YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1934 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 1.03 | 1.56 | 1.21 | a | 0.86 | 4.66 | g | ||||
1935 | 0.35 | 0.77 | 0.26 | ----- | z | ----- | z | 1.18 | l | 1.07 | f | 0.58 | ----- | z | 0.75 | 0.38 | 1.28 | 4.37 | e | |||||||
1936 | 0.99 | a | 0.95 | a | 0.14 | 0.94 | y | 0.80 | 2.44 | 0.10 | 0.07 | 0.33 | 0.05 | 0.14 | 0.54 | 6.55 | a | |||||||||
1937 | 0.91 | 1.09 | 0.98 | 1.75 | 0.25 | 4.29 | 0.36 | 0.18 | 0.57 | 1.10 | 2.58 | 1.24 | 15.30 | |||||||||||||
1938 | 1.17 | 1.03 | 1.70 | 0.30 | 0.04 | 0.25 | 0.15 | 0.03 | 0.16 | 0.69 | 0.35 | 0.73 | 6.60 | |||||||||||||
1939 | 0.72 | 0.61 | 0.79 | 0.68 | 0.28 | 0.90 | 0.03 | 0.04 | 0.14 | 0.59 | 0.20 | 1.73 | 6.71 | |||||||||||||
1940 | 1.04 | 3.58 | 0.99 | 1.32 | 0.37 | 0.13 | 1.02 | 0.00 | 1.07 | 1.43 | 1.13 | 1.89 | 13.97 | |||||||||||||
1941 | 1.65 | 0.99 | 0.44 | 0.91 | 2.70 | 1.88 | 0.30 | 1.75 | 1.42 | 0.33 | 1.63 | 1.87 | 15.87 | |||||||||||||
1942 | 1.09 | 1.21 | 0.22 | 0.91 | 2.17 | 2.22 | 0.74 | 0.13 | 0.15 | 0.27 | 1.75 | 1.09 | 11.95 | |||||||||||||
1943 | 0.41 | ----- | z | 0.65 | 0.58 | 0.56 | 1.12 | 0.00 | 0.68 | 0.00 | 1.09 | 0.30 | 0.71 | 6.10 | a | |||||||||||
1944 | 1.10 | 1.01 | 0.13 | 1.77 | 0.56 | 1.70 | 0.02 | 0.11 | 0.40 | 0.23 | 3.41 | 0.64 | 11.08 | |||||||||||||
1945 | 1.75 | 1.17 | 1.11 | 0.35 | 2.25 | 0.64 | 0.01 | 0.14 | 0.70 | 0.68 | 1.56 | 1.66 | 12.02 | |||||||||||||
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1947 | 0.32 | 0.23 | 0.36 | 1.03 | q | 0.58 | 0.55 | 0.74 | 0.00 | 0.78 | 2.95 | 0.13 | 1.29 | 7.93 | a | |||||||||||
1948 | 0.89 | 0.58 | 0.05 | 2.31 | 5.52 | 3.26 | 1.60 | 1.57 | 1.50 | 0.52 | 1.03 | 1.54 | 20.37 | |||||||||||||
1949 | 0.42 | 0.98 | 0.94 | 0.07 | 0.15 | 0.34 | 0.16 | 0.12 | 0.29 | 0.64 | 1.64 | 0.27 | 6.02 | |||||||||||||
1950 | 1.60 | 1.30 | 1.60 | 0.67 | 1.65 | 1.51 | 0.23 | ----- | z | 0.07 | 2.51 | 1.61 | 2.21 | 14.96 | a | |||||||||||
1951 | 1.09 | 0.89 | 0.79 | 0.10 | 0.19 | 1.35 | 0.25 | 1.29 | 0.72 | 2.31 | 1.10 | 1.30 | 11.38 | |||||||||||||
1952 | 1.52 | 0.56 | 0.40 | 0.69 | 0.57 | 1.23 | 0.08 | 0.02 | 0.22 | 0.00 | 0.37 | 1.29 | 6.95 | |||||||||||||
