| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1923 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.61 | ----- | z | 0.78 | 0.12 | 1.51 | i | |||
| 1924 | 0.04 | 0.00 | 1.11 | 0.06 | 0.00 | ----- | z | 0.00 | ----- | z | 0.00 | 0.37 | 0.20 | 0.43 | 2.21 | b | ||||||||||
| 1925 | 0.14 | 0.01 | ----- | z | 0.51 | ----- | z | 1.00 | 0.15 | 0.07 | ----- | z | ----- | z | ----- | z | ----- | z | 1.88 | f | ||||||
| 1926 | 0.31 | 0.35 | 0.40 | 1.99 | ----- | z | 0.00 | 0.00 | 0.00 | ----- | z | 0.68 | ----- | z | ----- | z | 3.73 | d | ||||||||
| 1927 | 0.00 | 2.32 | 1.76 | 0.00 | ----- | z | 0.00 | 0.25 | 0.00 | 0.62 | 0.18 | 0.11 | ----- | z | 5.24 | b | ||||||||||
| 1928 | 0.00 | 0.00 | 0.00 | 0.00 | 0.76 | 0.00 | 0.00 | 0.00 | 0.00 | 0.31 | 0.32 | ----- | z | 1.39 | a | |||||||||||
| 1929 | 0.48 | 0.17 | 0.21 | 0.12 | 0.00 | 0.00 | 0.00 | 0.26 | 0.51 | 0.00 | 0.00 | 0.00 | 1.75 | |||||||||||||
| 1930 | ----- | z | 0.41 | 1.07 | 0.69 | 1.72 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.00 | 3.93 | a | |||||||||||
| 1931 | 1.52 | 1.48 | 0.00 | 1.38 | 0.00 | 0.84 | 0.00 | 1.18 | 0.66 | 0.06 | 0.87 | 1.96 | 9.95 | |||||||||||||
| 1932 | 0.40 | 1.13 | 0.00 | 0.00 | 0.27 | 0.00 | 0.00 | 0.00 | 0.29 | 0.00 | 0.00 | 0.00 | 2.09 | |||||||||||||
| 1933 | 1.48 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.90 | 0.00 | 0.09 | 0.00 | 0.41 | 2.91 | |||||||||||||
| 1934 | 0.17 | 0.10 | 0.14 | 0.00 | 0.00 | 0.26 | 0.00 | 0.00 | 0.20 | 1.21 | 0.23 | 0.93 | 3.24 | |||||||||||||
| 1935 | 1.20 | 0.60 | 0.66 | 0.11 | 0.00 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.06 | 1.75 | 4.58 | |||||||||||||
| 1936 | 0.00 | 1.16 | 0.32 | 0.23 | 0.00 | 0.50 | 0.46 | 0.93 | 0.00 | 1.56 | 0.00 | 1.41 | 6.57 | |||||||||||||
| 1937 | 0.21 | 2.35 | 0.88 | 0.03 | 0.00 | 0.00 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 1.94 | 5.46 | |||||||||||||
| 1938 | 0.12 | 2.97 | 2.87 | 0.13 | 0.00 | 0.28 | 0.00 | 0.18 | 0.01 | 0.00 | 0.00 | 2.36 | 8.92 | |||||||||||||
| 1939 | 1.35 | 0.53 | 0.67 | 0.28 | 0.18 | 0.00 | 0.00 | 0.04 | 1.38 | 0.01 | 0.00 | 0.11 | 4.55 | |||||||||||||
| 1940 | 0.95 | v | 2.23 | ----- | z | 0.17 | ----- | z | 0.00 | ----- | z | 0.00 | 0.00 | ----- | z | 0.00 | 2.33 | 4.73 | e | |||||||
| 1941 | 2.53 | v | 5.37 | 1.36 | 3.16 | u | 0.00 | ----- | z | 0.36 | 1.01 | 0.00 | 0.28 | 0.07 | 2.06 | r | 8.45 | d | ||||||||
