YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1927 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.09 | 0.00 | 0.16 | 1.46 | 1.48 | 1.64 | 1.10 | 5.93 | e | |||||||
1928 | 1.08 | 0.15 | 1.18 | 1.11 | 0.11 | 0.34 | 0.21 | 0.17 | 0.16 | 0.56 | 2.00 | 2.09 | a | 9.16 | ||||||||||||
1929 | 0.51 | ----- | z | 0.34 | ----- | z | 0.41 | 0.75 | ----- | z | ----- | z | ----- | z | 0.14 | ----- | z | 2.85 | 5.00 | f | ||||||
1930 | 0.61 | 1.36 | 0.55 | 0.35 | 0.22 | 0.44 | 0.02 | 0.07 | 0.25 | 0.10 | ----- | z | ----- | z | 3.97 | b | ||||||||||
1931 | 1.40 | 0.50 | 2.58 | 0.15 | 0.03 | 1.69 | 0.11 | 0.00 | 0.04 | 0.95 | 1.23 | 3.95 | 12.63 | |||||||||||||
1932 | 2.45 | 1.27 | 0.56 | 0.35 | 1.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.42 | 2.04 | 1.45 | 9.74 | |||||||||||||
1933 | 2.07 | 0.31 | 0.61 | 0.00 | 0.63 | 0.28 | 0.00 | 0.00 | 0.88 | 1.21 | 0.23 | 6.38 | 12.60 | |||||||||||||
1934 | 1.10 | 0.60 | 0.52 | 1.22 | 0.00 | 0.13 | 0.00 | 0.50 | 0.38 | 2.13 | 1.38 | 1.08 | 9.04 | |||||||||||||
1935 | 0.54 | 0.64 | 1.52 | 1.01 | 0.57 | 0.30 | 0.30 | 0.00 | 0.00 | 0.40 | 0.60 | 1.90 | a | 7.78 | ||||||||||||
1936 | ----- | z | ----- | z | 0.61 | 0.12 | 0.32 | 0.65 | 0.00 | 0.00 | 0.00 | 0.08 | 0.00 | a | 1.08 | 2.86 | b | |||||||||
1937 | 0.71 | 3.70 | 1.65 | 2.07 | 0.20 | 2.71 | 0.12 | 0.28 | 0.37 | 0.73 | 3.82 | 5.42 | 21.78 | |||||||||||||
1938 | 1.21 | 1.25 | 2.80 | 0.35 | 0.30 | 1.58 | 0.08 | 0.00 | 0.08 | 1.33 | 0.46 | 0.74 | 10.18 | |||||||||||||
1939 | 1.26 | 1.75 | 0.43 | 0.00 | 0.08 | 0.97 | a | 0.13 | 0.34 | 0.23 | 0.20 | 0.00 | 3.25 | 8.64 | ||||||||||||
1940 | 1.69 | 4.96 | 1.31 | 1.36 | 0.39 | 0.06 | 0.19 | 0.00 | 0.69 | 1.32 | 1.72 | 2.22 | 15.91 | |||||||||||||
1941 | 2.36 | 0.40 | 0.50 | 1.22 | 1.91 | 0.98 | 0.00 | 0.43 | 0.43 | 0.83 | a | 2.20 | 2.12 | 13.38 | ||||||||||||
1942 | 0.91 | 2.28 | 0.00 | 0.08 | 1.60 | 0.90 | 0.16 | 0.10 | 0.11 | 0.07 | 3.89 | 3.56 | 13.66 | |||||||||||||
1943 | 0.68 | 1.29 | 1.92 | 1.36 | 0.64 | ----- | z | ----- | z | ----- | z | 0.00 | b | 2.03 | 0.87 | d | 0.51 | 9.30 | c | |||||||
1944 | 0.79 | 0.64 | 0.35 | 0.95 | 0.47 | 1.38 | 0.00 | d | 0.00 | j | 0.38 | a | 0.18 | 0.76 | u | 0.77 | a | 5.91 | b | |||||||
1945 | 1.00 | 1.81 | 1.22 | 0.82 | 2.29 | 0.08 | 0.00 | 0.11 | 0.39 | 0.80 | 2.48 | 3.38 | a | 14.38 | ||||||||||||
