YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1920 | 0.85 | 1.85 | 1.80 | 2.25 | 3.15 | 2.90 | 2.62 | 1.28 | 2.76 | ----- | z | 0.00 | n | 1.52 | 20.98 | b | ||||||||||
1921 | 1.85 | a | 2.70 | 4.66 | 9.10 | 8.20 | b | 0.63 | 4.38 | 2.35 | 0.33 | 0.60 | 0.51 | 1.52 | 36.83 | |||||||||||
1922 | 1.18 | a | 0.73 | 1.11 | a | 1.54 | 0.78 | 1.21 | 1.05 | 2.52 | 0.55 | 0.31 | 1.77 | 1.12 | 13.87 | |||||||||||
1923 | 0.41 | 1.17 | 1.37 | 1.48 | 0.12 | 0.93 | 2.53 | 5.97 | 4.45 | 1.94 | 0.95 | 0.67 | 21.99 | |||||||||||||
1924 | 0.39 | 0.44 | 1.45 | 0.69 | h | 0.67 | 0.02 | 2.46 | 1.14 | 0.65 | 0.68 | 0.73 | 1.40 | 10.03 | a | |||||||||||
1925 | 0.01 | 0.32 | 1.51 | 0.60 | 0.72 | 2.35 | 1.88 | 3.42 | 2.27 | 1.08 | 0.61 | 0.09 | 14.86 | |||||||||||||
1926 | 0.28 | 0.30 | 0.90 | 1.17 | 0.72 | 0.11 | 4.58 | 1.62 | 1.84 | 1.00 | 0.45 | 0.24 | 13.21 | |||||||||||||
1927 | 0.64 | 1.62 | 1.94 | 0.69 | 0.04 | 4.72 | 1.43 | 1.96 | 8.08 | 0.42 | 0.22 | 0.70 | 22.46 | |||||||||||||
1928 | 0.47 | 0.99 | 1.06 | 0.54 | 1.12 | 0.30 | 1.68 | 3.21 | 1.12 | 3.98 | 2.24 | 0.00 | 16.71 | |||||||||||||
1929 | 0.68 | 0.65 | 0.89 | 0.67 | 1.01 | 0.40 | 3.49 | 3.36 | 5.01 | 0.09 | 0.11 | 0.00 | 16.36 | |||||||||||||
1930 | 0.83 | 0.31 | 0.24 | a | 0.43 | 1.36 | 0.39 | 4.99 | 2.91 | 2.07 | 2.49 | 1.07 | 0.00 | 17.09 | ||||||||||||
1931 | 0.00 | 1.01 | 0.97 | 1.31 | 0.76 | 1.11 | 2.28 | 2.91 | 2.50 | 1.52 | 3.48 | a | 0.51 | 18.36 | ||||||||||||
1932 | 0.42 | 2.11 | 0.16 | 1.62 | a | 0.41 | 0.92 | 1.51 | 2.54 | 0.07 | 1.12 | 0.00 | 0.67 | 11.55 | ||||||||||||
1933 | 0.63 | 0.06 | 0.27 | 0.70 | 0.20 | 2.17 | 4.21 | 3.14 | 2.32 | 0.71 | 1.50 | 0.96 | 16.87 | |||||||||||||
1934 | 0.21 | 0.43 | 0.50 | 1.20 | 1.53 | 0.04 | g | 1.24 | 3.05 | 1.50 | 0.06 | 0.40 | 0.14 | 10.26 | a | |||||||||||
1935 | 0.77 | a | 0.17 | 2.64 | 0.87 | 2.81 | 1.01 | 3.44 | 2.83 | 2.01 | 1.02 | 0.21 | 0.28 | 18.06 | ||||||||||||
1936 | 0.05 | 0.44 | 1.40 | 0.38 | 1.02 | 0.79 | 1.79 | 4.02 | 1.58 | 1.36 | 0.37 | 1.93 | 15.13 | |||||||||||||
1937 | 0.95 | 0.74 | 0.62 | 0.13 | 1.26 | 0.71 | 1.58 | 3.17 | 2.37 | 0.31 | 0.00 | 0.59 | 12.43 | |||||||||||||
