YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 0.17 | 0.69 | 0.49 | 1.04 | 0.09 | 1.34 | 0.47 | 0.10 | 0.25 | 0.38 | 1.31 | 0.93 | 7.26 | |||||||||||||
1949 | 0.88 | 0.34 | 0.47 | 0.37 | 0.92 | 1.08 | 0.62 | 0.49 | 0.39 | 2.81 | 0.07 | 0.78 | 9.22 | |||||||||||||
1950 | 0.47 | 0.80 | 1.03 | 1.06 | 1.72 | 0.17 | 0.92 | 0.15 | 2.29 | 0.31 | 1.08 | 0.61 | 10.61 | |||||||||||||
1951 | 0.58 | 0.31 | 0.48 | 0.77 | 0.65 | 0.81 | 0.32 | 0.17 | 0.05 | 0.77 | 0.06 | 0.42 | 5.39 | |||||||||||||
1952 | 0.34 | 0.11 | 0.62 | 0.91 | 0.96 | 1.42 | 0.46 | 0.67 | 0.07 | 0.00 | 0.14 | 0.43 | 6.13 | |||||||||||||
1953 | 0.16 | 0.25 | 0.14 | 0.20 | 1.52 | 0.29 | 0.63 | 0.97 | 0.08 | 0.39 | 0.42 | 0.08 | 5.13 | |||||||||||||
1954 | 0.22 | 0.17 | 1.13 | 0.19 | 0.54 | 0.39 | 0.57 | 0.25 | 0.66 | 0.53 | 0.54 | 0.23 | 5.42 | |||||||||||||
1955 | 0.23 | 0.49 | 0.22 | 0.87 | 0.66 | 0.54 | 0.69 | 0.27 | 0.62 | 0.13 | 0.49 | 0.56 | 5.77 | |||||||||||||
1956 | 0.36 | 0.17 | 0.05 | 0.65 | 1.33 | 0.00 | 0.64 | 0.55 | 0.39 | 1.65 | 0.13 | 0.49 | 6.41 | |||||||||||||
1957 | 0.83 | 0.23 | 0.98 | 1.53 | 3.30 | 1.42 | 0.18 | 0.87 | 0.26 | 1.06 | 1.50 | 0.49 | 12.65 | |||||||||||||
1958 | 0.42 | 0.17 | 0.32 | 0.62 | 0.95 | 1.14 | 0.12 | 0.59 | 0.26 | 0.03 | 0.73 | 0.35 | 5.70 | |||||||||||||
1959 | 0.18 | 1.45 | 0.60 | 0.38 | 0.83 | 1.14 | 0.09 | 0.96 | 2.14 | 0.37 | 0.09 | 0.25 | 8.48 | |||||||||||||
1960 | 0.66 | 1.17 | 0.43 | 0.20 | 0.50 | 0.39 | 0.73 | 0.07 | 0.40 | 0.75 | 1.02 | 0.13 | 6.45 | |||||||||||||
1961 | 0.12 | 0.95 | 0.63 | 0.13 | 1.04 | 0.15 | 0.26 | 0.75 | 1.53 | 1.88 | 0.52 | 0.31 | 8.27 | |||||||||||||
1962 | 1.17 | 1.26 | 0.09 | a | 0.81 | 1.90 | 0.25 | 0.14 | 0.13 | 0.19 | 0.47 | 0.39 | 0.00 | 6.80 | ||||||||||||
1963 | 1.06 | 0.35 | 0.42 | 2.32 | 0.09 | 1.13 | 0.66 | 3.12 | 1.33 | 0.60 | 0.24 | 0.42 | 11.74 | |||||||||||||
1964 | 0.58 | 0.99 | 1.17 | 1.51 | 1.24 | 1.25 | 0.45 | 0.35 | 0.13 | 0.04 | 0.70 | 1.02 | 9.43 | |||||||||||||
1965 | 0.12 | 0.40 | 0.65 | 1.55 | 2.01 | 2.96 | 1.17 | 0.49 | 3.67 | 0.26 | 0.48 | 0.78 | 14.54 | |||||||||||||
1966 | 0.19 | 0.72 | 0.45 | 0.85 | 0.40 | 0.61 | 0.68 | 0.74 | 0.77 | 1.13 | 0.48 | 0.22 | 7.24 | |||||||||||||
1967 | 0.41 | 0.51 | 0.96 | 0.83 | 1.62 | 2.39 | 0.23 | 0.16 | 0.66 | 0.81 | 0.56 | 1.24 | 10.38 | |||||||||||||
