YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1941 | ----- | z | ----- | z | 0.78 | 0.58 | 0.86 | 0.50 | 0.00 | 0.62 | 0.58 | 0.46 | 1.02 | 2.22 | ----- | z | ||||||||||
1942 | 0.46 | 0.42 | 0.36 | 0.48 | 0.48 | 1.00 | 0.46 | 0.16 | 0.02 | 1.32 | 1.35 | 0.53 | 1.35 | |||||||||||||
1943 | 0.42 | 1.00 | 0.76 | 0.75 | 0.36 | 1.08 | 0.16 | 0.38 | f | 0.81 | 0.98 | a | 0.62 | 0.83 | 1.08 | g | ||||||||||
1944 | 0.83 | a | 0.57 | 0.90 | 0.70 | 0.38 | 0.36 | 0.10 | 0.14 | 0.54 | 0.35 | 0.66 | 0.31 | 0.90 | a | |||||||||||
1945 | 0.73 | 0.90 | 0.78 | 1.27 | 0.90 | 0.09 | 0.36 | 0.71 | 1.39 | 0.64 | 1.15 | 1.33 | 1.39 | |||||||||||||
1946 | 1.33 | 1.20 | 0.72 | 0.42 | 0.33 | 0.89 | 1.78 | 0.06 | 1.06 | 0.62 | 1.93 | 1.29 | 1.93 | |||||||||||||
1947 | 1.27 | 1.10 | 0.53 | 0.50 | 0.13 | 0.96 | 0.38 | 0.19 | 0.39 | 1.30 | 0.98 | 0.66 | 1.30 | |||||||||||||
1948 | 0.80 | 1.05 | 1.86 | 0.59 | 0.91 | 0.85 | 0.81 | 0.40 | 0.96 | 1.01 | 0.89 | 1.18 | 1.86 | |||||||||||||
1949 | 0.37 | 1.44 | 0.80 | 0.63 | 0.69 | 0.38 | 0.23 | 0.43 | 0.75 | 1.82 | 1.78 | 1.43 | 1.82 | |||||||||||||
1950 | 1.83 | 1.26 | 1.53 | 0.58 | 0.36 | 0.56 | 0.44 | 0.40 | 0.87 | 1.24 | 1.24 | 1.70 | 1.83 | |||||||||||||
1951 | 0.73 | 2.20 | 0.72 | 0.31 | 0.48 | 0.05 | 0.05 | 0.68 | 1.38 | 0.80 | 0.70 | 0.68 | 2.20 | |||||||||||||
1952 | 0.80 | 1.09 | 0.63 | 0.78 | 0.46 | 0.23 | 0.28 | 0.20 | 0.06 | 0.57 | 0.39 | 0.79 | 1.09 | |||||||||||||
1953 | 1.14 | 0.63 | 1.08 | 0.40 | 0.91 | 0.84 | 0.16 | 0.53 | 0.63 | 1.30 | 1.60 | 1.18 | 1.60 | |||||||||||||
1954 | 1.95 | 1.23 | 0.70 | 0.67 | 0.44 | 0.66 | 0.47 | 0.66 | 0.67 | 1.00 | 0.96 | 0.53 | 1.95 | |||||||||||||
1955 | 0.53 | 1.38 | 0.70 | 0.58 | 0.66 | 0.31 | 0.68 | 0.14 | 0.74 | 1.40 | 1.41 | 1.61 | 1.61 | |||||||||||||
1956 | 1.24 | 0.40 | 0.80 | 0.26 | 0.38 | 0.53 | 0.27 | 0.48 | 0.46 | 1.01 | 1.31 | 1.12 | 1.31 | |||||||||||||
1957 | 0.64 | 0.70 | 1.22 | 0.40 | 0.64 | 0.80 | 0.53 | 0.57 | 1.26 | 1.05 | 0.78 | 0.81 | 1.26 | |||||||||||||
1958 | 1.38 | 0.70 | 0.27 | 0.70 | 0.46 | 0.40 | 0.02 | 0.11 | 0.44 | 1.75 | 1.23 | 1.34 | 1.75 | |||||||||||||