1938 | 1.38 | 1.08 | 2.09 | 0.36 | 1.37 | 3.37 | 1.41 | 1.34 | 3.42 | 5.22 | 0.76 | 0.57 | 22.37 | |||||||||||||
1939 | 0.83 | 0.32 | 0.70 | 0.59 | 0.15 | 0.81 | 1.50 | ----- | z | 1.68 | 1.00 | 0.14 | 0.54 | 8.26 | a | |||||||||||
1940 | 0.43 | 0.74 | 0.29 | 0.74 | 1.40 | 0.62 | 0.83 | 2.06 | 3.07 | 1.80 | 1.37 | 0.89 | 14.24 | |||||||||||||
1941 | 1.59 | 0.96 | 1.94 | 2.24 | 2.50 | 2.43 | 1.72 | 3.06 | 2.94 | 7.12 | 0.30 | 0.65 | a | 27.45 | ||||||||||||
1942 | 0.28 | 1.02 | 0.55 | 3.12 | 0.10 | 0.45 | 1.71 | 1.41 | 1.27 | 1.69 | 0.62 | 0.90 | 13.12 | |||||||||||||
1943 | 1.38 | 0.60 | 1.01 | 0.29 | 1.50 | 1.35 | 2.20 | 3.93 | 0.83 | 1.78 | 1.05 | 1.32 | 17.24 | |||||||||||||
1944 | 0.73 | 1.00 | 2.72 | 3.17 | 1.74 | 0.65 | 0.86 | a | 1.85 | 0.75 | 2.30 | 1.20 | 0.55 | 17.52 | ||||||||||||
1945 | 0.80 | 0.75 | 0.90 | 1.45 | 0.25 | 0.70 | 1.45 | 2.65 | 0.95 | 1.45 | 0.20 | 0.45 | 12.00 | |||||||||||||
1946 | 0.20 | a | 0.35 | 2.15 | 1.55 | 0.95 | 0.15 | 2.55 | 2.15 | 0.47 | 3.03 | 1.25 | 1.00 | 15.80 | ||||||||||||
1947 | 0.65 | 0.45 | 0.05 | 1.67 | 1.43 | 1.60 | 0.72 | 2.60 | 1.85 | 2.85 | 0.85 | 2.15 | 16.87 | |||||||||||||
1948 | 1.05 | 3.50 | 0.65 | 0.92 | a | 1.78 | 1.65 | 1.60 | 1.55 | 1.10 | 1.20 | 0.10 | 0.70 | 15.80 | ||||||||||||
1949 | 1.70 | 0.20 | 0.70 | 0.65 | 2.05 | 1.90 | 1.25 | 0.05 | 0.65 | 1.30 | a | 0.05 | 1.25 | a | 11.75 | |||||||||||
1950 | 0.80 | 0.10 | 0.75 | 0.95 | 0.00 | 1.22 | 1.93 | 0.50 | 2.10 | 0.70 | 0.35 | 0.55 | 9.95 | |||||||||||||
1951 | 0.25 | c | 0.53 | 0.00 | 1.70 | 0.15 | 0.45 | 1.20 | 2.55 | 0.20 | 1.55 | 1.60 | 2.50 | a | 12.68 | |||||||||||
1952 | 2.75 | 0.20 | 1.40 | 1.70 | 0.70 | 0.45 | 1.05 | g | 2.40 | 1.70 | 0.00 | 1.45 | 0.50 | 13.25 | a | |||||||||||
1953 | 0.60 | 0.10 | 0.65 | 0.90 | 1.64 | 0.60 | 3.10 | 1.85 | 0.00 | 3.10 | 1.35 | 0.00 | 13.89 | |||||||||||||
1954 | 0.00 | 0.00 | 0.53 | 0.35 | 2.50 | 0.75 | 5.25 | 1.90 | 1.47 | 0.65 | 0.40 | 1.03 | 14.83 | |||||||||||||
1955 | 0.55 | 0.30 | 0.05 | 1.25 | 1.90 | 0.50 | 2.05 | 2.35 | 0.60 | 0.15 | 0.75 | 1.10 | 11.55 | |||||||||||||
1956 | 1.15 | 0.80 | 0.40 | 1.35 | 0.75 | 0.25 | 0.60 | 1.00 | 0.20 | 1.15 | 0.40 | 0.45 | 8.50 | |||||||||||||