1968 | 0.35 | 0.57 | 0.80 | 2.45 | 0.68 | 1.18 | 0.23 | 2.83 | 0.26 | 0.35 | 0.62 | 0.70 | 11.02 | |||||||||||||
1969 | 1.01 | 1.13 | 0.52 | 1.05 | 0.00 | 3.49 | 0.52 | 0.36 | 0.46 | 1.55 | 0.32 | 0.57 | 10.98 | |||||||||||||
1970 | 0.33 | 0.04 | 0.86 | 1.22 | 0.85 | 2.70 | 0.84 | 0.11 | 0.32 | 1.30 | 0.63 | 0.51 | 9.71 | |||||||||||||
1971 | 0.38 | 0.37 | 0.63 | 2.40 | 3.56 | 0.10 | 0.52 | 0.10 | 1.45 | 2.05 | 0.81 | 0.52 | 12.89 | |||||||||||||
1972 | 0.58 | 0.36 | 0.28 | 0.90 | 1.72 | 1.16 | 0.82 | 0.45 | 0.78 | 1.66 | 0.46 | 1.59 | 10.76 | |||||||||||||
1973 | 0.66 | 0.50 | 0.56 | 1.99 | 0.31 | 0.21 | 3.67 | 0.53 | 3.58 | 0.54 | 1.05 | 0.81 | 14.41 | |||||||||||||
1974 | 0.42 | 0.54 | 0.33 | 0.98 | 0.00 | 0.10 | 1.52 | 0.12 | 0.02 | 0.39 | 0.00 | 0.12 | 4.54 | |||||||||||||
1975 | 0.28 | 0.24 | 0.81 | 0.50 | 1.61 | 0.72 | 0.81 | 0.08 | 0.09 | 1.03 | 1.02 | 1.78 | 8.97 | |||||||||||||
1976 | 0.18 | 0.70 | 0.22 | 0.61 | 0.51 | 1.52 | 2.34 | 0.93 | 0.53 | 0.24 | 0.00 | 0.13 | 7.91 | |||||||||||||
1977 | 0.27 | 0.02 | 1.97 | 0.57 | 0.48 | 0.03 | 0.82 | 1.24 | 0.13 | 0.46 | 0.72 | 0.42 | 7.13 | |||||||||||||
1978 | 1.54 | 1.23 | 0.98 | 2.03 | 2.48 | 0.74 | 0.18 | 0.75 | 1.35 | 0.08 | 1.59 | 0.45 | a | 13.40 | ||||||||||||
1979 | 1.39 | 0.32 | 0.51 | 0.64 | 0.36 | 0.26 | 0.25 | 1.63 | 0.27 | 0.56 | 0.67 | 0.38 | 7.24 | |||||||||||||
1980 | 1.31 | 0.05 | 0.59 | 0.41 | 2.92 | 0.06 | 0.41 | 0.48 | 0.07 | 1.74 | 0.46 | 0.47 | 8.97 | |||||||||||||
1981 | 0.43 | 0.18 | 0.65 | 0.66 | 3.54 | 0.13 | 1.19 | 0.71 | 0.57 | 1.38 | 0.59 | 1.00 | 11.03 | |||||||||||||
1982 | 0.52 | 1.14 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.66 | j | ||
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.60 | n | ----- | z | 1.60 | 1.52 | 3.12 | j | ||
1984 | 0.55 | 0.21 | 0.98 | 0.88 | 0.17 | 0.99 | 0.88 | 0.63 | 1.17 | 0.30 | 0.45 | 0.20 | 7.41 | |||||||||||||
1985 | 0.76 | 0.66 | 0.72 | 0.14 | 0.38 | 0.77 | 0.71 | 0.04 | 0.55 | 0.50 | 0.79 | 1.37 | 7.39 | |||||||||||||
1986 | 0.04 | 0.70 | 0.63 | 2.26 | 0.21 | 0.37 | 1.28 | ----- | z | 1.08 | 1.01 | 0.27 | 0.28 | 8.13 | a | |||||||||||
1987 | 0.33 | 0.39 | 0.67 | 0.04 | 2.22 | 0.40 | 1.64 | 0.76 | 0.56 | 0.26 | 0.79 | 0.56 | 8.62 | |||||||||||||
1988 | 0.26 | 0.08 | 0.92 | 0.75 | 0.36 | 0.76 | 0.13 | 0.27 | 0.33 | 0.00 | 0.39 | 0.28 | 4.53 | |||||||||||||