1959 | 1.23 | 0.41 | 0.60 | 0.57 | 0.51 | 0.74 | 0.16 | 0.27 | 0.84 | 0.99 | 3.06 | 1.15 | 3.06 | |||||||||||||
1960 | 1.00 | 1.21 | 0.61 | 0.81 | 1.13 | 0.59 | 0.00 | 2.48 | 0.64 | 1.02 | 1.94 | 0.83 | 2.48 | |||||||||||||
1961 | 0.97 | 1.22 | 0.46 | 0.48 | 0.41 | 0.40 | 0.22 | 0.50 | 0.36 | 0.61 | 1.17 | 0.92 | 1.22 | |||||||||||||
1962 | 1.00 | 1.00 | 0.67 | 0.73 | 0.64 | 0.29 | 0.17 | 0.54 | 0.74 | 1.45 | 2.00 | 1.14 | 2.00 | |||||||||||||
1963 | 0.74 | 1.65 | 0.93 | 0.93 | 0.31 | 0.32 | 0.46 | 0.62 | 0.28 | 1.32 | 0.82 | 0.83 | 1.65 | |||||||||||||
1964 | 1.99 | 0.62 | 0.51 | 0.37 | 0.72 | 0.87 | 0.76 | 0.25 | 0.41 | 0.91 | 1.86 | 1.67 | 1.99 | |||||||||||||
1965 | 1.36 | 1.01 | 0.22 | 1.49 | 0.39 | 0.22 | 1.08 | 1.05 | 0.28 | 1.08 | 1.00 | 0.95 | 1.49 | |||||||||||||
1966 | 1.06 | 0.71 | 0.92 | 1.02 | 0.54 | 1.00 | 0.77 | 0.12 | 0.82 | 0.98 | 1.21 | 1.25 | 1.25 | |||||||||||||
1967 | 1.47 | 1.21 | 0.54 | 0.58 | 0.39 | 1.51 | 0.10 | 0.00 | 0.72 | 1.35 | 0.60 | 0.52 | 1.51 | |||||||||||||
1968 | 0.66 | 1.58 | 1.40 | 0.47 | 0.82 | 1.94 | 0.18 | 1.12 | 0.95 | 1.06 | 1.45 | 1.38 | 1.94 | |||||||||||||
1969 | 1.30 | 1.03 | 0.50 | 0.80 | 1.13 | 0.66 | 0.17 | 0.32 | 1.46 | 0.64 | 0.92 | 1.13 | 1.46 | |||||||||||||
1970 | 0.90 | 1.18 | 0.76 | 0.68 | 0.52 | 0.21 | 0.20 | 0.14 | 0.51 | 0.57 | 0.63 | 1.72 | 1.72 | |||||||||||||
1971 | 1.71 | 0.68 | 0.80 | 0.81 | 0.42 | 1.20 | 0.43 | 0.35 | 1.64 | 0.75 | 0.70 | 0.80 | 1.71 | |||||||||||||
1972 | 1.42 | 1.25 | 1.51 | 0.58 | 0.40 | 1.16 | 0.56 | 0.45 | 1.15 | 0.27 | 0.65 | 1.29 | 1.51 | |||||||||||||
1973 | 0.93 | 0.50 | 0.73 | 0.65 | 0.78 | 1.04 | 0.04 | 0.10 | 0.68 | 1.23 | 1.32 | 0.89 | 1.32 | |||||||||||||
1974 | 1.02 | 1.04 | 1.00 | 0.57 | 0.44 | 0.92 | 0.52 | 0.07 | 0.15 | 0.60 | 1.39 | 2.67 | 2.67 | |||||||||||||
1975 | 1.29 | 1.24 | 0.58 | 0.33 | 0.49 | 0.31 | 0.22 | 1.52 | 0.01 | 1.12 | 0.92 | 1.05 | 1.52 | |||||||||||||
1976 | 0.95 | 0.75 | 0.42 | 0.52 | 0.57 | 0.54 | 1.02 | 1.42 | 0.67 | 0.46 | 0.38 | 0.90 | 1.42 | |||||||||||||
1977 | 0.24 | 0.48 | 0.77 | 0.21 | 0.60 | 0.71 | 0.07 | 1.44 | 0.56 | 0.51 | 0.71 | 1.49 | 1.49 | |||||||||||||