1953 | 2.03 | 0.51 | 0.56 | 0.68 | 1.59 | 0.90 | 0.01 | 1.22 | 0.08 | 0.18 | 1.03 | 0.91 | 9.70 | |||||||||||||
1954 | 1.06 | 0.38 | 0.69 | 0.23 | 1.23 | 0.85 | 0.37 | 0.64 | 1.51 | 0.05 | 1.49 | 0.52 | 9.02 | |||||||||||||
1955 | 1.12 | 0.05 | 0.47 | 1.81 | 0.49 | 0.59 | 1.32 | 0.00 | 0.86 | 0.66 | 1.48 | 1.59 | 10.44 | |||||||||||||
1956 | 2.08 | 0.70 | 0.32 | 0.81 | 0.47 | 1.13 | 0.20 | 1.20 | 0.03 | 1.53 | 0.29 | 0.51 | 9.27 | |||||||||||||
1957 | 1.13 | 0.83 | 1.78 | 0.32 | 2.00 | 0.56 | 0.27 | 0.35 | 0.16 | 2.17 | 0.75 | 0.80 | 11.12 | |||||||||||||
1958 | 1.73 | 2.26 | 0.60 | 1.05 | 0.51 | 1.14 | 0.70 | 0.00 | 0.37 | 0.46 | 1.65 | 1.29 | 11.76 | |||||||||||||
1959 | 2.52 | 1.09 | 0.72 | 0.12 | 2.00 | 0.41 | 0.02 | 0.21 | 1.48 | 0.45 | 1.09 | 0.68 | 10.79 | |||||||||||||
1960 | 1.11 | 1.16 | 0.97 | 0.37 | 2.26 | 0.15 | 0.00 | 0.23 | 0.57 | 0.37 | 2.30 | 1.40 | 10.89 | |||||||||||||
1961 | 0.40 | 2.39 | 1.85 | 1.26 | 1.72 | 0.70 | 0.19 | 0.87 | 0.02 | 0.27 | 0.85 | 1.76 | 12.28 | |||||||||||||
1962 | 0.48 | 1.10 | 0.93 | 0.69 | 1.99 | 0.39 | 0.02 | 0.80 | 0.64 | 1.36 | 1.30 | 1.30 | 11.00 | |||||||||||||
1963 | 0.25 | 1.03 | 0.52 | 1.43 | 0.64 | 0.18 | 0.36 | 0.03 | 1.30 | 0.15 | 1.75 | 1.44 | 9.08 | |||||||||||||
1964 | 1.03 | 0.11 | 0.37 | 0.20 | 0.17 | 1.21 | 0.02 | 0.57 | 0.15 | 0.16 | 1.69 | 3.20 | 8.88 | |||||||||||||
1965 | 0.83 | 0.25 | 0.13 | 1.52 | 0.17 | 0.90 | 1.71 | 0.44 | 0.16 | 0.15 | 1.98 | 1.22 | 9.46 | |||||||||||||
1966 | 0.71 | 0.03 | 0.41 | 0.09 | 0.30 | 1.02 | 1.04 | 0.17 | 0.47 | 0.23 | 2.05 | 1.57 | 8.09 | |||||||||||||
1967 | 0.73 | 0.15 | 0.30 | 0.92 | 0.95 | 0.98 | 0.05 | 0.04 | 0.06 | 0.68 | 0.70 | 1.40 | 6.96 | |||||||||||||
1968 | 1.44 | 0.96 | 0.08 | 0.44 | 0.79 | 0.27 | 0.17 | 1.71 | 0.10 | 1.05 | 1.93 | 2.11 | 11.05 | |||||||||||||
1969 | 1.58 | 1.00 | 0.04 | 1.68 | 1.38 | 1.22 | 0.44 | 0.00 | 0.52 | 0.35 | 0.32 | 1.97 | 10.50 | |||||||||||||
1970 | 2.43 | 0.73 | 0.93 | 0.29 | 0.38 | 0.25 | 0.06 | 0.00 | 0.33 | 0.70 | 1.48 | 1.77 | 9.35 | |||||||||||||
1971 | 1.74 | 0.69 | 1.29 | 0.90 | 0.73 | 1.15 | 0.25 | 0.09 | 0.97 | 0.83 | 0.59 | 1.79 | 11.02 | |||||||||||||
1972 | 0.49 | 0.26 | 1.02 | 0.66 | 3.09 | 1.24 | 0.16 | 1.17 | 0.86 | 0.38 | 1.25 | 1.68 | 12.26 | |||||||||||||