1946 | 1.03 | 1.46 | a | 0.77 | 0.12 | 0.92 | c | 1.36 | 0.28 | a | 1.02 | b | 0.19 | a | 1.65 | a | 2.08 | 0.20 | 11.08 | |||||||
1947 | 1.01 | a | 0.99 | 0.82 | 0.51 | b | 0.05 | b | 1.01 | e | 0.68 | a | 0.01 | 0.75 | a | 3.82 | 0.82 | 0.46 | a | 10.93 | ||||||
1948 | 3.64 | 2.09 | 0.79 | b | 0.52 | a | 1.84 | c | 0.81 | a | 0.27 | 0.64 | 0.51 | 0.44 | 2.05 | 2.43 | 16.03 | |||||||||
1949 | 0.41 | 3.43 | 1.47 | 0.00 | 0.33 | 0.00 | 0.02 | 0.00 | 0.42 | 0.23 | 3.19 | k | 0.85 | 7.16 | a | |||||||||||
1950 | 2.05 | 0.67 | d | 1.35 | 0.70 | 0.06 | 2.83 | 0.00 | b | 0.00 | 0.08 | 3.81 | 3.47 | 1.30 | k | 15.02 | a | |||||||||
1951 | 1.87 | g | 0.35 | k | 1.01 | c | 0.86 | 0.61 | 2.07 | 0.90 | 0.14 | 0.62 | 0.92 | a | 2.46 | 3.08 | 12.67 | b | ||||||||
1952 | 1.75 | 0.81 | ----- | z | 0.00 | a | 0.55 | 1.88 | 0.00 | 0.00 | 0.13 | ----- | z | ----- | z | ----- | z | 5.12 | d | |||||||
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.42 | 0.00 | ----- | z | ----- | z | 0.17 | n | 2.96 | 2.91 | 6.29 | h | ||||
1954 | 5.73 | 1.18 | 1.09 | 1.06 | 0.40 | 0.55 | ----- | z | ----- | z | ----- | z | ----- | z | 0.14 | r | 1.07 | 11.08 | e | |||||||
1955 | 1.00 | 0.68 | 0.95 | 1.48 | 0.89 | 0.38 | 1.06 | 0.00 | 0.53 | 1.03 | 4.65 | 4.84 | 17.49 | |||||||||||||
1956 | 4.04 | 1.53 | 0.87 | 0.01 | 1.50 | 1.16 | 0.02 | 0.46 | 0.26 | 1.18 | 0.30 | 1.27 | 12.60 | |||||||||||||
1957 | 0.72 | 1.99 | 3.70 | 0.75 | 1.41 | 0.52 | 0.22 | 0.09 | 1.27 | 1.89 | 0.61 | 2.10 | 15.27 | |||||||||||||
1958 | 3.45 | 3.39 | 0.77 | 1.36 | 0.92 | 0.38 | 0.11 | 0.00 | 0.08 | 0.23 | 3.10 | 0.96 | 14.75 | |||||||||||||
1959 | 2.87 | 0.85 | 1.35 | 0.24 | 0.35 | 0.30 | 0.00 | ----- | z | 1.54 | 0.20 | b | 0.64 | ----- | z | 8.34 | b | |||||||||
1960 | 0.77 | 2.55 | 2.31 | a | 1.24 | 0.61 | 0.23 | 0.28 | 0.10 | 0.06 | 0.67 | 4.61 | 1.48 | 14.91 | ||||||||||||
1961 | 2.53 | 4.87 | 2.59 | 0.89 | 1.49 | 0.75 | 0.25 | 0.17 | 0.05 | 0.54 | 1.46 | 2.72 | 18.31 | |||||||||||||
1962 | 0.47 | 1.79 | 1.46 | 1.34 | 1.66 | 0.38 | 0.00 | 0.22 | 0.69 | 2.01 | 2.54 | 1.36 | 13.92 | |||||||||||||
1963 | 0.80 | 1.74 | 1.61 | 2.11 | 1.13 | 0.53 | 0.35 | 0.05 | 0.15 | 0.50 | 2.50 | 1.76 | 13.23 | |||||||||||||
1964 | 2.35 | 0.03 | 0.72 | 0.27 | 0.00 | 1.09 | 0.10 | 0.10 | 0.39 | 0.63 | 2.64 | 8.82 | 17.14 | |||||||||||||
