| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1924 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.12 | 1.45 | w | ----- | z | |
| 1925 | 0.75 | 2.74 | 1.40 | x | 0.78 | 0.13 | 0.38 | 0.70 | 0.43 | 0.14 | y | 0.58 | 0.31 | 0.68 | ----- | z | ||||||||||
| 1926 | 2.17 | 3.22 | 0.76 | 1.39 | 0.22 | 0.57 | 0.55 | w | 0.00 | 0.00 | 0.47 | 1.17 | a | 0.98 | 3.22 | x | ||||||||||
| 1927 | 0.72 | 0.91 | b | 0.92 | 0.84 | s | 0.60 | 0.85 | 0.58 | 0.00 | 0.66 | 0.94 | 0.92 | a | 1.62 | b | 1.62 | x | ||||||||
| 1928 | 1.23 | a | 1.24 | 1.06 | a | 1.52 | 0.84 | 0.14 | 0.34 | 0.00 | ----- | z | 1.10 | 1.00 | c | 0.73 | a | ----- | z | |||||||
| 1929 | 0.90 | 0.86 | 2.15 | 0.69 | 0.48 | 0.24 | 0.00 | 0.62 | 0.12 | 0.07 | 0.00 | 2.01 | 2.15 | |||||||||||||
| 1930 | 1.73 | 0.93 | 1.28 | 1.23 | 0.53 | 0.00 | 0.00 | 0.13 | 0.18 | 0.55 | 0.64 | 0.07 | 1.73 | |||||||||||||
| 1931 | 1.22 | v | 0.87 | r | 0.83 | 1.09 | 0.50 | 1.00 | 0.00 | 0.64 | 0.41 | 0.96 | 1.15 | t | 0.99 | r | ----- | z | ||||||||
| 1932 | 1.06 | t | 1.75 | 0.22 | 0.40 | 0.28 | 0.80 | 0.00 | 0.00 | 0.55 | 0.38 | 0.43 | 0.61 | 1.75 | t | |||||||||||
| 1933 | 1.16 | 0.43 | 1.11 | 0.20 | b | 0.73 | y | 0.94 | a | 0.00 | 0.31 | 0.00 | 0.69 | 0.30 | 1.47 | ----- | z | |||||||||
| 1934 | 1.20 | 0.92 | a | 0.63 | 0.00 | 0.22 | 0.56 | u | 0.00 | 0.82 | 0.30 | 0.38 | 0.64 | 0.65 | 1.20 | v | ||||||||||
| 1935 | 1.60 | 0.60 | 1.02 | a | 1.30 | 0.12 | 0.00 | 0.25 | 1.18 | 0.03 | 0.51 | 0.49 | 1.00 | 1.60 | a | |||||||||||
| 1936 | 1.12 | 2.54 | 0.72 | 0.88 | 0.16 | 0.37 | 0.58 | 0.36 | 0.04 | 0.90 | a | 0.00 | 2.60 | 2.60 | a | |||||||||||
| 1937 | 1.20 | 1.60 | 0.68 | l | 0.34 | 0.00 | 0.00 | 0.26 | 0.00 | 0.00 | 0.15 | 0.80 | 2.28 | 2.28 | l | |||||||||||
| 1938 | 0.92 | 2.72 | 2.12 | 0.54 | 1.16 | 0.62 | 0.85 | 0.13 | 0.79 | 0.60 | 0.25 | 0.59 | 2.72 | |||||||||||||
| 1939 | 1.02 | 0.99 | 0.73 | 0.71 | 0.19 | w | 0.19 | 0.40 | 0.10 | 0.56 | 0.58 | 0.19 | 0.18 | 1.02 | w | |||||||||||
| 1940 | 1.71 | 1.18 | 1.04 | 0.74 | 0.00 | 0.30 | 0.00 | 0.06 | 0.37 | 0.85 | 0.45 | 3.48 | 3.48 | |||||||||||||
| 1941 | 1.20 | 1.85 | 1.17 | 1.12 | 0.30 | 0.30 | 0.00 | 0.32 | 0.62 | 1.88 | 0.51 | 1.15 | 1.88 | |||||||||||||
| 1942 | 1.60 | 1.30 | 1.02 | 0.92 | 0.54 | 0.00 | 0.00 | 0.14 | 0.27 | 0.22 | 0.62 | 1.20 | t | 1.60 | t | |||||||||||
| 1943 | 2.25 | a | 0.56 | 0.66 | 1.22 | 0.60 | a | 0.42 | 0.22 | 0.00 | 0.16 | 0.30 | 0.34 | 1.43 | 2.25 | b | ||||||||||
| 1944 | 1.42 | 1.05 | 0.90 | 0.66 | a | 0.30 | 0.00 | 0.00 | 0.00 | 0.03 | 0.11 | 2.05 | 0.87 | 2.05 | a | |||||||||||