1973 | 1.18 | 0.23 | 0.41 | 0.04 | 0.22 | 0.31 | 0.06 | 0.16 | 0.82 | 1.01 | 3.95 | 2.79 | 11.18 | |||||||||||||
1974 | 0.70 | 0.99 | 1.19 | 0.65 | 0.48 | 0.07 | 1.18 | 0.00 | 0.13 | 0.04 | 1.72 | 2.58 | 9.73 | |||||||||||||
1975 | 1.05 | 1.69 | 1.26 | 1.16 | 1.68 | 0.50 | 0.27 | 1.06 | 0.01 | 1.41 | 0.46 | 1.45 | 12.00 | |||||||||||||
1976 | 0.61 | 0.63 | 0.61 | 0.96 | 0.91 | 0.92 | 0.33 | 1.28 | 0.09 | 0.28 | 0.13 | 0.26 | 7.01 | |||||||||||||
1977 | 0.35 | 0.14 | 0.65 | 0.03 | 0.98 | 0.57 | 0.19 | 1.03 | 0.61 | 0.14 | 0.85 | 2.76 | 8.30 | |||||||||||||
1978 | 1.35 | 1.34 | 0.95 | 1.65 | 0.58 | 0.05 | 1.65 | 1.36 | 0.70 | 0.00 | 0.69 | 0.68 | 11.00 | |||||||||||||
1979 | 0.36 | 0.92 | 0.06 | 0.61 | 0.89 | 0.46 | 0.10 | 0.84 | 0.42 | 1.09 | 1.41 | 1.36 | 8.52 | |||||||||||||
1980 | 2.04 | 3.12 | 1.11 | 1.48 | 3.32 | 0.99 | 0.06 | 0.47 | 1.53 | 0.90 | 1.01 | 1.97 | 18.00 | |||||||||||||
1981 | 0.77 | 1.68 | 0.48 | 0.05 | 2.90 | 0.90 | 0.82 | 0.17 | 0.69 | 1.31 | 0.64 | 2.03 | 12.44 | |||||||||||||
1982 | 0.61 | 0.76 | 1.05 | 0.59 | 0.41 | 1.41 | 0.63 | 0.26 | 0.53 | 0.84 | 1.43 | 1.14 | a | 9.66 | ||||||||||||
1983 | 1.24 | 1.93 | 2.64 | 0.92 | 0.84 | 0.41 | h | 1.62 | 0.35 | 0.37 | 0.53 | 3.54 | 2.09 | 16.07 | a | |||||||||||
1984 | 0.48 | 0.92 | a | 1.43 | 1.19 | 1.16 | 2.62 | 0.76 | 0.03 | 0.24 | 0.53 | 3.07 | 0.57 | 13.00 | ||||||||||||
1985 | 0.30 | 0.69 | 0.18 | 0.00 | 0.29 | 0.29 | 0.03 | 0.04 | 2.08 | 0.55 | 1.87 | 0.96 | 7.28 | |||||||||||||
1986 | 2.19 | 2.15 | 0.95 | 0.95 | 0.46 | 0.05 | 0.13 | 0.02 | 2.08 | 0.58 | 0.43 | 0.67 | 10.66 | |||||||||||||
1987 | 0.97 | 0.21 | 2.29 | 0.31 | 0.95 | 0.49 | ----- | z | ----- | z | 0.00 | 0.03 | 0.47 | 1.77 | 7.49 | b | ||||||||||
1988 | 0.67 | 0.03 | 0.55 | 0.98 | 1.09 | 0.69 | 0.00 | 0.00 | 0.42 | 0.31 | 2.15 | 0.87 | 7.76 | |||||||||||||
1989 | 0.32 | 0.46 | a | 1.38 | 0.69 | 2.45 | 0.33 | 0.03 | 0.97 | 0.02 | 0.45 | 0.77 | 0.31 | 8.18 | ||||||||||||
1990 | 1.12 | 0.54 | 0.36 | 1.25 | 1.95 | 1.86 | 1.27 | 1.43 | 0.00 | 0.87 | 0.20 | 0.40 | 11.25 | |||||||||||||
1991 | 0.95 | 0.59 | 0.93 | 0.39 | 2.06 | 2.12 | 0.50 | 0.49 | 0.20 | 0.21 | 2.10 | 0.49 | 11.03 | |||||||||||||
1992 | 1.62 | 0.93 | 0.68 | 1.10 | 0.12 | 0.97 | 1.92 | 0.10 | 0.15 | 0.62 | 1.33 | b | 1.93 | 11.47 | ||||||||||||