1965 | 1.38 | 0.60 | 0.28 | 0.85 | 0.30 | 0.87 | 0.12 | ----- | z | 0.57 | 0.26 | 2.56 | 1.15 | 8.94 | a | |||||||||||
1966 | 2.94 | 0.60 | 1.78 | 0.09 | 0.00 | 0.10 | 1.93 | 0.00 | 0.64 | 1.03 | 3.42 | 2.90 | 15.43 | |||||||||||||
1967 | 2.41 | 0.45 | 0.94 | 1.58 | 0.42 | 0.78 | 0.00 | 0.00 | 0.01 | 1.58 | 1.26 | 0.92 | 10.35 | |||||||||||||
1968 | 2.35 | 3.17 | 0.40 | 0.03 | 0.46 | ----- | z | 0.00 | 2.14 | 0.31 | 1.24 | 2.42 | 2.07 | 14.59 | a | |||||||||||
1969 | 2.43 | a | 1.21 | 0.28 | 0.71 | 1.21 | 0.99 | 0.00 | 0.00 | 0.51 | 0.24 | 0.28 | 3.85 | 11.71 | ||||||||||||
1970 | 6.02 | 1.31 | 0.80 | 0.36 | 0.19 | 0.25 | 0.03 | 0.00 | 0.09 | 0.89 | 3.96 | ----- | z | 13.90 | a | |||||||||||
1971 | 4.95 | 1.54 | 3.24 | 0.92 | 1.27 | 1.83 | 0.00 | 0.22 | 2.08 | 0.96 | 1.61 | 2.33 | 20.95 | |||||||||||||
1972 | 3.14 | 1.67 | 1.22 | 0.60 | 1.44 | 1.29 | 0.11 | 0.28 | 0.34 | 0.12 | 1.33 | 2.33 | 13.87 | |||||||||||||
1973 | 1.96 | 0.39 | 0.31 | 0.24 | 0.14 | 0.05 | 0.00 | ----- | z | 0.60 | 1.81 | 4.91 | 3.94 | 14.35 | a | |||||||||||
1974 | 5.50 | 1.23 | 1.84 | 1.60 | 0.31 | 0.27 | 0.70 | 0.00 | 0.00 | 0.20 | 1.07 | 2.11 | 14.83 | |||||||||||||
1975 | 3.28 | 2.14 | 1.04 | 0.46 | 0.54 | 0.27 | 0.39 | 1.15 | 0.00 | 1.65 | 1.94 | 2.50 | 15.36 | |||||||||||||
1976 | 1.18 | 1.49 | 0.94 | 0.62 | 0.41 | 0.17 | 0.15 | 1.14 | 0.14 | 0.33 | 0.10 | 0.26 | 6.93 | |||||||||||||
1977 | 0.16 | 0.74 | 0.83 | 0.00 | 1.73 | 0.39 | 0.21 | 1.38 | 0.69 | 0.40 | 2.22 | 5.00 | 13.75 | |||||||||||||
1978 | 2.84 | 2.04 | 0.40 | 1.22 | 0.67 | 0.29 | 2.20 | 1.35 | 0.93 | 0.03 | 1.55 | 0.94 | 14.46 | |||||||||||||
1979 | 0.92 | d | 2.12 | 0.56 | 0.84 | 0.20 | 0.24 | 0.22 | 0.78 | 0.32 | 1.58 | 2.09 | 1.53 | 11.40 | ||||||||||||
1980 | 4.12 | 2.15 | 0.77 | 1.04 | 1.69 | 1.53 | 0.02 | 0.08 | 0.36 | 0.49 | 2.42 | 4.58 | 19.25 | |||||||||||||
1981 | 1.00 | 1.46 | 0.06 | 0.20 | 1.51 | 0.71 | 0.13 | 0.00 | 1.06 | 1.03 | 2.32 | 4.83 | 14.31 | |||||||||||||
1982 | 1.32 | a | 1.63 | 1.23 | a | 1.47 | 0.28 | 0.87 | 0.17 | c | 0.21 | 1.46 | 1.82 | 1.81 | 3.22 | 15.49 | ||||||||||
1983 | 2.44 | 3.27 | a | 3.65 | a | 0.71 | a | 1.03 | 1.14 | 0.39 | 0.57 | 0.69 | 0.47 | 4.47 | e | 2.81 | b | 21.64 | ||||||||
1984 | 0.28 | 1.28 | a | 1.94 | 1.34 | 1.14 | 1.56 | 0.00 | 0.01 | 0.87 | 0.27 | 5.48 | 0.89 | 15.06 | ||||||||||||