1989 | 0.19 | 1.01 | 0.62 | 0.05 | 0.94 | 1.03 | 1.29 | 0.14 | 0.98 | 0.34 | 0.13 | 0.22 | 6.94 | |||||||||||||
1990 | 0.18 | 0.42 | 1.03 | 0.69 | 0.76 | 0.91 | 1.32 | 0.53 | 0.35 | 0.40 | 0.41 | 0.28 | 7.28 | |||||||||||||
1991 | 0.35 | 0.18 | 0.33 | 1.92 | 2.81 | 0.84 | 1.51 | 0.78 | 0.82 | 0.85 | 1.45 | 0.24 | 12.08 | |||||||||||||
1992 | 0.87 | 0.08 | 1.10 | 0.16 | 1.55 | 0.38 | 0.58 | 0.22 | 0.49 | 0.82 | 1.31 | 0.92 | 8.48 | |||||||||||||
1993 | 1.16 | 0.61 | 1.30 | 2.30 | 1.23 | 1.76 | 0.57 | 0.58 | 0.26 | 1.32 | 0.39 | 0.37 | 11.85 | |||||||||||||
1994 | 0.94 | 1.03 | 1.06 | 0.87 | 0.30 | 0.36 | 0.16 | 0.16 | 0.58 | 2.34 | 1.18 | 0.29 | 9.27 | |||||||||||||
1995 | 0.64 | 1.13 | 0.69 | 1.48 | 3.67 | 1.26 | 0.32 | 0.34 | 0.70 | 0.85 | 0.42 | 0.34 | 11.84 | |||||||||||||
1996 | 1.37 | 0.31 | 0.60 | a | 0.34 | 1.98 | 0.59 | 0.50 | 0.86 | 0.81 | 1.82 | 0.86 | 1.06 | 11.10 | ||||||||||||
1997 | 1.06 | 0.30 | 0.32 | 0.94 | 0.45 | 1.04 | 0.40 | 1.66 | 1.72 | 1.08 | 0.11 | 0.92 | 10.00 | |||||||||||||
1998 | 0.65 | 0.73 | 1.59 | 1.08 | 0.91 | 1.44 | 0.37 | 0.17 | 1.07 | 1.71 | 0.13 | 0.16 | 10.01 | |||||||||||||
1999 | 0.46 | 0.71 | 0.59 | 2.74 | 2.49 | 0.36 | 0.62 | 0.54 | 0.68 | 0.05 | 0.01 | 0.24 | 9.49 | |||||||||||||
2000 | 0.24 | 0.91 | 0.71 | 0.42 | 0.76 | 0.59 | 0.04 | 0.61 | 1.91 | 0.79 | 0.18 | 0.31 | 7.47 | |||||||||||||
2001 | 0.18 | 0.79 | 0.27 | 1.15 | 0.56 | 0.40 | 0.45 | 0.76 | 0.24 | 0.23 | 0.43 | 0.10 | 5.56 | |||||||||||||
2002 | 0.06 | 0.01 | 0.86 | 0.68 | 0.21 | 0.08 | 0.55 | 0.18 | 0.91 | 0.67 | 0.44 | 0.32 | 4.97 | |||||||||||||
2003 | 0.06 | 0.09 | 0.29 | 0.27 | 0.90 | 2.20 | 0.01 | 0.55 | 0.71 | 0.29 | 0.18 | 0.71 | 6.26 | |||||||||||||
2004 | 0.02 | 0.55 | 0.07 | 0.97 | 0.50 | 1.28 | 0.35 | 0.92 | 1.55 | 2.38 | 0.48 | 0.07 | 9.14 | |||||||||||||
2005 | 0.84 | 0.15 | 0.43 | 1.22 | 1.86 | 0.70 | 0.11 | 1.07 | 1.07 | 1.05 | 0.23 | 0.13 | 8.86 | |||||||||||||
2006 | 0.38 | 0.22 | 0.44 | 0.43 | 0.88 | 0.61 | 0.06 | 0.77 | 0.55 | 1.49 | 0.29 | 0.24 | 6.36 | |||||||||||||
2007 | 0.24 | 0.29 | 0.41 | 0.26 | 1.05 | 0.23 | 0.82 | 1.73 | 0.91 | 0.71 | 0.03 | 0.44 | 7.12 | |||||||||||||
2008 | 0.16 | 0.60 | 0.43 | 0.19 | 1.43 | 0.69 | 0.00 | 0.26 | 1.32 | 0.75 | 0.19 | 0.01 | 6.03 | |||||||||||||
2009 | 0.32 | 0.14 | 0.59 | 1.66 | 1.01 | 1.20 | 0.54 | 0.83 | 0.51 | 0.91 | 0.20 | 0.15 | 8.06 | |||||||||||||