1957 | 2.65 | 0.00 | 1.10 | 2.80 | 2.20 | 0.75 | 4.20 | 2.95 | 0.00 | 3.10 | 2.30 | 0.15 | 22.20 | |||||||||||||
1958 | 0.70 | 0.40 | 1.60 | 2.20 | 0.35 | 0.45 | 0.80 | 2.15 | 1.60 | 1.60 | 0.40 | 0.00 | 12.25 | |||||||||||||
1959 | 0.35 | 1.90 | 0.00 | 1.60 | 1.00 | 1.02 | 0.90 | 3.25 | 1.80 | 5.00 | 0.45 | 1.60 | 18.87 | |||||||||||||
1960 | 0.85 | 1.10 | 1.05 | 0.85 | 0.75 | 1.20 | 1.20 | 1.10 | 1.10 | 2.15 | 0.70 | 1.15 | 13.20 | |||||||||||||
1961 | 0.00 | 0.35 | 3.55 | 1.20 | 0.65 | 0.40 | 2.20 | 3.10 | 1.70 | 4.10 | 1.25 | 0.60 | 19.10 | |||||||||||||
1962 | 0.75 | 1.25 | 1.45 | 0.40 | 0.70 | 0.00 | 2.05 | 1.05 | 1.60 | 1.65 | 0.70 | 0.65 | 12.25 | |||||||||||||
1963 | 0.80 | a | 0.50 | 1.60 | 0.90 | 0.50 | 0.15 | 4.05 | 2.85 | 2.10 | 0.55 | 0.85 | 0.35 | 15.20 | ||||||||||||
1964 | 0.35 | 0.60 | 1.45 | 0.95 | 0.95 | 0.70 | 3.15 | 2.70 | 2.30 | 0.00 | 3.70 | 2.35 | 19.20 | |||||||||||||
1965 | 0.75 | 1.65 | 2.05 | 4.05 | 2.25 | 0.75 | 1.30 | 2.80 | 2.55 | 1.50 | 1.00 | 3.15 | 23.80 | |||||||||||||
1966 | 0.47 | 0.73 | 0.48 | 1.40 | b | 1.55 | 0.95 | 2.05 | 1.40 | 1.10 | 0.45 | 0.95 | 1.80 | a | 13.33 | |||||||||||
1967 | 1.10 | 0.60 | 0.65 | 0.45 | 1.00 | 1.50 | 2.55 | 3.15 | 0.85 | 0.25 | 0.05 | 5.60 | 17.75 | |||||||||||||
1968 | 1.00 | 0.60 | 0.75 | 1.45 | 0.85 | 0.00 | 3.00 | 2.35 | 0.80 | 0.45 | 0.00 | 2.10 | 13.35 | |||||||||||||
1969 | 1.50 | 1.45 | 1.20 | 0.40 | 0.85 | 2.55 | 3.35 | 2.15 | 2.15 | 4.10 | 0.35 | 0.45 | 20.50 | |||||||||||||
1970 | 0.30 | 0.10 | 1.75 | 0.80 | 0.10 | 0.55 | 2.90 | 2.95 | 3.95 | 1.25 | 0.60 | 0.50 | 15.75 | |||||||||||||
1971 | 0.25 | 1.85 | 0.05 | 0.60 | 1.60 | 0.40 | 2.20 | 2.60 | 2.20 | 3.55 | 1.40 | 2.20 | 18.90 | |||||||||||||
1972 | 0.35 | 0.00 | 0.50 | 0.65 | 0.55 | 1.15 | 1.00 | 1.50 | 0.75 | 5.05 | 1.70 | 1.75 | 14.95 | |||||||||||||
1973 | 0.20 | 0.40 | 2.60 | 1.20 | 1.05 | 0.70 | 1.10 | 1.75 | 0.75 | 0.40 | 0.65 | 0.65 | 11.45 | |||||||||||||
1974 | 1.15 | 0.05 | 1.00 | 0.50 | 0.25 | 0.70 | 2.95 | 1.30 | 0.80 | 2.05 | 0.85 | 0.70 | 12.30 | |||||||||||||
1975 | 2.55 | 0.90 | 3.05 | 1.80 | 0.50 | 0.80 | 4.15 | 0.30 | 1.15 | 0.85 | 1.80 | 0.45 | 18.30 | |||||||||||||