| 1942 | 0.07 | 0.50 | 0.56 | 0.63 | 0.00 | 0.00 | 0.00 | 0.16 | 0.07 | 0.00 | 0.00 | 0.16 | 2.15 | |||||||||||||
| 1943 | 5.50 | 1.25 | 1.31 | 1.45 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.32 | 0.10 | 4.86 | 14.79 | |||||||||||||
| 1944 | 0.58 | 3.21 | 0.81 | 0.01 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 0.39 | 0.00 | 5.26 | |||||||||||||
| 1945 | 0.11 | a | 1.91 | 1.69 | 0.00 | 0.29 | 0.00 | 0.12 | 0.96 | 0.21 | 5.86 | 0.00 | 2.35 | 13.50 | ||||||||||||
| 1946 | 0.20 | 0.26 | 0.45 | 0.03 | 0.10 | 0.00 | 0.39 | 0.40 | 0.28 | 0.16 | 5.15 | 2.20 | 9.62 | |||||||||||||
| 1947 | 0.02 | 0.06 | 0.05 | 0.34 | 0.39 | 0.00 | 0.00 | 0.00 | 0.00 | 0.87 | 0.03 | 0.60 | 2.36 | |||||||||||||
| 1948 | 0.00 | 0.07 | 0.28 | 0.00 | 0.00 | 0.22 | 0.00 | 0.00 | 0.37 | 0.02 | 0.00 | 0.54 | 1.50 | |||||||||||||
| 1949 | 0.60 | 0.68 | 0.29 | 0.36 | 0.43 | 0.00 | 0.23 | 0.05 | 0.00 | 0.00 | 0.38 | 1.09 | g | 3.02 | a | |||||||||||
| 1950 | 0.08 | 0.72 | 0.01 | 0.04 | 0.00 | 0.00 | 0.03 | 0.06 | 0.52 | 0.05 | 0.71 | 0.24 | 2.46 | |||||||||||||
| 1951 | 0.20 | 0.05 | 0.09 | 0.60 | 0.38 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.15 | 2.45 | 3.96 | |||||||||||||
| 1952 | 3.62 | 0.00 | 3.53 | 0.97 | 0.00 | 0.04 | 0.45 | 0.03 | 0.04 | 0.00 | 0.92 | 0.73 | 10.33 | |||||||||||||
| 1953 | 0.14 | 0.00 | 0.64 | 0.43 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.09 | 0.17 | 0.35 | 1.85 | |||||||||||||
| 1954 | 1.68 | 0.78 | 0.54 | 0.02 | 0.00 | 0.00 | 0.24 | 0.00 | 0.21 | 0.00 | 0.70 | 0.48 | 4.65 | |||||||||||||
| 1955 | 1.13 | 0.04 | 0.00 | 0.26 | 0.74 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.38 | 0.97 | 3.52 | |||||||||||||
| 1956 | 2.31 | 0.00 | 0.00 | 1.42 | 0.07 | 0.00 | 0.55 | 0.00 | 0.00 | 0.51 | 0.00 | 0.00 | 4.86 | |||||||||||||
| 1957 | 1.48 | 0.55 | 0.84 | 0.35 | 0.32 | 0.00 | 0.00 | 0.00 | 0.15 | 0.08 | 0.24 | 1.29 | 5.30 | |||||||||||||
| 1958 | 0.73 | 2.97 | 0.82 | 1.39 | 0.06 | 0.00 | 0.11 | 0.08 | 0.26 | 0.35 | 0.00 | 0.00 | 6.77 | |||||||||||||
| 1959 | 0.84 | 1.15 | 0.00 | 0.00 | 0.02 | 0.01 | 0.00 | 0.00 | 0.49 | 0.13 | 0.00 | 0.60 | 3.24 | |||||||||||||
| 1960 | 0.38 | 1.53 | 0.07 | 0.06 | 0.00 | 0.00 | 0.08 | 0.00 | 0.39 | 0.41 | 3.38 | 0.00 | 6.30 | |||||||||||||
| 1961 | 0.20 | 0.03 | 0.20 | 0.00 | 0.00 | 0.03 | 0.02 | 1.08 | 0.00 | 0.00 | 1.22 | 0.65 | 3.43 | |||||||||||||
