| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.91 | 0.30 | 0.68 | 1.89 | i | |||
| 1924 | 0.57 | 0.30 | 1.43 | 0.32 | 0.85 | 0.00 | 0.10 | 0.38 | 1.26 | 0.50 | 1.00 | 0.60 | c | 7.31 | ||||||||||||
| 1925 | 0.60 | 0.90 | 0.90 | 0.80 | 0.30 | 1.70 | a | 0.80 | 0.70 | 0.50 | 0.80 | a | 0.02 | 0.30 | 8.32 | |||||||||||
| 1926 | 0.60 | 0.80 | x | 1.10 | 0.30 | ----- | z | ----- | z | 0.36 | 1.35 | ----- | z | 0.02 | 0.78 | a | 1.10 | a | 5.61 | d | ||||||
| 1927 | 0.52 | 1.40 | 1.32 | 0.57 | 0.45 | 0.22 | 0.70 | 0.90 | 1.08 | 1.62 | 0.46 | 0.46 | 9.70 | |||||||||||||
| 1928 | 0.31 | 1.13 | 1.03 | 0.26 | 1.91 | 0.60 | 0.00 | 0.45 | 0.40 | 0.25 | 1.10 | 0.19 | 7.63 | |||||||||||||
| 1929 | 0.29 | 1.71 | 1.60 | 0.60 | 1.51 | 0.20 | 0.77 | 0.95 | 0.95 | 0.11 | 0.10 | 0.15 | 8.94 | |||||||||||||
| 1930 | 1.17 | 0.75 | 1.22 | 0.36 | 1.20 | 0.42 | 0.81 | 2.65 | 1.75 | 0.35 | 0.25 | 0.03 | 10.96 | |||||||||||||
| 1931 | 0.00 | 0.53 | 0.75 | 1.22 | 0.96 | 0.10 | 0.11 | 0.28 | 0.80 | 0.80 | 1.00 | 0.86 | 7.41 | |||||||||||||
| 1932 | 0.51 | 1.67 | 1.00 | 1.24 | 0.04 | 0.56 | 0.66 | 1.81 | 0.05 | 0.65 | 0.15 | 0.08 | 8.42 | |||||||||||||
| 1933 | 0.06 | 0.28 | 1.03 | 0.94 | 1.63 | 0.02 | 0.62 | 0.44 | 0.17 | 0.17 | 0.37 | 0.57 | 6.30 | |||||||||||||
| 1934 | 0.16 | 0.50 | 0.12 | 0.37 | 0.38 | 0.43 | 0.59 | 0.52 | 0.05 | 0.01 | 0.95 | 0.44 | 4.52 | |||||||||||||
| 1935 | 0.03 | 0.79 | 0.52 | 2.59 | 2.31 | 0.00 | 0.00 | 2.00 | 0.18 | 0.36 | 0.15 | 0.23 | 9.16 | |||||||||||||
| 1936 | 0.55 | 2.11 | 1.17 | 0.50 | 0.37 | 1.73 | 2.05 | 1.23 | 0.00 | 0.18 | 0.25 | 1.37 | 11.51 | |||||||||||||
| 1937 | 1.81 | 0.30 | 1.21 | 0.35 | 1.70 | 0.16 | 1.06 | 0.67 | 1.29 | 0.55 | 0.00 | 0.98 | 10.08 | |||||||||||||
| 1938 | 0.52 | 1.31 | 1.67 | 0.35 | 0.58 | 0.39 | 0.04 | 0.77 | 0.10 | 0.19 | 1.25 | 0.12 | 7.29 | |||||||||||||
| 1939 | 1.45 | 1.18 | 0.49 | 0.18 | 0.70 | 0.09 | 0.59 | 0.02 | 2.18 | 1.01 | 0.40 | 0.00 | 8.29 | |||||||||||||
| 1940 | 0.91 | 2.26 | 0.95 | 1.43 | 0.00 | 0.30 | 0.36 | 0.10 | 2.21 | 0.66 | 1.24 | 0.90 | 11.32 | |||||||||||||
| 1941 | 1.25 | 0.25 | 1.06 | 1.42 | 1.06 | 1.13 | 1.74 | 0.12 | 0.50 | 3.30 | 1.06 | 1.02 | 13.91 | |||||||||||||
| 1942 | 0.21 | 0.63 | 1.45 | 0.68 | 0.33 | 0.10 | 1.49 | 0.22 | 0.00 | 0.45 | 1.70 | 0.01 | 7.27 | |||||||||||||
| 1943 | 0.60 | 0.40 | 1.44 | 0.22 | 0.30 | 2.73 | 0.42 | 0.65 | 0.05 | 0.95 | 0.45 | 0.07 | 8.28 | |||||||||||||