1985 | 0.21 | 1.01 | 0.79 | 0.05 | 0.17 | 1.18 | 0.03 | 0.07 | 1.35 | 1.53 | 0.96 | 0.95 | 8.30 | |||||||||||||
1986 | 3.69 | 1.97 | 1.61 | 0.30 | 0.76 | 0.07 | 0.31 | 0.04 | 1.23 | 0.59 | 2.51 | 0.95 | 14.03 | |||||||||||||
1987 | 1.79 | 1.72 | b | 1.82 | 0.16 | 0.52 | 0.17 | 1.00 | 0.02 | 0.01 | 0.01 | 0.80 | 5.53 | 13.55 | ||||||||||||
1988 | 1.91 | 0.05 | 0.99 | 1.68 | 0.26 | 0.51 | 0.13 | 0.00 | 0.14 | 0.02 | 3.88 | 1.04 | 10.61 | |||||||||||||
1989 | 0.97 | 1.16 | 2.29 | 1.66 | 0.86 | 0.07 | 0.14 | 0.99 | 0.07 | 0.83 | 1.29 | 0.46 | 10.79 | |||||||||||||
1990 | 1.98 | 0.45 | 0.45 | 0.43 | 1.60 | ----- | z | 0.14 | 1.58 | ----- | z | 1.09 | 0.28 | 0.96 | 8.96 | b | ||||||||||
1991 | 0.56 | 0.76 | 2.03 | 0.40 | 0.72 | 2.91 | 0.16 | 0.21 | 0.00 | 0.84 | 1.63 | 0.63 | 10.85 | |||||||||||||
1992 | 0.89 | 2.12 | 0.38 | 1.65 | 0.16 | 0.73 | ----- | z | 0.60 | 0.49 | 0.71 | 1.76 | 2.55 | 12.04 | a | |||||||||||
1993 | 2.00 | 1.23 | 1.19 | b | 0.67 | 0.92 | 0.59 | 0.43 | 0.19 | 0.10 | 0.00 | 0.20 | a | 1.52 | 9.04 | |||||||||||
1994 | 0.71 | 1.68 | 0.35 | 0.72 | 1.85 | 0.34 | ----- | z | 0.00 | 0.29 | 1.28 | ----- | z | 1.67 | 8.89 | b | ||||||||||
1995 | 4.00 | 1.80 | ----- | z | ----- | z | 2.11 | ----- | z | 0.75 | ----- | z | 0.84 | ----- | z | 2.04 | 3.00 | b | 14.54 | e | ||||||
1996 | 1.99 | 2.34 | ----- | z | 1.91 | 0.75 | 0.03 | 0.03 | 0.00 | 0.47 | 1.12 | 3.83 | 5.13 | 17.60 | a | |||||||||||
1997 | 1.81 | 1.09 | ----- | z | 0.96 | 0.32 | 0.73 | ----- | z | ----- | z | ----- | z | 2.30 | ----- | z | 0.58 | 7.79 | e | |||||||
1998 | 3.01 | 2.46 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.62 | 0.07 | ----- | z | ----- | z | 6.16 | h | ||||
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 | 0.61 | 0.96 | 1.57 | j | ||
2001 | 0.41 | 0.55 | 1.25 | a | 1.17 | a | 0.36 | 0.53 | 0.24 | 0.22 | 0.17 | 0.66 | b | 3.25 | a | 3.25 | 12.06 | |||||||||
2002 | 2.00 | b | 1.03 | a | 1.07 | a | 0.69 | 0.72 | a | 1.29 | 0.17 | 0.26 | 0.01 | 0.22 | c | 0.98 | 4.65 | a | 13.09 | |||||||
2003 | 3.61 | b | 1.21 | 1.39 | b | 1.96 | 0.30 | b | 0.00 | 0.00 | 0.84 | 0.00 | b | 0.51 | 0.78 | 2.70 | 13.30 | |||||||||
2004 | 1.65 | 1.86 | c | 0.59 | 0.52 | 0.65 | 1.70 | 0.10 | 0.92 | 0.04 | 0.67 | 0.11 | a | 2.09 | 10.90 | |||||||||||