| 1962 | 1.06 | 4.85 | 0.17 | 0.00 | 0.24 | 0.10 | 0.00 | 0.00 | 0.54 | 0.00 | 0.00 | 0.09 | 7.05 | |||||||||||||
| 1963 | 0.97 | 2.78 | 1.44 | 0.04 | 0.00 | 0.95 | 0.00 | 1.42 | 1.37 | 1.12 | 0.51 | 0.01 | 10.61 | |||||||||||||
| 1964 | 0.20 | 0.00 | 0.08 | 0.08 | 0.23 | 0.00 | 0.06 | 0.90 | 0.00 | 0.10 | 0.33 | 0.65 | 2.63 | |||||||||||||
| 1965 | 0.03 | 0.00 | 0.21 | 2.85 | 0.09 | 0.00 | ----- | z | 0.60 | 0.00 | 0.00 | 3.64 | 1.04 | 8.46 | a | |||||||||||
| 1966 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.00 | 0.14 | 0.19 | 0.00 | 0.00 | 0.54 | 6.50 | 7.40 | |||||||||||||
| 1967 | 1.00 | 0.00 | 0.01 | 0.46 | 0.09 | 0.32 | 1.05 | 0.12 | 0.80 | 0.00 | 2.57 | 0.46 | 6.88 | |||||||||||||
| 1968 | 0.03 | 0.50 | 0.87 | 0.00 | 0.04 | 0.24 | 1.27 | 0.21 | 0.00 | 0.03 | 0.10 | 0.32 | 3.61 | |||||||||||||
| 1969 | 6.01 | 3.87 | 1.01 | 0.16 | 0.40 | 0.11 | 0.48 | 0.02 | 0.00 | 0.00 | 0.12 | 0.00 | 12.18 | |||||||||||||
| 1970 | 0.57 | 1.67 | 1.24 | 0.01 | 0.00 | 0.00 | 0.09 | 0.33 | 0.00 | 0.00 | 2.49 | 1.14 | 7.54 | |||||||||||||
| 1971 | 0.02 | 0.25 | 0.04 | 0.03 | 0.95 | 0.00 | 0.54 | 0.08 | 0.04 | 0.00 | 0.06 | 2.33 | 4.34 | |||||||||||||
| 1972 | 0.00 | 0.03 | 0.00 | 0.04 | 0.00 | 0.31 | 0.00 | 0.08 | 0.01 | 0.16 | 1.37 | 0.33 | 2.33 | |||||||||||||
| 1973 | 1.82 | 2.11 | 0.85 | 0.00 | 0.31 | 0.24 | 0.05 | 0.06 | 0.00 | 0.00 | 0.67 | 0.12 | 6.23 | |||||||||||||
| 1974 | 3.48 | 0.00 | 2.53 | 0.46 | 0.45 | 0.00 | 0.19 | 0.99 | 0.00 | 1.05 | 0.30 | 1.56 | 11.01 | |||||||||||||
| 1975 | 0.00 | 0.25 | 1.00 | 0.15 | 0.09 | 0.37 | 0.00 | 0.00 | 1.19 | 0.03 | 0.00 | 0.00 | 3.08 | |||||||||||||
| 1976 | 0.00 | 4.28 | 0.22 | 0.13 | 1.32 | 0.02 | 0.44 | 0.08 | 3.24 | 0.01 | 0.14 | 0.00 | 9.88 | |||||||||||||
| 1977 | 1.15 | 0.13 | 0.25 | 0.00 | 1.82 | 0.00 | 0.00 | 2.56 | 0.00 | 0.00 | 0.00 | 2.28 | 8.19 | |||||||||||||
| 1978 | 3.47 | 4.73 | 4.98 | 0.65 | 0.04 | 0.00 | 0.39 | 0.07 | 0.88 | 0.02 | 0.29 | 0.39 | 15.91 | |||||||||||||
| 1979 | 1.55 | 1.01 | 1.82 | 0.00 | 0.01 | 0.00 | 0.14 | 0.19 | 0.49 | 0.18 | 0.02 | 0.04 | 5.45 | |||||||||||||
| 1980 | 1.73 | 4.31 | 1.23 | 1.35 | 0.58 | 0.00 | 0.02 | 0.00 | 0.00 | 0.00 | 0.00 | 0.61 | 9.83 | |||||||||||||
| 1981 | 0.84 | 0.33 | 2.79 | 0.06 | 0.98 | 0.00 | 0.00 | 0.03 | 0.47 | 0.27 | 1.90 | 0.02 | 7.69 | |||||||||||||
| 1982 | 0.78 | 0.52 | 1.91 | 0.62 | 0.10 | 0.07 | 0.23 | 0.05 | a | 0.58 | 0.10 | 1.92 | 1.27 | 8.15 | ||||||||||||