| 1944 | 2.85 | 0.95 | 1.45 | 1.70 | 0.57 | 1.90 | 0.20 | 0.00 | 0.00 | 0.40 | 0.15 | 0.30 | 10.47 | |||||||||||||
| 1945 | 0.70 | 1.04 | 1.85 | 1.90 | 1.60 | 1.18 | 0.50 | 1.28 | 0.82 | 0.80 | 0.82 | 1.80 | 14.29 | |||||||||||||
| 1946 | 0.57 | 0.30 | 1.58 | 0.65 | 2.07 | f | ----- | z | 0.35 | 1.12 | 0.20 | 2.50 | 2.90 | 0.85 | 11.02 | b | ||||||||||
| 1947 | 0.60 | a | 0.45 | 0.60 | 1.20 | 1.16 | 3.75 | 0.80 | 1.60 | 0.30 | 1.45 | 1.72 | 0.92 | 14.55 | ||||||||||||
| 1948 | 0.50 | 2.24 | 2.13 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 4.87 | i | |||
| 1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.43 | 0.86 | 0.15 | 1.28 | 2.72 | h | ||||
| 1950 | 1.64 | 0.13 | 0.95 | 0.79 | 0.92 | 0.00 | 0.76 | 0.00 | 0.65 | 0.34 | 0.50 | 0.71 | 7.39 | |||||||||||||
| 1951 | 1.40 | 0.32 | 0.37 | 0.79 | 1.44 | 0.04 | 1.19 | 0.79 | 0.13 | 0.55 | 1.48 | 1.91 | 10.41 | |||||||||||||
| 1952 | 1.49 | 0.77 | 1.80 | 0.92 | 0.53 | 1.77 | 0.23 | 1.10 | 0.19 | 0.00 | 0.78 | 0.63 | 10.21 | |||||||||||||
| 1953 | 0.40 | 0.93 | 0.37 | 1.18 | 0.99 | 0.00 | 1.66 | 1.17 | 0.00 | 0.49 | 0.42 | 0.87 | 8.48 | |||||||||||||
| 1954 | 1.29 | 0.21 | 1.02 | 0.15 | 1.80 | 0.00 | 0.44 | 0.85 | 0.76 | 0.74 | 0.76 | 0.22 | 8.24 | |||||||||||||
| 1955 | 1.14 | 1.38 | 0.14 | 0.12 | 0.55 | 0.47 | 1.02 | 0.79 | 0.52 | 0.16 | 0.60 | 1.25 | 8.14 | |||||||||||||
| 1956 | 1.46 | 0.40 | 0.26 | 1.29 | 0.51 | 0.27 | 0.54 | 0.05 | 0.17 | 0.45 | 0.07 | 0.45 | 5.92 | |||||||||||||
| 1957 | 2.02 | 0.52 | 1.58 | 2.95 | 2.67 | 0.90 | 0.34 | 1.22 | 0.00 | 2.60 | 1.42 | 0.51 | 16.73 | |||||||||||||
| 1958 | 0.93 | 1.99 | 1.23 | 0.39 | 0.11 | 0.00 | 0.00 | 0.37 | 0.78 | 0.00 | 0.40 | 0.16 | 6.36 | |||||||||||||
| 1959 | 0.67 | 1.91 | 0.71 | 1.14 | 0.48 | 0.24 | 0.63 | 1.09 | 1.61 | 0.66 | 0.48 | 0.91 | 10.53 | |||||||||||||
| 1960 | 0.51 | 1.48 | 0.88 | 0.67 | 0.90 | 0.00 | 0.00 | 0.00 | 1.12 | 1.20 | 1.06 | 0.00 | 7.82 | |||||||||||||
| 1961 | 0.25 | 0.64 | 1.65 | 2.17 | 0.41 | 0.00 | 0.67 | 1.42 | 2.45 | 1.38 | 1.43 | 0.26 | 12.73 | |||||||||||||
| 1962 | 0.71 | 2.49 | 0.71 | 1.14 | 1.19 | 0.07 | 0.32 | 0.10 | 0.83 | 0.37 | 0.36 | 0.40 | 8.69 | |||||||||||||
| 1963 | 0.71 | 0.70 | 0.57 | 0.70 | 0.09 | 0.58 | 0.30 | 0.89 | 1.26 | 0.65 | 0.76 | 0.26 | 7.47 | |||||||||||||
| 1964 | 0.47 | 0.18 | 1.32 | 1.47 | 0.87 | 0.73 | 0.51 | 1.10 | 1.01 | 0.14 | 1.79 | 1.61 | 11.20 | |||||||||||||
| 1965 | 0.48 | 0.90 | 0.74 | 1.24 | 1.82 | 0.80 | 1.89 | 1.21 | 2.21 | 0.15 | 0.77 | 0.98 | 13.19 | |||||||||||||