| 1945 | 0.37 | 3.03 | b | 0.63 | 0.44 | a | 3.06 | 0.30 | 0.16 | 0.80 | 0.40 | 2.04 | 0.51 | a | 0.94 | 3.06 | d | |||||||||
| 1946 | 0.33 | 0.82 | b | 1.14 | a | 0.49 | 0.42 | 0.00 | 0.09 | 0.75 | 1.37 | 1.20 | 2.08 | b | 1.85 | 2.08 | e | |||||||||
| 1947 | 0.14 | 0.44 | 0.36 | 0.29 | 0.09 | 0.00 | 0.00 | 0.25 | 0.12 | 0.46 | 0.21 | 0.32 | c | 0.46 | c | |||||||||||
| 1948 | 0.71 | a | 0.68 | c | 0.69 | 1.37 | 0.11 | 1.13 | ----- | z | 0.00 | ----- | z | ----- | z | 0.12 | 1.32 | ----- | z | |||||||
| 1949 | 0.36 | 0.42 | 0.95 | 0.11 | 0.58 | 0.10 | 0.02 | 0.24 | 0.06 | 0.12 | 0.85 | 0.68 | a | 0.95 | a | |||||||||||
| 1950 | 0.70 | c | 1.68 | a | 0.82 | 1.12 | 0.20 | 0.03 | 0.31 | 0.07 | 0.54 | a | 1.03 | ----- | z | ----- | z | ----- | z | |||||||
| 1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.10 | 0.10 | 0.10 | 0.15 | 0.50 | 2.60 | ----- | z | ||||||
| 1956 | 0.85 | 0.60 | a | 0.10 | 0.80 | 0.20 | 0.05 | 1.40 | 0.00 | 0.30 | 0.30 | 0.00 | 0.25 | 1.40 | a | |||||||||||
| 1957 | 2.00 | 1.20 | 0.30 | 0.15 | 0.70 | 0.08 | 0.00 | 0.00 | 0.20 | 0.24 | 0.20 | 1.12 | 2.00 | |||||||||||||
| 1958 | 0.54 | 0.90 | 0.72 | 0.76 | 0.44 | 0.22 | 0.04 | 0.45 | 0.34 | 0.14 | 0.15 | 0.20 | 0.90 | |||||||||||||
| 1959 | 0.80 | 1.72 | 0.50 | 0.58 | 0.26 | 0.08 | 0.16 | 0.00 | 1.66 | 0.02 | 0.00 | 0.62 | 1.72 | |||||||||||||
| 1960 | 3.02 | 0.96 | ----- | z | 0.56 | 0.24 | 0.00 | 0.24 | 0.04 | 0.32 | 0.76 | 1.08 | 1.22 | ----- | z | |||||||||||
| 1961 | 0.24 | 0.80 | ----- | z | 0.46 | 0.28 | ----- | z | 0.16 | 0.56 | 0.90 | 0.37 | 1.08 | 1.12 | ----- | z | ||||||||||
| 1962 | 1.12 | ----- | z | 0.80 | 0.08 | 0.94 | a | 0.38 | 0.14 | 0.35 | 0.38 | 0.50 | 0.15 | 0.41 | ----- | z | ||||||||||
| 1963 | 2.05 | 0.45 | 0.80 | 0.80 | 0.50 | 0.36 | 0.00 | 0.24 | 0.32 | 0.60 | ----- | z | 0.38 | ----- | z | |||||||||||
| 1964 | 2.58 | f | 0.12 | 0.40 | 0.86 | 0.54 | ----- | z | 0.22 | 0.57 | 0.00 | 0.30 | 1.00 | 1.74 | ----- | z | ||||||||||
| 1965 | 3.84 | d | 0.31 | 0.16 | ----- | z | 0.22 | 0.24 | 0.30 | 0.50 | 0.50 | 0.25 | 2.88 | 1.68 | ----- | z | ||||||||||
| 1966 | 0.32 | 0.38 | 0.16 | 0.20 | 0.16 | 0.10 | 0.12 | 0.68 | 0.16 | 0.08 | 1.52 | 1.74 | 1.74 | |||||||||||||
| 1967 | 1.36 | ----- | z | 1.66 | 0.60 | 0.20 | 0.08 | 0.40 | 0.30 | 0.26 | 0.18 | ----- | z | ----- | z | ----- | z | |||||||||
| 1968 | 0.38 | 0.46 | 0.22 | 0.16 | 0.40 | 0.18 | 0.68 | d | 0.16 | 0.02 | 0.56 | 0.86 | 1.58 | 1.58 | d | |||||||||||
| 1969 | 3.35 | b | ----- | z | ----- | z | ----- | z | 0.26 | 0.14 | 0.16 | 0.28 | 0.00 | 0.66 | 0.74 | ----- | z | ----- | z | |||||||
| 1970 | 1.02 | ----- | z | 0.50 | 0.26 | 0.00 | 0.12 | 0.04 | 0.00 | 0.00 | ----- | z | 1.64 | 1.58 | ----- | z | ||||||||||
