YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1931 | 0.27 | 0.98 | 0.22 | 2.05 | 0.25 | 0.37 | 2.62 | n | 2.97 | 1.16 | 0.91 | 2.67 | a | 0.24 | 12.09 | a | ||||||||||
1932 | 0.37 | 0.62 | 0.19 | 0.35 | 0.52 | 0.00 | 1.13 | 1.24 | ----- | z | 0.36 | 0.00 | 1.53 | 6.31 | a | |||||||||||
1933 | 0.38 | 1.07 | ----- | z | 0.76 | 0.02 | 0.20 | 1.50 | 0.84 | 1.92 | 1.42 | 0.65 | 0.29 | 9.05 | a | |||||||||||
1934 | 0.11 | 1.22 | 0.40 | 0.75 | 1.45 | 0.09 | 1.06 | 2.09 | 0.23 | x | 0.08 | 0.44 | 0.87 | 8.56 | a | |||||||||||
1935 | 1.58 | 0.88 | 0.30 | 0.00 | 0.97 | 0.03 | 0.49 | 2.74 | 2.01 | ----- | z | 0.65 | 0.30 | a | 9.95 | a | ||||||||||
1936 | 1.13 | 0.70 | 1.12 | 0.09 | 0.27 | 0.23 | 2.79 | 1.27 | 2.10 | 0.78 | 0.24 | 1.04 | 11.76 | |||||||||||||
1937 | 0.63 | 0.46 | 0.65 | 0.16 | 0.28 | 0.64 | 1.87 | 0.50 | 0.41 | 0.37 | 0.03 | 0.44 | 6.44 | |||||||||||||
1938 | 0.17 | 1.34 | 1.34 | 0.72 | 0.31 | 0.66 | 1.51 | 0.47 | 0.57 | ----- | z | 0.07 | 0.48 | 7.64 | a | |||||||||||
1939 | 0.68 | x | 2.00 | 0.48 | y | 1.10 | 0.01 | 0.00 | 0.45 | 1.59 | 1.02 | ----- | z | 0.75 | x | ----- | z | 6.17 | e | |||||||
1940 | 0.53 | 1.26 | a | 0.31 | 1.99 | 0.20 | y | 0.51 | y | 1.18 | u | 0.72 | q | 1.86 | 1.02 | 0.75 | 1.49 | 9.21 | d | |||||||
1941 | 1.90 | 1.33 | 2.74 | t | 1.02 | 1.07 | 0.37 | 2.69 | 1.45 | 2.48 | 1.02 | 0.44 | 0.54 | 14.31 | a | |||||||||||
1942 | 0.26 | 0.44 | 0.12 | 0.59 | 0.00 | 0.00 | 0.39 | 1.52 | 0.34 | 1.63 | 0.36 | 0.18 | 5.83 | |||||||||||||
1943 | 0.73 | 0.69 | 0.53 | 0.08 | 0.49 | 0.16 | 1.78 | 2.19 | 1.24 | 0.82 | 0.02 | 1.07 | 9.80 | |||||||||||||
1944 | 0.17 | 0.34 | 0.59 | a | 0.81 | 0.52 | 0.00 | 0.70 | 0.81 | 1.36 | 0.49 | 1.23 | 0.54 | 7.56 | ||||||||||||
1945 | 0.20 | 0.30 | 0.41 | 0.10 | 0.00 | 0.16 | 3.73 | 1.66 | 0.06 | 0.23 | 0.00 | 0.94 | 7.79 | |||||||||||||
1946 | 0.40 | 0.12 | a | 0.26 | 0.06 | 0.05 | 0.00 | 1.33 | 1.91 | 2.10 | 0.15 | 0.96 | 0.14 | 7.48 | ||||||||||||
1947 | 0.19 | 0.16 | 0.00 | 0.04 | 0.96 | 0.22 | 0.62 | 2.89 | 0.39 | 2.10 | 0.60 | 0.38 | a | 8.55 | ||||||||||||
1948 | 0.12 | a | 1.05 | u | 0.55 | y | 0.01 | 0.02 | ----- | z | 0.71 | 1.14 | 0.53 | 1.52 | 0.00 | 0.68 | 4.73 | c | ||||||||
1949 | 0.50 | 0.15 | 0.17 | 0.24 | 0.40 | 0.58 | 0.94 | a | 4.33 | 1.72 | 0.51 | c | 0.24 | 0.20 | 9.98 | |||||||||||