| 1966 | 0.49 | 0.18 | 0.13 | 0.71 | 0.95 | 0.24 | 0.52 | 0.58 | 0.61 | 1.04 | 0.10 | 2.48 | 8.03 | |||||||||||||
| 1967 | 0.69 | 0.07 | 0.27 | 0.71 | 1.10 | 1.10 | 0.47 | 0.35 | 2.10 | 0.31 | 0.57 | 1.35 | 9.09 | |||||||||||||
| 1968 | 0.14 | 1.42 | 0.85 | 2.82 | 0.68 | 0.32 | 0.00 | 1.28 | 0.15 | 0.37 | 0.47 | 0.60 | 9.10 | |||||||||||||
| 1969 | 1.54 | 1.35 | 0.72 | 0.75 | 0.58 | 2.08 | 1.08 | 0.28 | 1.24 | 1.41 | 0.41 | 0.96 | 12.40 | |||||||||||||
| 1970 | 0.74 | 0.12 | 1.86 | 1.48 | 0.08 | 1.93 | 1.12 | 2.21 | 0.68 | 1.51 | 0.81 | 0.54 | 13.08 | |||||||||||||
| 1971 | 0.32 | 1.32 | 0.30 | 1.21 | 0.59 | 0.31 | 0.16 | 0.68 | 0.43 | 2.34 | 0.55 | 1.16 | 9.37 | |||||||||||||
| 1972 | 0.24 | 0.15 | 0.04 | 1.31 | 0.00 | 0.92 | 0.47 | 2.45 | 0.80 | 1.74 | 1.33 | 1.06 | 10.51 | |||||||||||||
| 1973 | 0.78 | 0.42 | 1.81 | 2.75 | 1.54 | 0.53 | 0.94 | 0.94 | 0.84 | 0.92 | 1.82 | 1.10 | 14.39 | |||||||||||||
| 1974 | 1.78 | 0.61 | 0.89 | 0.60 | 0.00 | 0.00 | 1.34 | 0.65 | 0.11 | 0.52 | 0.21 | 0.45 | 7.16 | |||||||||||||
| 1975 | 0.72 | 0.85 | 1.24 | 0.37 | 2.03 | 1.37 | 0.16 | 0.86 | 0.88 | 0.58 | 0.77 | 0.50 | 10.33 | |||||||||||||
| 1976 | 0.43 | 0.54 | 0.97 | 1.23 | 0.50 | 0.15 | 0.89 | 0.09 | 1.10 | 0.45 | 0.08 | 0.04 | 6.47 | |||||||||||||
| 1977 | 0.24 | 0.35 | 0.50 | 0.22 | 0.73 | 0.02 | 1.69 | 0.72 | 0.58 | 0.60 | 0.50 | 1.07 | 7.22 | |||||||||||||
| 1978 | 1.60 | 1.39 | 2.02 | 0.98 | 0.71 | 0.00 | 0.06 | 0.24 | 1.37 | 0.32 | 2.30 | 0.71 | 11.70 | |||||||||||||
| 1979 | 1.28 | 0.93 | 1.35 | 0.62 | 1.48 | 0.10 | 0.27 | 0.31 | 0.25 | 0.88 | 1.39 | 0.31 | 9.17 | |||||||||||||
| 1980 | 2.01 | 1.28 | 1.25 | 0.52 | 3.32 | 0.00 | 0.65 | 0.34 | 2.67 | 1.35 | 0.40 | 0.05 | 13.84 | |||||||||||||
| 1981 | 0.11 | 0.32 | 1.75 | 0.33 | 2.43 | 0.24 | 0.35 | 0.34 | 1.86 | 1.36 | 0.53 | 0.89 | 10.51 | |||||||||||||
| 1982 | 0.89 | 0.33 | 0.94 | 0.00 | 1.40 | 0.07 | 0.66 | 0.65 | 2.66 | 1.38 | 0.83 | 0.57 | 10.38 | |||||||||||||
| 1983 | 0.84 | 0.37 | 2.03 | 0.91 | 1.98 | 0.17 | 0.57 | 1.28 | 1.39 | 0.50 | 1.69 | 1.83 | 13.56 | |||||||||||||
| 1984 | 0.08 | 0.65 | 0.94 | 1.05 | 0.61 | 2.12 | 1.42 | 0.95 | 0.54 | 1.26 | 0.24 | 0.75 | 10.61 | |||||||||||||
| 1985 | 0.25 | 0.53 | 1.79 | 1.75 | 1.34 | 0.78 | 1.62 | 0.00 | a | 0.43 | 1.61 | 2.30 | 0.68 | 13.08 | ||||||||||||
| 1986 | 0.08 | 0.72 | 0.80 | 1.57 | 0.73 | 0.67 | 0.57 | 0.80 | 0.90 | 0.88 | 0.48 | 0.31 | 8.51 | |||||||||||||