1978 | 0.73 | 0.49 | 0.39 | 0.80 | 0.40 | 0.28 | 0.98 | 0.46 | 1.81 | 0.22 | 1.53 | 0.65 | 1.81 | |||||||||||||
1979 | 1.02 | 1.40 | 0.58 | 0.56 | 0.50 | 0.16 | 0.96 | 0.36 | 1.19 | 1.02 | 0.39 | 1.93 | 1.93 | |||||||||||||
1980 | 0.91 | 0.62 | 0.48 | 1.10 | 0.58 | 0.63 | 0.31 | 0.76 | 0.61 | 0.28 | 1.50 | 0.96 | 1.50 | |||||||||||||
1981 | 0.62 | 1.35 | 1.08 | 0.46 | 0.39 | 0.87 | 0.42 | 0.44 | 0.51 | 1.80 | 1.25 | 0.92 | 1.80 | |||||||||||||
1982 | 1.13 | 1.45 | 0.50 | 0.58 | 0.26 | 0.52 | 0.94 | 0.23 | 0.49 | 1.46 | 0.87 | 0.97 | 1.46 | |||||||||||||
1983 | 1.83 | 0.66 | 0.79 | 0.45 | 0.45 | 0.82 | 0.71 | 1.95 | 0.61 | 0.70 | 1.85 | 1.13 | 1.95 | |||||||||||||
1984 | 1.90 | 1.12 | 0.94 | 0.44 | 0.93 | 1.84 | 0.01 | 0.21 | 0.43 | 0.42 | 1.14 | 1.04 | 1.90 | |||||||||||||
1985 | 0.32 | 0.43 | 0.65 | 0.42 | 0.24 | 1.35 | 0.03 | 0.45 | 0.35 | 1.31 | 0.75 | 0.90 | 1.35 | |||||||||||||
1986 | 1.60 | 1.00 | 0.90 | 0.42 | 0.58 | 0.36 | 0.51 | 0.28 | 0.60 | 0.92 | 3.52 | 0.76 | 3.52 | |||||||||||||
1987 | 0.65 | 2.20 | 0.92 | 0.57 | 1.05 | 0.27 | 0.25 | 0.33 | 0.64 | 0.25 | 0.72 | 1.60 | 2.20 | |||||||||||||
1988 | 1.11 | 0.25 | 0.91 | 0.82 | 0.77 | 0.77 | 0.54 | 0.30 | 0.59 | 0.90 | 1.20 | 1.17 | 1.20 | |||||||||||||
1989 | 0.51 | 0.95 | 0.80 | 0.67 | 1.05 | 0.55 | 0.23 | 0.55 | 0.10 | 0.48 | 1.77 | 1.20 | 1.77 | |||||||||||||
1990 | 2.40 | 1.23 | 0.66 | 0.68 | 1.01 | 0.79 | 0.49 | 0.41 | 0.04 | 0.79 | 1.67 | 0.76 | 2.40 | |||||||||||||
1991 | 1.14 | 1.40 | 0.74 | 2.60 | 0.80 | 0.40 | 0.23 | 0.45 | 0.55 | 0.72 | 0.95 | 0.55 | 2.60 | |||||||||||||
1992 | 1.48 | 0.71 | 0.83 | 1.18 | 0.13 | 1.09 | 0.87 | 0.89 | 1.08 | 0.42 | 0.95 | 0.69 | 1.48 | |||||||||||||
1993 | 1.02 | 0.16 | 1.87 | 0.61 | 0.92 | 0.75 | 0.35 | 0.14 | 0.00 | 0.51 | 0.32 | 0.70 | 1.87 | |||||||||||||
1994 | 0.55 | 0.71 | a | 1.27 | 0.45 | 0.58 | 0.53 | 0.82 | 0.26 | 1.24 | 1.75 | 1.00 | 2.00 | 2.00 | a | |||||||||||
1995 | 1.17 | 1.70 | 0.87 | 0.63 | 0.58 | 0.35 | 1.30 | ----- | z | 0.72 | 1.50 | 1.69 | 1.05 | ----- | z | |||||||||||
1996 | 1.24 | 2.72 | 0.40 | 1.24 | 1.19 | 0.52 | 0.49 | 0.11 | 0.79 | 0.94 | 1.50 | 1.82 | 2.72 | |||||||||||||