1993 | 0.50 | 0.79 | 0.78 | 2.19 | ----- | z | 1.77 | 2.94 | 0.59 | 0.53 | 0.04 | 0.17 | 1.99 | 12.29 | a | |||||||||||
1994 | 0.39 | 0.44 | 0.14 | 1.67 | 1.57 | 0.67 | 0.09 | 0.04 | 0.07 | 0.65 | 1.21 | 1.23 | 8.17 | |||||||||||||
1995 | 2.11 | 0.66 | 2.07 | a | 0.77 | 1.16 | 1.55 | 0.52 | 0.11 | 0.69 | 0.81 | 1.74 | 1.89 | 14.08 | ||||||||||||
1996 | 1.04 | a | 1.75 | 0.48 | 1.27 | 1.61 | 2.58 | 0.39 | 0.03 | 0.70 | 1.63 | 1.38 | 3.44 | a | 16.30 | |||||||||||
1997 | 1.11 | 1.50 | 1.35 | 1.26 | 1.72 | 0.96 | 1.78 | 1.12 | 1.00 | 1.16 | 0.93 | 0.66 | 14.55 | |||||||||||||
1998 | ----- | z | 1.46 | 1.12 | 0.52 | a | 1.70 | ----- | z | 0.45 | 0.02 | 0.12 | 0.21 | 1.65 | 2.37 | 9.62 | b | |||||||||
1999 | 0.93 | 1.82 | 0.49 | 0.31 | 1.14 | 0.94 | 1.02 | 0.55 | 0.01 | 0.08 | 1.45 | 1.15 | 9.89 | |||||||||||||
2000 | 1.31 | 1.09 | a | 1.55 | 0.58 | 0.81 | 0.55 | c | 0.51 | 0.00 | 0.08 | 0.37 | a | 0.97 | 1.09 | c | 8.91 | |||||||||
2001 | 0.53 | a | 0.48 | 1.24 | 0.51 | 0.35 | 0.68 | a | 0.06 | 0.12 | 0.14 | 0.67 | a | 2.11 | 1.84 | 8.73 | ||||||||||
2002 | 1.03 | 0.65 | a | 0.20 | 0.19 | 0.61 | a | 0.32 | 0.10 | 0.06 | a | 0.03 | 0.07 | a | 0.98 | 2.69 | a | 6.93 | ||||||||
2003 | 2.40 | 0.67 | 0.68 | a | 1.55 | 0.28 | 0.04 | a | 0.00 | 0.28 | 0.27 | 0.45 | 0.27 | 0.64 | b | 7.53 | ||||||||||
2004 | 0.69 | g | 0.83 | a | 0.61 | b | 0.54 | d | 0.90 | 0.28 | 0.17 | 1.07 | 0.48 | a | 0.87 | 0.11 | a | 0.91 | 6.77 | a | ||||||
2005 | 0.98 | 0.01 | 0.58 | 1.55 | 2.42 | 1.27 | 0.24 | k | 0.10 | 0.08 | 1.19 | 1.52 | e | 2.32 | 12.02 | a | ||||||||||
2006 | 2.22 | 1.02 | 0.81 | a | 2.01 | 1.35 | 1.40 | 0.16 | 0.00 | 0.27 | 1.49 | 1.46 | 0.83 | 13.02 | ||||||||||||
2007 | 0.22 | 0.44 | 0.47 | 0.28 | 0.20 | 1.35 | b | 0.62 | 0.25 | 0.63 | 0.53 | 1.01 | 0.88 | 6.88 | ||||||||||||
2008 | 1.10 | 0.18 | 0.97 | 0.47 | 0.24 | 0.87 | a | 0.15 | a | 0.15 | 0.24 | 0.45 | 1.33 | 1.66 | a | 7.81 | ||||||||||
2009 | 0.82 | 0.69 | 0.53 | 0.62 | 0.71 | 0.21 | 0.47 | 0.01 | 0.13 | 1.13 | a | 0.87 | 1.01 | 7.20 | ||||||||||||
2010 | 1.06 | 1.25 | 0.69 | 0.75 | a | 2.15 | 2.31 | 0.10 | 0.04 | 1.19 | 1.15 | 1.03 | 0.99 | 12.71 | ||||||||||||
2011 | 0.48 | 0.48 | 2.19 | 1.73 | 2.60 | 0.51 | 0.23 | 0.00 | 0.14 | 0.65 | 0.55 | 0.46 | 10.02 | |||||||||||||