| 1971 | 1.30 | 0.08 | 0.54 | 0.12 | 0.34 | 0.16 | 0.16 | 0.82 | 0.38 | 0.08 | 1.16 | 1.88 | 1.88 | |||||||||||||
| 1972 | 0.44 | 0.14 | 0.00 | 0.51 | 0.12 | 0.20 | 0.18 | 0.00 | 1.50 | 0.18 | 1.00 | 0.32 | 1.50 | |||||||||||||
| 1973 | 1.04 | 1.24 | 0.28 | 0.10 | 0.12 | 0.12 | 0.04 | 0.32 | 0.02 | 0.71 | 1.98 | 0.64 | 1.98 | |||||||||||||
| 1974 | 0.72 | 0.35 | 1.50 | 0.60 | ----- | z | 0.00 | 0.92 | 0.20 | 0.00 | 0.26 | 0.22 | 1.13 | ----- | z | |||||||||||
| 1975 | 0.30 | 1.14 | 0.62 | 0.58 | 0.22 | 0.16 | 0.26 | 0.14 | 0.72 | 0.78 | 0.20 | ----- | z | ----- | z | |||||||||||
| 1976 | 0.40 | 0.47 | 0.43 | 0.60 | m | 0.06 | 0.00 | 1.68 | 0.26 | 0.30 | 0.32 | 0.12 | 0.08 | 1.68 | m | |||||||||||
| 1977 | 0.62 | r | 0.48 | 0.25 | 0.16 | 0.22 | 0.70 | 0.08 | 0.12 | 0.06 | 0.16 | 1.00 | 3.69 | k | ----- | z | ||||||||||
| 1978 | 1.01 | 1.02 | 1.22 | 0.48 | 0.14 | 0.28 | 0.08 | 0.16 | 0.80 | 0.16 | ----- | z | 0.78 | ----- | z | |||||||||||
| 1979 | 0.96 | 0.94 | e | 1.58 | 0.14 | 0.12 | 0.06 | 0.08 | 0.12 | 0.08 | 0.38 | 0.28 | 2.00 | e | 2.00 | j | ||||||||||
| 1980 | 1.54 | 5.05 | y | 2.20 | o | 0.48 | 0.40 | 0.12 | 0.16 | 0.06 | 0.08 | 0.22 | 0.32 | 0.36 | ----- | z | ||||||||||
| 1981 | 1.66 | 0.62 | q | 1.12 | 0.12 | 0.12 | 0.30 | 0.22 | 0.06 | 0.18 | 0.90 | 1.72 | 1.22 | 1.72 | q | |||||||||||
| 1982 | 3.36 | 0.56 | 1.18 | 6.18 | a | 0.12 | 0.58 | 0.12 | 0.72 | 1.46 | 0.74 | 1.40 | 3.24 | 6.18 | a | |||||||||||
| 1983 | 0.84 | 0.84 | 2.20 | 0.40 | a | 0.32 | 0.12 | 0.00 | 0.74 | 0.28 | 0.24 | 0.90 | 2.04 | 2.20 | a | |||||||||||
| 1984 | 0.12 | 0.26 | 0.48 | 0.30 | 0.19 | 0.14 | 0.74 | 0.20 | 0.20 | 0.70 | 1.50 | 0.42 | 1.50 | |||||||||||||
| 1985 | 0.16 | 1.02 | 1.62 | 0.22 | 0.20 | 0.20 | 0.18 | 0.00 | 0.68 | 1.20 | w | 1.00 | 1.60 | 1.62 | w | |||||||||||
| 1986 | 1.08 | 2.94 | 1.36 | 0.20 | 0.08 | 0.00 | 0.08 | 0.02 | 0.10 | 0.22 | 0.04 | 0.26 | 2.94 | |||||||||||||
| 1987 | 0.62 | 0.40 | 0.48 | 0.12 | 0.32 | 0.26 | i | 0.04 | 0.02 | 0.00 | 0.40 | a | 0.54 | 0.60 | 0.62 | j | ||||||||||
| 1988 | 0.56 | 0.26 | 0.20 | 0.38 | 0.16 | 0.24 | 0.26 | 0.26 | 0.24 | 0.00 | 0.54 | 0.64 | 0.64 | |||||||||||||
| 1989 | 0.22 | 0.32 | 0.92 | 0.28 | 0.48 | 0.12 | 0.00 | 0.76 | 0.40 | 0.50 | 0.40 | 0.16 | 0.92 | |||||||||||||
| 1990 | 1.82 | 1.61 | 0.20 | 0.40 | 0.36 | 0.38 | 0.28 | 0.29 | 0.18 | 0.16 | 0.16 | 0.23 | 1.82 | |||||||||||||
| 1991 | 0.46 | 0.23 | 1.48 | 0.08 | 0.18 | 0.31 | 0.24 | 0.00 | 0.41 | 0.62 | 0.44 | 1.36 | 1.48 | |||||||||||||
| 1992 | 0.06 | 2.10 | 0.80 | 0.12 | 0.32 | 0.15 | 0.58 | 0.62 | 0.18 | 0.95 | 0.05 | ----- | z | ----- | z | |||||||||||