1997 | 1.13 | 0.75 | 1.34 | 1.10 | 1.11 | 1.24 | 0.64 | 0.90 | 0.54 | 1.65 | b | 0.65 | 1.10 | 1.65 | b | |||||||||||
1998 | 1.04 | a | 0.70 | 0.65 | 0.27 | 0.78 | 0.33 | 0.10 | 0.03 | 0.24 | 0.91 | 2.71 | 1.80 | 2.71 | a | |||||||||||
1999 | 1.10 | 0.96 | 0.82 | 0.20 | 0.45 | 0.99 | 0.45 | 0.28 | b | 0.23 | 0.62 | 1.95 | 1.10 | 1.95 | b | |||||||||||
2000 | 0.52 | 0.93 | 0.86 | 1.10 | 0.66 | 0.88 | 0.60 | 0.27 | 0.26 | 0.99 | 0.85 | 0.85 | 1.10 | |||||||||||||
2001 | 0.52 | 0.80 | 0.42 | 1.22 | 0.72 | 0.97 | 0.44 | b | 0.91 | 0.35 | 0.63 | b | 2.35 | 0.87 | 2.35 | d | ||||||||||
2002 | 1.30 | 1.02 | 1.53 | 1.42 | 0.54 | 0.89 | 0.71 | 0.22 | 0.12 | 0.32 | 0.40 | a | 1.01 | b | 1.53 | c | ||||||||||
2003 | 1.17 | 0.46 | 1.06 | 0.42 | 0.41 | 0.30 | 0.12 | 0.22 | 0.30 | 3.07 | 1.20 | 1.30 | 3.07 | |||||||||||||
2004 | 1.33 | 0.50 | 0.36 | 0.36 | a | 0.73 | 0.42 | 0.06 | 1.00 | 0.99 | 1.06 | 0.86 | 0.61 | 1.33 | a | |||||||||||
2005 | 2.37 | b | 0.29 | 2.15 | 1.21 | 0.88 | a | 0.87 | 0.57 | 0.08 | 0.99 | 1.20 | a | 1.05 | 1.31 | 2.37 | d | |||||||||
2006 | 1.75 | 0.60 | 0.38 | a | 1.01 | a | 0.49 | 0.90 | 0.23 | 0.03 | a | 0.24 | a | 0.72 | b | 3.59 | 1.45 | 3.59 | f | |||||||
2007 | 1.53 | 1.22 | 1.35 | b | 0.42 | 0.45 | 0.71 | 0.52 | 0.54 | 0.60 | 1.07 | a | 0.58 | 2.09 | 2.09 | c | ||||||||||
2008 | 0.78 | 0.86 | 0.78 | 0.27 | 0.40 | 0.38 | 0.32 | 0.42 | 0.29 | 0.44 | 2.03 | 0.90 | 2.03 | |||||||||||||
2009 | 2.50 | a | 0.36 | 0.65 | 0.75 | 0.77 | a | 0.71 | 0.02 | 0.58 | 0.94 | 1.20 | 1.42 | 0.59 | 2.50 | b | ||||||||||
2010 | 0.94 | 0.52 | 0.96 | b | 0.55 | 0.76 | 0.72 | 0.32 | 0.15 | 1.18 | 0.89 | 1.26 | 0.93 | 1.26 | b | |||||||||||
2011 | 1.06 | 0.98 | 0.73 | 1.18 | 1.94 | 1.11 | 0.27 | 0.25 | 0.50 | 0.76 | 1.63 | a | 0.87 | 1.94 | a | |||||||||||
2012 | 0.94 | 0.70 | 0.97 | 1.02 | 0.86 | 0.50 | 0.62 | 0.00 | 0.04 | 1.30 | 1.47 | 0.86 | a | 1.47 | a | |||||||||||
2013 | ----- | z | 2.28 | m | 0.74 | k | 0.78 | j | 1.29 | a | 0.70 | j | 0.00 | o | ----- | z | 2.72 | q | 3.00 | i | 1.88 | p | 0.80 | g | ----- | z |
2014 | 1.17 | g | 2.72 | g | 2.05 | e | 0.82 | g | 1.03 | e | 0.46 | e | 0.86 | e | 1.19 | e | 1.14 | g | 1.25 | h | 1.07 | h | 1.10 | e | ----- | z |