2005 | 1.27 | 0.26 | c | 1.65 | 1.13 | 1.58 | b | 0.38 | 0.00 | h | 0.00 | m | 0.16 | a | 1.66 | d | 2.57 | b | 4.18 | 14.84 | b | |||||
2006 | 4.65 | b | 1.13 | d | 0.56 | b | 1.16 | h | 1.04 | g | 1.82 | g | 0.00 | c | 0.00 | d | 0.15 | c | 0.91 | b | 4.28 | e | 3.91 | 15.59 | c | |
2007 | 1.11 | a | 1.02 | b | 0.32 | i | 0.60 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.91 | v | 2.41 | s | 3.42 | q | 2.13 | j |
2008 | 2.61 | u | 1.26 | 0.62 | 0.52 | 0.95 | 0.44 | 0.02 | 0.05 | 0.31 | 0.70 | e | 1.11 | 2.24 | 8.22 | a | ||||||||||
2009 | 0.95 | 0.89 | 1.98 | 0.21 | 1.54 | 0.65 | 0.12 | 0.70 | 0.19 | 2.09 | 1.31 | 2.19 | 12.82 | |||||||||||||
2010 | 3.17 | 1.65 | 1.15 | 1.45 | 2.90 | 1.85 | 0.20 | 0.00 | 1.95 | 1.83 | 2.29 | 4.38 | 22.82 | |||||||||||||
2011 | 1.16 | 0.67 | 3.75 | 1.07 | 2.40 | 0.69 | 0.24 | 0.04 | 0.02 | 0.86 | 1.38 | 1.77 | 14.05 | |||||||||||||
2012 | 3.61 | 1.19 | 3.97 | 1.06 | 0.32 | 1.96 | 0.75 | 0.00 | 0.00 | a | 1.91 | 2.98 | 3.74 | 21.49 | ||||||||||||
2013 | 0.39 | 0.11 | 1.31 | 1.50 | 2.04 | 1.63 | 0.02 | 0.67 | 1.43 | 0.81 | 1.68 | 0.98 | 12.57 | |||||||||||||
2014 | 1.53 | 3.95 | 2.24 | 1.16 | 0.49 | c | 0.31 | 0.05 | 2.22 | 0.53 | 2.50 | a | 2.72 | 2.74 | 20.44 | |||||||||||
2015 | 1.28 | 2.47 | 1.30 | 0.09 | k | 2.05 | a | 0.00 | 0.00 | 0.05 | 0.00 | 0.41 | 0.68 | 7.03 | 15.27 | a | ||||||||||
2016 | 2.96 | 0.86 | 2.12 | 0.28 | 0.87 | 0.69 | 0.21 | 0.00 | 0.33 | 4.54 | 1.85 | 1.62 | 16.33 | |||||||||||||
2017 | 2.56 | 2.82 | 2.49 | 1.84 | 0.84 | 0.00 | 0.00 | 0.00 | n | ----- | z | 0.79 | 3.43 | 0.85 | 15.62 | b | ||||||||||
2018 | 2.21 | 0.64 | 0.89 | 1.89 | 0.37 | f | 0.27 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 5.90 | g | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.95 | 1.49 | 1.28 | 0.83 | 0.83 | 0.76 | 0.22 | 0.32 | 0.44 | 0.98 | 2.00 | 2.44 | 13.84 | |||||||||||||
S.D. | 1.34 | 1.01 | 0.89 | 0.59 | 0.67 | 0.68 | 0.38 | 0.50 | 0.47 | 0.87 | 1.30 | 1.68 | 3.69 | |||||||||||||
SKEW | 1.03 | 1.26 | 1.20 | 0.32 | 0.87 | 1.21 | 3.29 | 2.04 | 1.48 | 1.69 | 0.54 | 1.19 | 0.57 | |||||||||||||
MAX | 6.02 | 4.96 | 3.97 | 2.11 | 2.90 | 2.91 | 2.20 | 2.22 | 2.08 | 4.54 | 5.48 | 8.82 | 22.82 | |||||||||||||
MIN | 0.16 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 6.93 | |||||||||||||
YRS | 85 | 85 | 82 | 82 | 84 | 83 | 80 | 75 | 82 | 84 | 80 | 83 | 59 |