1950 | 0.19 | 0.59 | 0.11 | 0.00 | 0.02 | 0.15 | 1.35 | 0.78 | 0.61 | 0.00 | 0.05 | 0.00 | 3.85 | |||||||||||||
1951 | 0.76 | 0.38 | 0.35 | 0.61 | 0.03 | d | 0.00 | 0.67 | 2.08 | 0.50 | 0.93 | 0.84 | 0.35 | 7.50 | ||||||||||||
1952 | 0.64 | 0.33 | 0.36 | 1.53 | 0.04 | 0.92 | 1.95 | 1.78 | 1.71 | 0.00 | 2.29 | 0.25 | 11.80 | |||||||||||||
1953 | 0.08 | 0.04 | 0.79 | 0.84 | 0.11 | 0.06 | 2.19 | 0.66 | 0.00 | f | 0.13 | c | 0.53 | 0.43 | 5.86 | a | ||||||||||
1954 | 0.32 | f | 0.36 | 0.93 | 0.00 | 0.37 | 0.00 | 4.67 | 1.46 | 1.40 | 0.53 | 0.21 | 0.20 | 10.13 | a | |||||||||||
1955 | 0.36 | 0.39 | 0.07 | 0.01 | 0.69 | 1.76 | 1.22 | 3.42 | 0.04 | 0.20 | 0.18 | 0.18 | 8.52 | |||||||||||||
1956 | 1.41 | 0.87 | 0.00 | 0.23 | 0.52 | 0.17 | 0.77 | 0.89 | 0.02 | 0.57 | 0.10 | 0.13 | 5.68 | |||||||||||||
1957 | 0.83 | 0.65 | 0.58 | 0.21 | 0.72 | 0.60 | 1.07 | 2.13 | e | 0.00 | 2.39 | 0.61 | 0.21 | a | 10.00 | |||||||||||
1958 | 0.16 | 0.49 | 1.09 | 0.32 | 0.53 | 1.40 | 1.13 | 3.21 | 2.53 | 0.55 | 0.51 | 0.00 | 11.92 | |||||||||||||
1959 | 0.12 | 0.17 | 0.00 | 0.36 | 0.03 | 0.12 | 1.11 | 1.61 | 0.25 | 3.61 | 0.52 | 1.30 | 9.20 | |||||||||||||
1960 | 0.71 | 0.26 | 0.58 | 0.19 | 0.49 | 0.36 | 0.19 | 0.61 | 0.39 | 1.43 | 0.02 | 0.61 | 5.84 | |||||||||||||
1961 | 0.18 | 0.11 | 0.85 | 0.09 | 0.15 | 0.00 | 0.35 | 1.58 | 1.12 | 1.78 | b | 0.83 | 0.31 | 7.35 | ||||||||||||
1962 | 0.33 | 0.46 | 0.28 | 0.00 | 0.00 | 0.86 | 0.48 | 0.78 | 1.58 | 1.14 | 0.89 | 0.20 | 7.00 | |||||||||||||
1963 | 0.16 | 1.29 | 0.25 | 0.29 | 0.00 | 0.00 | 0.21 | 2.11 | 1.27 | 1.09 | 0.76 | 0.16 | 7.59 | |||||||||||||
1964 | 0.06 | 0.09 | 0.12 | 0.60 | 0.16 | 0.12 | 2.21 | 2.53 | 1.75 | 0.04 | 0.53 | 0.71 | 8.92 | |||||||||||||
1965 | 0.87 | 0.36 | 0.95 | 0.21 | 0.22 | 1.06 | 1.01 | 0.90 | 0.84 | 0.53 | 0.39 | 1.47 | 8.81 | |||||||||||||
1966 | 0.15 | 0.66 | 0.04 | 0.22 | 0.00 | 0.33 | 2.99 | 2.05 | 1.65 | 0.61 | 0.34 | 0.74 | 9.78 | |||||||||||||
1967 | 0.14 | 0.00 | 0.22 | 0.18 | 0.47 | 0.15 | 0.94 | 3.71 | 1.10 | 0.21 | 0.55 | 1.75 | 9.42 | |||||||||||||
1968 | 0.22 | 0.72 | 1.03 | 0.62 | 0.06 | 0.17 | 1.80 | 3.91 | 0.05 | 1.79 | 0.24 | 0.50 | 11.11 | |||||||||||||
1969 | 0.41 | 0.39 | 0.90 | 0.00 | 1.41 | 0.03 | 0.90 | 1.68 | 1.92 | 0.97 | 1.13 | 0.49 | 10.23 | |||||||||||||