| 1987 | 0.43 | 0.41 | 1.99 | 0.61 | 0.69 | 0.50 | 0.85 | a | 1.04 | 0.08 | 1.00 | 0.66 | 0.74 | 9.00 | ||||||||||||
| 1988 | 0.88 | 0.16 | 1.29 | 1.24 | 0.38 | 0.17 | 0.08 | 1.10 | 0.36 | 0.54 | 0.68 | 0.47 | 7.35 | |||||||||||||
| 1989 | 0.98 | 0.41 | 0.61 | 0.40 | 0.04 | 0.38 | 0.80 | 0.37 | 1.30 | 0.29 | 0.24 | 0.09 | 5.91 | |||||||||||||
| 1990 | 0.04 | 0.88 | ----- | z | 1.48 | 0.12 | 1.40 | 0.53 | 0.23 | 1.30 | 1.62 | 0.50 | 0.66 | 8.76 | a | |||||||||||
| 1991 | 0.17 | 0.20 | 0.90 | 0.54 | 2.27 | 0.21 | 0.18 | 1.79 | 0.89 | 1.17 | 1.00 | 0.02 | 9.34 | |||||||||||||
| 1992 | ----- | z | 0.30 | 1.36 | 0.49 | 1.39 | 0.56 | 0.35 | 0.14 | 0.29 | 1.06 | 0.45 | 0.61 | 7.00 | a | |||||||||||
| 1993 | 0.95 | 1.26 | 2.22 | a | 0.08 | 1.45 | 0.99 | 0.49 | 1.06 | 0.85 | 1.61 | 0.77 | a | 0.03 | 11.76 | |||||||||||
| 1994 | 0.13 | 0.14 | a | 0.37 | 1.50 | 0.62 | 0.04 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.80 | f | |||||
| 1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | v | 1.00 | a | 1.31 | 0.24 | e | 0.43 | n | 2.55 | i | |
| 2006 | 0.56 | o | 0.33 | m | 0.49 | s | 0.07 | t | ----- | z | 0.15 | j | 0.66 | a | 1.90 | 2.05 | 4.06 | 0.56 | 1.00 | 10.23 | f | |||||
| 2007 | 1.26 | 0.77 | 1.01 | 1.28 | 1.66 | b | 0.68 | 0.43 | 2.02 | 1.37 | 1.10 | 0.30 | 3.90 | p | 11.88 | a | ||||||||||
| 2008 | 0.71 | a | 1.74 | 0.75 | 0.48 | 1.69 | b | 0.74 | 0.75 | 0.42 | 0.64 | 2.25 | 0.55 | a | 3.71 | 14.43 | ||||||||||
| 2009 | 1.66 | 0.54 | 1.46 | 1.30 | 1.24 | 1.31 | 0.25 | 0.10 | 1.24 | 0.73 | 0.85 | 1.67 | 12.35 | |||||||||||||
| 2010 | 0.50 | 1.16 | 1.49 | a | 1.33 | a | 1.01 | 1.55 | 1.53 | 0.82 | a | 0.08 | 2.06 | 0.79 | a | 3.29 | 15.61 | |||||||||
| 2011 | 0.21 | e | 0.77 | 0.83 | i | 2.43 | 2.67 | 1.21 | 2.43 | 1.00 | s | ----- | z | ----- | z | ----- | z | ----- | z | 9.72 | f | |||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.76 | 0.82 | 1.09 | 0.98 | 1.02 | 0.65 | 0.68 | 0.81 | 0.84 | 0.92 | 0.75 | 0.76 | 9.91 | |||||||||||||
| S.D. | 0.58 | 0.60 | 0.54 | 0.67 | 0.74 | 0.75 | 0.54 | 0.62 | 0.70 | 0.77 | 0.59 | 0.70 | 2.67 | |||||||||||||
| SKEW | 1.08 | 0.92 | 0.06 | 1.05 | 0.79 | 1.70 | 1.11 | 0.85 | 0.87 | 1.61 | 1.32 | 1.92 | 0.47 | |||||||||||||
| MAX | 2.85 | 2.49 | 2.22 | 2.95 | 3.32 | 3.75 | 2.43 | 2.65 | 2.67 | 4.06 | 2.90 | 3.71 | 16.73 | |||||||||||||
| MIN | 0.00 | 0.07 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 4.52 | |||||||||||||
| YRS | 74 | 74 | 73 | 74 | 72 | 72 | 74 | 73 | 74 | 76 | 76 | 74 | 67 | |||||||||||||