1976 | 0.00 | 1.45 | 0.30 | 1.35 | 0.55 | 1.30 | 1.35 | 2.60 | 1.35 | 0.60 | 0.20 | 0.00 | 11.05 | |||||||||||||
1977 | 0.40 | 0.60 | 0.50 | 1.15 | 0.75 | 1.00 | 3.15 | 2.35 | 1.15 | 0.50 | 1.90 | 0.40 | 13.85 | |||||||||||||
1978 | 0.75 | 0.50 | 1.35 | 1.05 | 2.40 | 0.60 | 2.15 | 1.35 | 0.25 | 1.55 | 4.65 | 3.05 | 19.65 | |||||||||||||
1979 | 1.88 | a | 0.07 | 3.15 | b | 0.15 | 1.80 | 0.25 | 0.95 | 1.55 | 0.45 | 1.20 | 0.85 | 0.90 | 13.20 | |||||||||||
1980 | 1.75 | 0.75 | 1.82 | 2.70 | 1.30 | 0.00 | 0.80 | 2.60 | 0.55 | 1.40 | 0.20 | 0.85 | 14.72 | |||||||||||||
1981 | 0.10 | 0.45 | 1.20 | 0.60 | 2.25 | 0.50 | 5.10 | 1.70 | 0.85 | 3.10 | 1.30 | 0.30 | 17.45 | |||||||||||||
1982 | 0.75 | 0.40 | 0.45 | 1.25 | 1.35 | 0.10 | 1.45 | 4.05 | 3.50 | 0.45 | 0.80 | a | 1.10 | 15.65 | ||||||||||||
1983 | 0.25 | 0.35 | 0.95 | 0.55 | 0.70 | 0.95 | 1.00 | 2.18 | 1.25 | 0.60 | 1.25 | 1.55 | 11.58 | |||||||||||||
1984 | 0.35 | 0.55 | 1.55 | 2.20 | a | 1.01 | 1.55 | 4.05 | 3.40 | 1.10 | 2.06 | ----- | z | 2.05 | 19.87 | a | ||||||||||
1985 | 0.20 | 0.25 | 1.45 | 2.00 | 1.30 | 0.00 | 2.95 | 2.46 | 3.20 | 2.05 | 2.55 | 0.65 | 19.06 | |||||||||||||
1986 | 0.00 | 0.60 | 0.50 | 2.30 | 0.36 | 1.20 | 3.80 | 1.70 | 1.90 | 4.85 | 0.50 | 0.40 | 18.11 | |||||||||||||
1987 | 1.80 | 2.55 | 1.17 | 0.60 | a | 0.20 | 0.85 | 0.58 | 3.20 | 0.55 | 0.95 | 1.60 | 0.32 | 14.37 | ||||||||||||
1988 | 1.10 | 0.69 | a | 0.30 | 0.80 | 0.85 | 1.95 | 2.25 | 4.15 | 1.60 | 0.20 | 0.50 | 2.25 | 16.64 | ||||||||||||
1989 | 1.45 | 1.00 | 0.95 | 0.04 | ----- | z | 0.04 | 3.80 | 2.75 | 2.20 | 0.80 | 0.00 | 0.02 | 13.05 | a | |||||||||||
1990 | 1.15 | 1.40 | 1.55 | 2.95 | 1.60 | 0.30 | 3.00 | 2.05 | 3.65 | 1.25 | 2.20 | 1.00 | 22.10 | |||||||||||||
1991 | 0.35 | 0.00 | 0.35 | c | 1.10 | 1.05 | 0.85 | 3.00 | 2.25 | 2.20 | 0.50 | 2.60 | 0.40 | 14.65 | ||||||||||||
1992 | 0.15 | 0.40 | 0.50 | 0.05 | 2.70 | 0.30 | 2.11 | 3.30 | 0.75 | 0.25 | 0.55 | 1.40 | 12.46 | |||||||||||||
1993 | 1.35 | 2.05 | 0.35 | 0.25 | 0.70 | ----- | z | 0.15 | 4.30 | 0.05 | 0.00 | ----- | z | 0.00 | d | 9.20 | b | |||||||||