2012 | 0.90 | 0.61 | 4.13 | 1.15 | 0.45 | 3.66 | 0.50 | 0.00 | 0.00 | a | 1.42 | a | 1.75 | 1.23 | 15.80 | |||||||||||
2013 | 0.67 | 0.14 | 0.83 | 0.84 | 0.93 | 1.55 | 0.43 | 1.14 | 0.65 | 0.16 | 0.81 | 0.09 | 8.24 | |||||||||||||
2014 | 0.49 | 0.65 | 1.41 | 1.23 | 0.84 | 1.39 | 0.06 | 1.76 | 0.35 | 1.73 | 1.44 | 1.43 | 12.78 | |||||||||||||
2015 | 1.04 | 0.96 | 0.82 | 0.23 | 0.91 | 0.09 | 0.43 | 0.03 | 0.06 | 0.76 | 0.99 | 3.23 | 9.55 | |||||||||||||
2016 | 1.90 | 0.43 | 1.82 | 0.65 | 0.96 | 1.28 | 0.58 | 0.00 | 0.42 | 3.98 | 1.43 | 0.79 | 14.24 | |||||||||||||
2017 | 1.17 | 2.67 | 1.80 | 1.78 | 1.31 | a | 0.70 | 0.00 | 0.00 | 0.16 | 0.73 | 1.50 | 0.72 | 12.54 | ||||||||||||
2018 | 2.04 | 0.74 | 1.40 | 1.40 | 0.55 | 0.15 | 0.03 | 0.04 | 0.02 | 1.45 | 0.94 | 1.29 | 10.05 | |||||||||||||
2019 | 0.94 | 0.96 | 0.97 | 0.74 | 1.57 | 0.03 | 0.27 | 1.27 | 1.71 | 0.85 | 0.22 | 0.76 | 10.29 | |||||||||||||
2020 | 1.75 | 0.86 | 0.36 | 0.21 | 1.17 | 1.78 | 0.02 | 0.30 | 0.60 | 0.93 | 1.08 | 2.37 | 11.43 | |||||||||||||
2021 | 1.56 | 0.26 | 0.12 | 0.40 | 0.06 | 0.55 | 0.00 | 0.50 | 0.90 | 0.95 | 1.73 | a | 0.80 | 7.83 | ||||||||||||
2022 | 0.63 | a | 0.09 | 0.63 | 1.14 | 0.79 | 2.34 | a | 0.60 | 0.00 | c | 0.02 | 0.12 | 1.86 | 2.59 | 10.81 | ||||||||||
2023 | 1.67 | 0.28 | 0.56 | 2.35 | 1.51 | a | 0.51 | 0.14 | 1.62 | b | 0.93 | a | 0.83 | a | 1.49 | 1.76 | 13.65 | |||||||||
2024 | 1.56 | 0.80 | 0.74 | a | 0.78 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 3.88 | h | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.10 | 0.89 | 0.87 | 0.87 | 1.14 | 1.02 | 0.44 | 0.43 | 0.50 | 0.78 | 1.24 | 1.38 | 10.64 | |||||||||||||
S.D. | 0.58 | 0.67 | 0.66 | 0.58 | 0.92 | 0.84 | 0.55 | 0.53 | 0.50 | 0.68 | 0.77 | 0.73 | 2.80 | |||||||||||||
SKEW | 0.59 | 1.58 | 1.85 | 0.58 | 1.68 | 1.46 | 2.02 | 1.10 | 1.29 | 1.89 | 0.94 | 0.64 | 0.84 | |||||||||||||
MAX | 2.52 | 3.58 | 4.13 | 2.35 | 5.52 | 4.29 | 2.94 | 1.76 | 2.08 | 3.98 | 3.95 | 3.44 | 20.37 | |||||||||||||
MIN | 0.22 | 0.01 | 0.04 | 0.00 | 0.04 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.11 | 0.09 | 6.02 | |||||||||||||
YRS | 87 | 88 | 89 | 86 | 86 | 85 | 85 | 87 | 88 | 89 | 89 | 89 | 77 |