1970 | 0.49 | 0.16 | 0.94 | 0.89 | 0.05 | 0.11 | 1.50 | 0.89 | 2.44 | 0.55 | 0.01 | 0.16 | 8.19 | |||||||||||||
1971 | 0.17 | 0.15 | 0.00 | 0.49 | 0.00 | 0.00 | 0.78 | 1.16 | 3.07 | 1.60 | 0.30 | 0.63 | 8.35 | |||||||||||||
1972 | 0.00 | 0.00 | 0.00 | 0.00 | 1.13 | 0.72 | 0.44 | 0.82 | 0.54 | 3.95 | 0.64 | 0.45 | 8.69 | |||||||||||||
1973 | 0.21 | 1.41 | 0.83 | 1.29 | 1.77 | 0.58 | 0.29 | 1.13 | 0.01 | 0.05 | 0.81 | 0.00 | 8.38 | |||||||||||||
1974 | 1.00 | 0.04 | 0.29 | 0.00 | 0.00 | 0.00 | 1.43 | 2.03 | 0.34 | 3.07 | 0.07 | 0.05 | 8.32 | |||||||||||||
1975 | 0.31 | 0.80 | 0.90 | 0.45 | 0.38 | 0.02 | 1.20 | 0.62 | 2.36 | 0.00 | 0.44 | 0.56 | 8.04 | |||||||||||||
1976 | 0.23 | 0.30 | 0.17 | 0.10 | 1.25 | 0.03 | 1.58 | 0.66 | 1.39 | 0.73 | 0.03 | 0.29 | 6.76 | |||||||||||||
1977 | 1.64 | 0.30 | 0.48 | 0.47 | 0.02 | 0.14 | 2.19 | 0.62 | 1.29 | 1.09 | 0.40 | 0.37 | 9.01 | |||||||||||||
1978 | 1.22 | 0.95 | 1.62 | 0.08 | 0.82 | 0.12 | 0.34 | 1.21 | 0.57 | 1.37 | 2.09 | 1.76 | 12.15 | |||||||||||||
1979 | 0.85 | 0.05 | 0.87 | 0.14 | 1.84 | 0.78 | 0.17 | 1.65 | 0.06 | 0.91 | 0.96 | 0.67 | 8.95 | |||||||||||||
1980 | 1.23 | f | 1.78 | 0.98 | 0.26 | 0.22 | 0.00 | 0.60 | 1.24 | 1.57 | 0.67 | 0.00 | 0.96 | 8.28 | a | |||||||||||
1981 | 0.72 | 0.63 | 1.39 | 0.54 | 0.38 | 0.14 | a | 2.04 | 1.50 | 0.61 | 1.10 | 0.49 | 0.00 | 9.54 | ||||||||||||
1982 | 1.18 | i | 0.88 | 0.78 | 0.07 | 0.86 | 0.30 | 0.96 | 1.00 | 2.85 | a | 0.04 | 0.99 | 1.40 | 10.13 | a | ||||||||||
1983 | 0.32 | 0.33 | 0.74 | 0.18 | 0.26 | 0.05 | 2.07 | 2.03 | 2.55 | 1.23 | 0.51 | a | 0.83 | 11.10 | ||||||||||||
1984 | ----- | z | 0.00 | 1.32 | 0.33 | 0.01 | 0.77 | 2.79 | 2.40 | 3.45 | 1.50 | 0.09 | 1.73 | 14.39 | a | |||||||||||
1985 | 1.07 | 0.70 | 1.05 | 1.54 | 0.15 | 0.17 | 2.63 | 0.51 | 1.46 | 1.98 | 0.90 | 0.10 | 12.26 | |||||||||||||
1986 | 0.05 | 0.87 | 1.15 | 0.17 | 0.21 | 0.20 | 3.37 | 1.25 | 0.85 | 1.67 | 1.23 | 1.79 | 12.81 | |||||||||||||
1987 | 0.53 | a | 0.69 | 0.35 | a | 0.23 | 0.67 | 0.16 | 1.26 | 1.19 | 0.29 | 1.10 | 1.19 | 0.60 | a | 8.26 | ||||||||||
1988 | 0.43 | 0.60 | 0.00 | 2.18 | 0.01 | 1.95 | 0.55 | 2.33 | 1.15 | 0.36 | 0.73 | 0.10 | 10.39 | |||||||||||||
1989 | 0.76 | 0.14 | 1.17 | a | 0.00 | 0.00 | 0.00 | 2.59 | 2.01 | 1.06 | 0.52 | 0.00 | 0.25 | 8.50 | ||||||||||||
1990 | 0.05 | 0.26 | 0.47 | 0.49 | 0.26 | 0.00 | 2.60 | 1.94 | 2.36 | 0.61 | 1.83 | 1.56 | a | 12.43 | ||||||||||||
