z 0.00 26.70
1945-46 0.00 0.00 0.00 z 0.00 0.00 14.00 15.50 11.00 0.00 2.00 0.00 0.00 z 42.50
1946-47 0.00 0.00 0.00 0.00 0.00 6.20 6.50 26.50 14.10 z 0.00 0.00 0.00 39.20
1947-48 0.00 0.00 0.00 z 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
1948-49 0.00 z 0.00 0.00 0.00 0.00 0.00 b 0.00 a 3.00 0.00 0.00 0.00 0.00 3.00
1949-50 0.00 0.00 0.00 0.00 1.80 0.20 0.00 0.40 1.00 0.00 0.00 0.00 3.40
1950-51 0.00 0.00 a 0.00 0.00 0.00 a 0.00 i 0.00 h 0.00 b 5.00 0.00 0.00 0.00 5.00
1951-52 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 0.00 z 0.00 c 0.00 0.00 0.00 0.00
1952-53 0.00 0.00 0.00 0.00 0.00 a 0.00 z 0.00 z 0.00 z 0.00 a 0.00 0.00 0.00 0.00
1953-54 0.00 0.00 0.00 z 0.00 z 5.80 0.00 0.00 c 0.00 0.00 0.00 z 0.00 0.00 z 5.80
1954-55 0.00 z 0.00 0.00 0.00 0.00 0.70 0.60 0.00 0.00 0.00 0.00 z 0.00 1.30
1955-56 0.00 0.00 a 0.00 0.00 0.30 0.00 a 3.10 0.00 0.00 0.00 0.00 0.00 3.40
1956-57 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
1957-58 0.00 0.00 0.00 0.00 0.00 0.30 0.00 z 0.00 z 2.50 d 0.00 0.00 0.00 2.80
1958-59 0.00 0.00 0.00 0.00 0.00 0.00 a 0.00 a 0.00 0.30 0.00 a 0.00 0.00 0.30
1959-60 0.00 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 0.00 0.00 0.00
1960-61 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 0.00 0.00 0.00 0.00
1961-62 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 0.00 0.00 0.00
1962-63 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 z 0.00 z 0.00 0.00 0.00 0.00 0.00
1963-64 0.00 0.00 0.00 0.00 0.00 0.00 a 0.00 z 0.00 z 0.00 0.00 0.00 0.00 0.00
1964-65 0.00 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 z 0.00 0.00 0.00 0.00 0.00
1965-66 0.00 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 z 0.00 0.00 0.00 0.00 0.00
1966-67 0.00 0.00 0.00 0.00 0.00 0.00 d 0.00 0.00 z 0.00 0.00 0.00 0.00 0.00
1967-68 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 z 0.00 a 0.00 z 0.00 0.00 0.00 0.00
1968-69 0.00 0.00 0.00 0.00 0.00 b 0.00 0.00 0.00 z 0.00 z 0.00 0.00 0.00 0.00
1969-70 0.00 0.00 0.00 0.00 0.00 0.00 a 0.00 0.00 0.00 0.00 0.00 0.00 0.00
1970-71 0.00 0.00 0.00 0.00 0.00 0.00 0.00 z 0.00 0.00 0.00 a 0.00 0.00 0.00
1971-72 0.00 0.00 0.00 0.00 10.00 0.00 0.00 0.00 z 0.00 0.00 0.00 0.00 10.00
1972-73 0.00 0.00 0.00 0.00 0.00 0.00 2.30 6.80 2.50 3.50 0.00 0.00 15.10
1973-74 0.00 0.00 0.00 0.00 0.00 5.00 b 0.00 4.50 2.00 0.00 0.00 0.00 11.50
1974-75 0.00 0.00 0.00 0.00 z 0.00 3.00 a 17.00 15.50 4.30 0.00 0.00 0.00 39.80
1975-76 0.00 0.00 0.00 0.00 0.30 4.10 0.50 0.50 15.80 0.00 0.00 0.00 21.20
1976-77 0.00 0.00 0.00 0.00 6.00 6.00 15.80 0.00 0.00 0.00 0.00 0.00 27.80
1977-78 0.00 0.00 0.00 0.00 0.20 3.00 33.00 2.50 a 11.00 0.00 0.00 0.00 49.70
1978-79 0.00 0.00 0.00 0.00 z 2.00 0.00 4.50 l 24.00 0.00 0.00 0.00 0.00 26.00
Period of Record Statistics
MEAN 0.00 0.00 0.00 0.07 0.98 2.93 5.03 4.19 2.52 0.15 0.00 0.00 13.24
S.D. 0.00 0.00 0.00 0.45 2.57 4.13 7.63 7.26 4.19 0.63 0.00 0.00 16.07
SKEW 0.00 0.00 0.00 6.00 2.73 1.36 1.87 2.00 1.73 4.37 0.00 0.00 1.22
MAX 0.00 0.00 0.00 2.80 10.70 14.30 33.00 26.50 15.80 3.50 0.00 0.00 49.70
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 34 35 34 39 44 38 35 32 43 42 34 35 10