2015 | 1.64 | g | 1.16 | e | 2.06 | i | 0.61 | f | 0.25 | k | 0.27 | f | 0.26 | e | 1.87 | e | 0.35 | e | 0.80 | d | 3.47 | h | 2.50 | e | ----- | z |
2016 | 1.05 | h | 1.38 | f | 0.81 | d | 0.54 | e | 0.56 | f | 0.69 | d | 0.59 | g | 0.20 | d | 0.80 | e | 2.20 | e | 1.38 | g | 0.95 | e | ----- | z |
2017 | 2.04 | g | 1.65 | f | 1.05 | d | 0.70 | e | 0.75 | e | 0.70 | d | 0.06 | e | 0.12 | d | 0.42 | e | 2.49 | e | 1.70 | h | 1.47 | f | ----- | z |
2018 | 0.82 | f | 0.84 | e | 0.44 | d | 1.83 | e | 0.50 | e | 0.60 | e | 0.70 | d | 0.75 | d | 0.73 | f | 1.50 | d | 1.06 | g | 0.95 | e | ----- | z |
2019 | 0.85 | e | 1.41 | e | 0.32 | e | 0.93 | f | 0.43 | e | 0.44 | e | 0.25 | e | 0.47 | d | 0.79 | g | 1.68 | h | 0.40 | g | 2.00 | e | ----- | z |
2020 | 1.38 | e | 1.08 | e | 1.11 | e | 0.28 | s | 0.97 | g | 1.05 | d | 0.10 | e | 0.53 | e | 1.05 | e | 1.97 | h | 1.54 | f | 1.52 | f | ----- | z |
2021 | 2.40 | g | 1.63 | e | 0.85 | d | 0.80 | d | 0.29 | f | 1.42 | d | 0.00 | f | 0.11 | e | 1.20 | e | 1.51 | e | 1.97 | f | 1.26 | e | ----- | z |
2022 | 1.60 | g | 2.00 | e | 2.02 | d | 0.82 | e | 0.97 | g | 1.53 | e | 0.28 | f | 0.03 | d | 0.06 | e | 0.84 | e | 2.40 | g | 2.25 | e | ----- | z |
2023 | 0.52 | g | 0.69 | e | 0.64 | d | 1.52 | e | 0.71 | e | 0.46 | e | 0.15 | f | 0.12 | d | 0.82 | e | 0.55 | g | 1.42 | g | 2.15 | f | ----- | z |
2024 | 1.42 | f | 1.25 | m | 0.23 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.11 | 0.99 | 0.85 | 0.73 | 0.64 | 0.71 | 0.42 | 0.49 | 0.64 | 1.00 | 1.27 | 1.16 | 1.81 | |||||||||||||
S.D. | 0.49 | 0.47 | 0.41 | 0.40 | 0.30 | 0.38 | 0.34 | 0.47 | 0.40 | 0.51 | 0.67 | 0.48 | 0.52 | |||||||||||||
SKEW | 0.74 | 0.98 | 1.31 | 1.90 | 1.30 | 0.85 | 1.23 | 1.95 | 0.56 | 1.22 | 1.40 | 1.04 | 0.97 | |||||||||||||
MAX | 2.50 | 2.72 | 2.15 | 2.60 | 1.94 | 1.94 | 1.78 | 2.48 | 1.81 | 3.07 | 3.59 | 2.67 | 3.52 | |||||||||||||
MIN | 0.24 | 0.16 | 0.22 | 0.20 | 0.13 | 0.05 | 0.00 | 0.00 | 0.00 | 0.22 | 0.32 | 0.31 | 0.90 | |||||||||||||
YRS | 73 | 78 | 81 | 78 | 78 | 81 | 78 | 80 | 79 | 78 | 72 | 79 | 68 |