1991 | 1.27 | 2.24 | 0.95 | 0.00 | 0.09 | 0.63 | 0.39 | 1.06 | 0.78 | 0.02 | 0.63 | 1.59 | 9.65 | |||||||||||||
1992 | 0.71 | 0.54 | 1.36 | 0.48 | 2.82 | 0.31 | 2.11 | 3.29 | 0.26 | 0.95 | a | 0.62 | 2.12 | 15.57 | ||||||||||||
1993 | 2.40 | 1.02 | 0.44 | 0.57 | 0.29 | 0.00 | 0.09 | 4.81 | 0.35 | 1.98 | 2.91 | 1.28 | 16.14 | |||||||||||||
1994 | 0.66 | 0.28 | 1.28 | 0.56 | 1.29 | 0.48 | 0.61 | 2.06 | 1.27 | 2.86 | 2.35 | 1.34 | a | 15.04 | ||||||||||||
1995 | 0.49 | 0.67 | 0.73 | 0.36 | 0.38 | 0.01 | 0.24 | 1.91 | 1.79 | 0.00 | 0.39 | 0.63 | n | 6.97 | a | |||||||||||
1996 | 0.03 | e | 0.31 | 0.12 | 0.09 | 0.08 | 0.51 | 0.63 | 1.64 | 2.79 | 1.05 | 0.95 | 0.08 | 8.28 | ||||||||||||
1997 | 1.12 | 0.33 | 0.00 | 0.25 | 0.41 | 0.18 | 1.77 | 1.29 | 3.01 | 0.65 | 0.75 | 1.95 | 11.71 | |||||||||||||
1998 | 0.24 | 0.81 | 2.28 | 0.49 | 0.12 | 0.00 | 3.67 | 0.65 | 0.24 | 1.88 | 0.50 | 0.45 | 11.33 | |||||||||||||
1999 | 0.16 | 0.12 | 0.11 | 0.73 | 0.18 | 0.27 | 3.39 | 2.90 | 1.41 | 0.00 | 0.00 | 0.00 | 9.27 | |||||||||||||
2000 | 0.10 | 0.36 | 2.24 | 0.09 | 0.02 | 0.42 | 0.82 | 1.59 | 0.17 | 3.13 | 0.96 | 0.16 | 10.06 | |||||||||||||
2001 | 0.70 | 0.47 | 0.25 | 1.34 | 0.59 | 0.01 | 1.68 | 1.66 | 0.22 | 0.40 | 0.00 | 1.19 | 8.51 | |||||||||||||
2002 | 0.24 | 0.02 | 0.18 | 0.71 | 0.00 | 0.00 | 2.21 | 0.64 | 2.04 | 0.39 | 0.77 | 1.23 | 8.43 | |||||||||||||
2003 | 0.20 | m | 1.63 | 0.47 | 0.21 | 0.01 | 0.26 | 0.10 | 1.35 | 0.32 | 0.53 | 0.36 | 0.18 | a | 5.42 | a | ||||||||||
2004 | 0.34 | 0.38 | 0.42 | 1.60 | 0.00 | 0.26 | 2.34 | 2.25 | 1.22 | 1.11 | 0.62 | 0.54 | 11.08 | |||||||||||||
2005 | 0.89 | 2.51 | 0.89 | i | 0.00 | a | 0.00 | 0.05 | 0.38 | 1.80 | 0.28 | 0.19 | 0.04 | 0.01 | 6.15 | a | ||||||||||
2006 | 0.48 | a | 0.00 | 0.78 | a | 0.07 | 0.00 | 0.09 | 3.00 | 0.98 | 0.90 | 1.13 | 0.00 | 0.26 | 7.69 | |||||||||||
2007 | 0.49 | 0.98 | 0.42 | 0.09 | 0.42 | 0.18 | 5.02 | 1.60 | 0.48 | 0.04 | a | 0.02 | 1.03 | a | 10.77 | |||||||||||
2008 | 1.00 | a | 0.95 | 0.00 | 0.06 | 0.36 | 0.39 | 2.21 | 1.73 | a | 0.35 | 0.54 | 0.67 | 0.46 | 8.72 | |||||||||||
2009 | 0.59 | 0.23 | 0.35 | 0.35 | 0.66 | 0.30 | 0.32 | a | 1.53 | 0.14 | 0.33 | 0.10 | 0.75 | 5.65 | ||||||||||||
2010 | 0.72 | 0.16 | 0.45 | 0.17 | 0.25 | 0.00 | 2.07 | 2.28 | 3.94 | 0.29 | 0.10 | 2.43 | a | 12.86 | ||||||||||||