| 1983 | 2.66 | 2.41 | 5.19 | 0.45 | 0.00 | 0.00 | 0.00 | 2.70 | 0.10 | 0.83 | 0.73 | 2.20 | 17.27 | |||||||||||||
| 1984 | 0.00 | 0.02 | 0.14 | 0.00 | 0.11 | 0.06 | a | 3.80 | 1.41 | 0.03 | ----- | z | 2.63 | 2.01 | 10.21 | a | ||||||||||
| 1985 | 0.24 | 0.11 | 0.58 | 0.00 | 0.00 | 0.04 | 0.40 | 0.00 | 0.15 | 0.03 | 1.46 | 0.83 | 3.84 | |||||||||||||
| 1986 | 1.89 | 2.15 | 1.35 | 0.50 | 0.02 | 0.01 | 0.18 | 0.06 | 0.03 | 0.00 | 0.52 | 0.14 | 6.85 | |||||||||||||
| 1987 | 1.02 | 0.42 | 1.50 | 0.04 | 0.48 | 0.26 | 0.05 | 0.00 | 0.22 | 0.40 | 0.65 | a | 1.32 | 6.36 | ||||||||||||
| 1988 | 1.10 | 0.58 | 0.28 | 1.41 | 0.00 | 0.30 | 0.12 | 1.81 | 0.00 | 0.00 | 0.23 | 1.57 | 7.40 | |||||||||||||
| 1989 | 0.15 | 1.23 | 0.39 | 0.06 | 0.45 | 0.00 | 0.00 | 0.13 | 0.32 | 0.00 | 0.09 | 0.00 | 2.82 | |||||||||||||
| 1990 | 0.44 | 0.13 | 0.00 | ----- | z | 0.00 | 0.01 | 0.10 | 0.05 | 0.90 | 0.02 | 0.05 | 0.00 | 1.70 | a | |||||||||||
| 1991 | 0.13 | 1.04 | 3.52 | 0.00 | 0.00 | 0.00 | 0.03 | 0.00 | 0.45 | 0.20 | 0.42 | 1.71 | 7.50 | |||||||||||||
| 1992 | 1.02 | 4.89 | 2.23 | 0.55 | 0.38 | 0.00 | 0.15 | 0.14 | 0.00 | 0.28 | 0.02 | 2.33 | 11.99 | |||||||||||||
| 1993 | 2.51 | 1.38 | 1.23 | 0.00 | 0.00 | 0.02 | 0.00 | 0.00 | 0.00 | 0.15 | 0.07 | 0.00 | 5.36 | |||||||||||||
| 1994 | 0.14 | 1.43 | 0.50 | 0.56 | 0.24 | 0.00 | 0.00 | 0.00 | 0.11 | 0.13 | 0.06 | 0.29 | 3.46 | |||||||||||||
| 1995 | 7.32 | 0.66 | 2.40 | 0.03 | 0.74 | 0.00 | 0.50 | 0.00 | 0.04 | 0.00 | 0.00 | 1.16 | 12.85 | |||||||||||||
| 1996 | 0.65 | 1.23 | 0.45 | 0.10 | 0.29 | 0.08 | 0.16 | 0.00 | 0.00 | 0.39 | 0.46 | 1.73 | 5.54 | |||||||||||||
| 1997 | 0.58 | ----- | z | 0.00 | 0.00 | 0.03 | 0.49 | 0.86 | 0.00 | 2.37 | 0.00 | 0.26 | ----- | z | 4.59 | b | ||||||||||
| 1998 | 0.34 | 5.99 | 0.56 | 0.66 | 0.52 | 0.11 | 0.77 | 0.07 | 0.10 | 0.05 | 0.05 | ----- | z | 9.22 | a | |||||||||||
| 1999 | 1.23 | 0.09 | 0.73 | 1.10 | 0.12 | 0.00 | 1.43 | 0.00 | 0.10 | 0.00 | 0.00 | 0.00 | 4.80 | |||||||||||||
| 2000 | 0.21 | 2.35 | 1.56 | 0.19 | 0.25 | 0.00 | 0.00 | 0.10 | 0.00 | 0.15 | 0.00 | 0.00 | 4.81 | |||||||||||||
| 2001 | 2.29 | 2.57 | 0.74 | 0.11 | 0.18 | 0.00 | 0.55 | 0.00 | 0.00 | 0.00 | 1.07 | 0.23 | 7.74 | |||||||||||||
| 2002 | 0.00 | 0.00 | 0.00 | 0.00 | 0.08 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.46 | 1.93 | 5.47 | |||||||||||||
| 2003 | 0.02 | 1.69 | 0.25 | 0.17 | 0.27 | 0.00 | 0.22 | 1.64 | ----- | z | 0.00 | 0.89 | 0.18 | 5.33 | a | |||||||||||