| 1993 | 1.18 | 1.14 | 0.57 | 0.19 | 0.23 | 0.14 | 0.00 | 0.04 | 0.05 | 0.10 | 0.46 | 0.40 | 1.18 | |||||||||||||
| 1994 | 0.19 | 1.00 | 0.34 | 0.18 | 0.53 | 0.07 | 0.21 | 0.00 | 0.52 | 1.66 | 0.60 | 0.41 | 1.66 | |||||||||||||
| 1995 | 2.20 | 0.35 | 2.32 | 0.20 | 0.21 | 0.31 | 0.15 | 0.18 | 0.00 | 0.00 | 0.07 | 1.69 | 2.32 | |||||||||||||
| 1996 | 0.78 | 1.75 | 1.52 | 0.32 | 0.79 | 0.15 | 0.37 | 0.00 | ----- | z | 0.70 | 1.77 | 1.37 | ----- | z | |||||||||||
| 1997 | 1.22 | 0.27 | 0.19 | 0.12 | 0.10 | 0.39 | 0.30 | 0.00 | 0.18 | 0.25 | 1.51 | 0.52 | 1.51 | |||||||||||||
| 1998 | 0.29 | 1.61 | 0.97 | 0.25 | 0.18 | 0.34 | 0.12 | 0.00 | 0.48 | 0.15 | 0.61 | 0.08 | 1.61 | |||||||||||||
| 1999 | 1.00 | a | 1.61 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.28 | 0.22 | 0.31 | 0.30 | 0.09 | ----- | z | ||||||
| 2000 | 0.60 | 0.80 | 0.25 | 0.72 | 0.18 | 0.19 | 0.00 | 0.78 | ----- | z | 0.83 | 0.19 | 0.00 | ----- | z | |||||||||||
| 2001 | 1.19 | 0.77 | 1.43 | 1.18 | 0.10 | ----- | z | 0.38 | 0.15 | 0.18 | 0.10 | e | 1.03 | 1.47 | ----- | z | ||||||||||
| 2002 | 0.68 | 0.42 | 0.28 | 0.38 | 0.23 | 0.10 | 0.15 | 0.10 | ----- | z | ----- | z | 1.10 | 1.25 | ----- | z | ||||||||||
| 2003 | 0.23 | 0.45 | 0.78 | 0.00 | 0.43 | 0.05 | 0.57 | 0.18 | 0.23 | 0.00 | ----- | z | 0.20 | ----- | z | |||||||||||
| 2004 | 0.25 | ----- | z | 0.15 | u | 0.28 | 0.57 | 0.13 | 0.25 | 0.30 | 0.34 | ----- | z | ----- | z | ----- | z | ----- | z | |||||||
| 2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2006 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2007 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2008 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 2009 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | ----- | z | ----- | z | ----- | z | ----- | z | |
| 2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | ----- | z | 0.00 | 0.00 | ----- | z | ----- | z | ----- | z | ----- | z | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 1.07 | 1.03 | 0.84 | 0.59 | 0.35 | 0.24 | 0.24 | 0.25 | 0.33 | 0.49 | 0.71 | 1.05 | 1.93 | |||||||||||||
| S.D. | 0.80 | 0.76 | 0.55 | 0.78 | 0.40 | 0.25 | 0.31 | 0.28 | 0.36 | 0.42 | 0.61 | 0.78 | 1.00 | |||||||||||||
| SKEW | 1.40 | 1.21 | 0.80 | 5.39 | 4.72 | 1.66 | 2.43 | 1.15 | 1.90 | 1.53 | 1.17 | 0.89 | 2.27 | |||||||||||||
| MAX | 3.84 | 3.22 | 2.32 | 6.18 | 3.06 | 1.13 | 1.68 | 1.18 | 1.66 | 2.04 | 2.88 | 3.48 | 6.18 | |||||||||||||
| MIN | 0.06 | 0.08 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.46 | |||||||||||||
| YRS | 71 | 67 | 67 | 70 | 71 | 70 | 73 | 77 | 72 | 71 | 70 | 67 | 34 | |||||||||||||