2011 | ----- | z | 0.54 | o | 0.56 | y | 0.31 | 0.75 | 0.00 | 1.58 | 1.17 | a | 2.02 | 0.67 | 0.36 | 1.67 | a | 8.53 | c | |||||||
2012 | 0.33 | 0.62 | 0.60 | 0.18 | 0.00 | 0.06 | 1.93 | 2.62 | 0.22 | 0.00 | 0.26 | 0.48 | a | 7.30 | ||||||||||||
2013 | 0.40 | 0.21 | 0.34 | 0.39 | 0.13 | 0.00 | 2.49 | 1.95 | 0.67 | 0.03 | q | 2.17 | 0.06 | 8.81 | a | |||||||||||
2014 | 0.00 | 0.04 | 1.30 | 0.23 | 0.12 | 0.00 | 0.88 | 1.13 | 1.59 | 0.88 | d | 0.09 | 1.85 | a | 8.11 | |||||||||||
2015 | 2.10 | 0.60 | 0.32 | 0.11 | 1.73 | 1.63 | 2.36 | 1.08 | 0.95 | 2.21 | 0.97 | 0.69 | 14.75 | |||||||||||||
2016 | 0.15 | 0.00 | 0.03 | 0.64 | 0.77 | 0.09 | 0.81 | 2.41 | 0.54 | 0.65 | 0.83 | 0.94 | 7.86 | |||||||||||||
2017 | 0.81 | 0.65 | 0.50 | 0.36 | 0.48 | 0.12 | 4.10 | 0.10 | 0.57 | 0.01 | 0.00 | 0.00 | 7.70 | |||||||||||||
2018 | 0.19 | 0.25 | 0.50 | 0.14 | 0.18 | 0.77 | 0.81 | 0.61 | 0.42 | 3.75 | 0.11 | 0.04 | j | 7.73 | a | |||||||||||
2019 | ----- | z | 0.93 | e | 0.90 | 0.15 | 0.87 | 0.08 | 0.39 | 0.41 | 1.28 | 0.07 | 2.20 | 0.82 | a | 8.10 | a | |||||||||
2020 | 1.10 | 1.11 | a | 0.73 | 0.89 | 0.00 | 0.02 | 0.75 | 0.14 | 0.34 | 0.35 | 0.22 | 0.23 | 5.88 | ||||||||||||
2021 | 0.47 | 0.66 | 0.92 | 0.21 | 0.00 | 0.09 | 3.53 | 1.56 | 1.73 | 1.01 | ----- | z | ----- | z | 10.18 | b | ||||||||||
2022 | 0.96 | 0.61 | 1.18 | a | 0.00 | 0.00 | 0.44 | 2.77 | 2.41 | 3.18 | 3.26 | 0.60 | 2.09 | 17.50 | ||||||||||||
2023 | 3.26 | 0.65 | 0.97 | 0.09 | 0.77 | 0.50 | 0.34 | 2.55 | b | 1.17 | 0.10 | 0.97 | 0.98 | 12.35 | ||||||||||||
2024 | 0.84 | 0.28 | 2.87 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 3.99 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.59 | 0.59 | 0.63 | 0.42 | 0.41 | 0.29 | 1.52 | 1.66 | 1.19 | 0.97 | 0.62 | 0.70 | 9.49 | |||||||||||||
S.D. | 0.57 | 0.50 | 0.54 | 0.48 | 0.51 | 0.40 | 1.11 | 0.92 | 0.92 | 0.93 | 0.64 | 0.61 | 2.62 | |||||||||||||
SKEW | 2.07 | 1.43 | 1.43 | 1.83 | 2.00 | 2.23 | 0.93 | 0.95 | 0.76 | 1.39 | 1.68 | 0.89 | 0.81 | |||||||||||||
MAX | 3.26 | 2.51 | 2.87 | 2.18 | 2.82 | 1.95 | 5.02 | 4.81 | 3.94 | 3.95 | 2.91 | 2.43 | 17.50 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.09 | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 3.85 | |||||||||||||
YRS | 86 | 92 | 88 | 93 | 92 | 91 | 91 | 92 | 90 | 89 | 91 | 89 | 70 |