| 2004 | 0.05 | 2.79 | 0.23 | 0.14 | 0.00 | 0.00 | 0.00 | 0.34 | 0.00 | 1.25 | 0.35 | 2.80 | 7.95 | |||||||||||||
| 2005 | 3.94 | 4.49 | 0.38 | 0.36 | 0.03 | 0.00 | ----- | z | 0.53 | 1.12 | 1.16 | 0.00 | 0.75 | 12.76 | a | |||||||||||
| 2006 | 1.65 | 0.79 | 0.78 | 0.91 | 0.23 | 0.50 | 0.39 | 0.00 | 0.00 | 0.37 | 0.00 | 0.13 | 5.75 | |||||||||||||
| 2007 | 0.06 | 0.27 | ----- | z | 0.12 | 0.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 0.31 | 0.76 | f | ||||||
| 2008 | 4.14 | 1.00 | 0.00 | 0.00 | 0.01 | 0.00 | 0.27 | 0.14 | e | 0.00 | 0.00 | 0.16 | 0.91 | 6.63 | ||||||||||||
| 2009 | 0.28 | 1.69 | 0.12 | d | 0.00 | 0.00 | 0.39 | 0.32 | 0.00 | 0.00 | 0.23 | 0.00 | 1.44 | 4.47 | ||||||||||||
| 2010 | 4.00 | 1.93 | 0.00 | 0.34 | 0.12 | 0.00 | 0.02 | 0.06 | 0.00 | a | 1.38 | 0.14 | 4.92 | 12.91 | ||||||||||||
| 2011 | 0.26 | 1.03 | 1.57 | 0.00 | 0.03 | n | 0.00 | 0.08 | 0.08 | 0.05 | 0.31 | 0.44 | 0.24 | 4.06 | a | |||||||||||
| 2012 | 1.69 | 0.02 | 0.20 | 0.03 | 0.00 | 0.00 | 0.02 | 0.01 | 0.00 | a | 0.00 | 0.05 | 0.15 | 2.17 | ||||||||||||
| 2013 | 0.38 | 0.00 | 0.10 | 0.01 | 0.05 | 0.00 | 1.31 | a | 0.01 | 0.02 | a | 0.04 | c | 0.18 | 0.23 | a | 2.33 | |||||||||
| 2014 | 0.00 | 0.22 | 1.38 | 0.00 | 0.09 | 0.00 | 0.11 | 0.50 | 0.02 | 0.00 | 0.02 | 1.74 | 4.08 | |||||||||||||
| 2015 | 0.54 | 0.15 | 0.17 | 0.00 | 0.44 | 0.04 | a | 0.81 | 0.00 | 0.09 | 1.19 | 0.00 | 0.04 | b | 3.47 | |||||||||||
| 2016 | 0.70 | 0.84 | 0.01 | 0.25 | 0.32 | 0.09 | 0.01 | 0.00 | v | 0.00 | 0.00 | 0.43 | 1.31 | 3.96 | a | |||||||||||
| 2017 | 5.96 | 0.34 | m | 0.01 | d | 0.02 | 0.15 | 0.00 | 0.00 | t | 0.38 | ----- | z | 0.00 | ----- | z | ----- | z | 6.52 | e | ||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 1.09 | 1.24 | 0.82 | 0.32 | 0.22 | 0.09 | 0.24 | 0.28 | 0.26 | 0.28 | 0.53 | 0.98 | 6.35 | |||||||||||||
| S.D. | 1.51 | 1.46 | 1.04 | 0.50 | 0.35 | 0.20 | 0.49 | 0.54 | 0.51 | 0.70 | 0.94 | 1.19 | 3.61 | |||||||||||||
| SKEW | 2.12 | 1.41 | 2.11 | 2.45 | 2.66 | 2.87 | 4.80 | 2.60 | 3.46 | 5.95 | 2.75 | 2.10 | 0.97 | |||||||||||||
| MAX | 7.32 | 5.99 | 5.19 | 2.85 | 1.82 | 1.00 | 3.80 | 2.70 | 3.24 | 5.86 | 5.15 | 6.50 | 17.27 | |||||||||||||
| 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 | 1.50 | |||||||||||||
| YRS | 91 | 92 | 91 | 92 | 89 | 91 | 89 | 91 | 90 | 90 | 92 | 86 | 74 | |||||||||||||