1994 | 0.60 | 0.85 | a | 0.75 | 1.08 | 0.90 | 0.80 | 1.10 | 2.00 | 3.65 | a | 0.85 | a | 0.52 | s | 0.80 | 13.38 | a | ||||||||
1995 | 0.30 | 0.80 | 1.65 | a | 0.15 | 0.91 | 3.44 | 2.08 | 1.76 | 1.21 | 0.00 | 0.46 | 0.06 | 12.82 | ||||||||||||
1996 | 0.24 | 0.42 | 0.04 | 0.33 | 0.04 | 1.70 | 1.56 | 3.05 | p | 0.68 | 2.41 | a | 0.60 | 0.34 | 8.36 | a | ||||||||||
1997 | 0.23 | 0.11 | h | 0.00 | a | 0.98 | b | 0.59 | 0.91 | 1.87 | 2.72 | 4.14 | 1.59 | 1.03 | b | 0.20 | 14.26 | a | ||||||||
1998 | 0.54 | 0.77 | 3.60 | 0.24 | 0.09 | 0.00 | 2.84 | 3.03 | 0.58 | 2.47 | 0.98 | 0.00 | 15.14 | |||||||||||||
1999 | 0.00 | c | 0.31 | 0.12 | 2.19 | a | 2.17 | 0.97 | 3.74 | 2.88 | 0.72 | 0.10 | 0.10 | 0.00 | 13.30 | |||||||||||
2000 | ----- | z | 1.41 | 3.81 | 0.41 | 0.10 | 0.81 | 0.42 | 4.35 | 1.05 | 1.81 | f | 1.53 | b | 0.19 | 14.08 | b | |||||||||
2001 | 1.96 | 1.45 | 1.19 | 1.09 | 1.09 | 0.21 | 1.59 | 2.58 | 0.71 | 0.08 | 0.70 | 0.30 | 12.95 | |||||||||||||
2002 | 0.06 | 0.02 | 0.46 | 0.37 | 0.10 | 0.07 | 1.74 | 1.25 | 2.10 | 1.36 | 0.59 | 0.24 | 8.36 | |||||||||||||
2003 | 0.13 | 0.53 | b | 0.31 | 0.56 | 1.57 | 0.20 | 1.41 | 2.93 | 2.42 | 0.31 | 1.74 | 0.45 | 12.56 | ||||||||||||
2004 | 0.95 | b | 0.85 | b | 0.00 | 1.66 | 0.04 | 0.82 | 1.94 | 0.74 | 2.50 | 1.93 | 1.51 | 1.01 | 13.95 | |||||||||||
2005 | 1.93 | 0.58 | 0.25 | 0.70 | 0.41 | 0.55 | 0.51 | 4.29 | e | 3.17 | 2.01 | 0.07 | 0.29 | 14.76 | ||||||||||||
2006 | 0.55 | 0.11 | 1.39 | a | 0.68 | 0.40 | 0.83 | 3.56 | 4.47 | 2.05 | a | 2.72 | 0.51 | 1.17 | a | 18.44 | ||||||||||
2007 | 0.58 | 0.20 | 0.70 | 1.28 | 1.58 | 0.44 | 2.02 | 3.31 | 1.84 | 0.85 | a | 0.22 | 10.17 | d | 23.19 | |||||||||||
2008 | 1.70 | 0.91 | 0.66 | 0.00 | a | 0.32 | 0.22 | a | 2.21 | 1.04 | 1.08 | 1.39 | 0.38 | 1.70 | a | 11.61 | ||||||||||
2009 | 0.08 | 0.63 | 0.46 | b | 0.87 | a | 0.56 | 1.69 | 0.82 | 1.58 | b | 1.44 | 0.80 | 0.25 | 0.93 | 10.11 | ||||||||||
2010 | 0.43 | 0.37 | 1.36 | 1.03 | 0.00 | 0.35 | 2.93 | 2.80 | 1.40 | 0.85 | 0.27 | 0.67 | 12.46 | |||||||||||||
2011 | 0.07 | 0.75 | a | 0.36 | 0.61 | 0.22 | 0.24 | 1.97 | 1.98 | 0.78 | 2.18 | 0.07 | b | 0.85 | 10.08 | |||||||||||