2010 | 0.04 | 0.07 | 0.49 | 1.29 | 1.18 | 1.11 | 0.68 | 0.37 | 0.13 | 0.50 | 0.21 | 1.07 | 7.14 | |||||||||||||
2011 | 0.03 | 0.27 | 0.42 | 1.30 | 2.44 | 0.81 | 0.66 | 0.39 | 0.17 | 0.64 | 1.46 | 0.11 | 8.70 | |||||||||||||
2012 | 0.21 | 0.35 | 0.08 | 0.54 | 0.21 | 0.00 | 1.29 | 0.01 | 0.01 | 0.07 | 0.17 | 0.20 | 3.14 | |||||||||||||
2013 | 0.05 | 0.32 | 0.19 | 0.37 | 0.56 | 0.00 | 0.21 | 0.50 | 1.37 | 0.86 | 0.03 | a | 0.18 | 4.64 | ||||||||||||
2014 | 0.07 | 0.08 | 0.43 | 0.24 | 0.49 | 0.29 | 0.36 | 0.52 | 1.20 | 0.32 | 0.13 | 0.11 | 4.24 | |||||||||||||
2015 | 0.01 | 0.08 | 0.22 | 0.67 | 3.10 | 1.11 | 2.12 | 0.37 | 0.58 | 0.15 | 0.17 | 0.04 | 8.62 | |||||||||||||
2016 | 0.03 | 0.19 | 0.56 | 1.48 | 2.20 | 0.21 | 0.30 | 0.20 | 1.59 | 0.46 | 0.14 | 0.08 | 7.44 | |||||||||||||
2017 | 0.49 | 0.41 | 1.43 | 0.55 | 0.64 | 0.02 | 0.14 | 0.70 | 0.77 | 0.02 | 0.29 | 0.11 | 5.57 | |||||||||||||
2018 | 0.08 | 0.11 | 0.34 | 0.16 | 1.59 | 0.16 | 0.16 | 0.25 | 0.00 | 1.05 | 0.25 | 0.12 | 4.27 | |||||||||||||
2019 | 0.24 | 0.14 | 0.21 | 1.00 | 0.79 | 0.21 | 0.02 | 0.49 | 0.60 | 0.12 | 0.31 | 0.14 | 4.27 | |||||||||||||
2020 | 0.01 | 0.03 | 0.25 | 0.63 | 0.25 | 0.90 | 0.23 | 0.09 | 0.42 | a | 0.07 | 0.22 | 0.01 | e | 3.11 | |||||||||||
2021 | 0.05 | 0.25 | 0.39 | 0.07 | 0.36 | 0.17 | 0.07 | 1.67 | 0.37 | 0.36 | 0.11 | 0.24 | 4.11 | |||||||||||||
2022 | 0.00 | 0.01 | 0.20 | 0.39 | 0.64 | a | 0.67 | 0.29 | 0.93 | 0.62 | 0.10 | 0.11 | 0.17 | 4.13 | ||||||||||||
2023 | 0.02 | 0.21 | 0.28 | 0.16 | b | 0.58 | 0.79 | 0.45 | 0.92 | 0.74 | 0.53 | 0.56 | 0.02 | 5.26 | ||||||||||||
2024 | 0.11 | 0.36 | b | 1.16 | 0.11 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.63 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.43 | 0.45 | 0.60 | 0.89 | 1.16 | 0.80 | 0.63 | 0.62 | 0.76 | 0.76 | 0.50 | 0.45 | 7.98 | |||||||||||||
S.D. | 0.38 | 0.36 | 0.37 | 0.66 | 0.94 | 0.70 | 0.60 | 0.56 | 0.71 | 0.64 | 0.42 | 0.40 | 2.74 | |||||||||||||
SKEW | 1.11 | 0.91 | 1.09 | 0.97 | 1.09 | 1.54 | 2.42 | 2.27 | 2.02 | 1.11 | 1.10 | 1.41 | 0.38 | |||||||||||||
MAX | 1.54 | 1.45 | 1.97 | 2.74 | 3.67 | 3.49 | 3.67 | 3.12 | 3.67 | 2.81 | 1.60 | 1.78 | 14.54 | |||||||||||||
MIN | 0.00 | 0.01 | 0.05 | 0.04 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 3.11 | |||||||||||||
YRS | 76 | 76 | 75 | 74 | 74 | 74 | 74 | 73 | 74 | 74 | 75 | 75 | 73 |