2012 | 0.25 | 0.49 | b | 0.21 | 0.17 | b | 0.59 | 0.10 | 2.13 | 1.78 | 1.23 | 0.50 | 0.56 | 0.62 | k | 8.01 | a | |||||||||
2013 | 0.74 | 0.24 | 0.32 | 0.74 | 0.33 | 0.08 | 1.68 | 4.13 | 4.13 | 1.66 | 1.36 | 0.32 | 15.73 | |||||||||||||
2014 | 0.09 | 2.17 | 0.55 | 0.28 | 1.07 | 0.05 | 1.69 | 1.43 | 4.09 | 0.40 | 1.52 | 0.67 | 14.01 | |||||||||||||
2015 | 0.43 | 1.11 | 0.46 | 0.21 | 2.19 | 1.07 | 1.68 | 1.59 | 1.25 | 1.76 | 1.57 | 0.81 | 14.13 | |||||||||||||
2016 | 0.36 | 0.42 | 0.38 | 1.68 | 0.56 | 0.62 | 2.05 | 3.55 | 1.29 | 0.38 | c | ----- | z | ----- | z | 11.29 | b | |||||||||
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | m | 3.35 | 2.88 | 2.47 | 0.69 | 0.18 | 0.12 | 9.69 | f | ||||||
2018 | 0.38 | 1.46 | 0.32 | 0.84 | 0.27 | 0.20 | 1.13 | 1.06 | 0.60 | 2.14 | 0.14 | 0.40 | 8.94 | |||||||||||||
2019 | 0.69 | 2.64 | 2.96 | 1.36 | 1.11 | 0.77 | 1.02 | 1.28 | 0.73 | 0.08 | 2.03 | 0.87 | 15.54 | |||||||||||||
2020 | 0.07 | 0.58 | 1.04 | 0.00 | 0.48 | 0.64 | 2.27 | 1.27 | 1.03 | 0.34 | 1.89 | 0.53 | 10.14 | |||||||||||||
2021 | 0.60 | 0.25 | 0.45 | 0.49 | 2.16 | 1.48 | 2.57 | 1.00 | 1.10 | 1.41 | 0.00 | 0.90 | 12.41 | |||||||||||||
2022 | 0.11 | 0.83 | 1.01 | 0.32 | 0.38 | 2.48 | 3.59 | 2.62 | 1.36 | 1.57 | 0.67 | 0.62 | 15.56 | |||||||||||||
2023 | 1.91 | 1.44 | 1.30 | 0.21 | 2.05 | 1.43 | 1.02 | 0.74 | 1.75 | 1.14 | 0.53 | 1.22 | 14.74 | |||||||||||||
2024 | 0.51 | 1.25 | 1.54 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 3.30 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.72 | 0.79 | 1.09 | 1.13 | 1.07 | 0.89 | 2.18 | 2.38 | 1.68 | 1.48 | 0.93 | 0.96 | 15.50 | |||||||||||||
S.D. | 0.62 | 0.66 | 0.92 | 1.12 | 1.03 | 0.82 | 1.14 | 1.03 | 1.25 | 1.33 | 0.84 | 1.24 | 4.35 | |||||||||||||
SKEW | 1.22 | 1.50 | 1.45 | 3.94 | 3.50 | 1.89 | 0.68 | 0.38 | 1.78 | 1.62 | 1.69 | 4.68 | 1.67 | |||||||||||||
MAX | 2.75 | 3.50 | 4.66 | 9.10 | 8.20 | 4.72 | 5.25 | 5.97 | 8.08 | 7.12 | 4.65 | 10.17 | 36.83 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.15 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 8.36 | |||||||||||||
YRS | 103 | 103 | 104 | 102 | 102 | 101 | 103 | 102 | 104 | 102 | 99 | 102 | 89 |