YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.26 | 0.50 | 0.08 | 1.01 | a | 0.32 | a | ----- | z | |||
1949 | 0.35 | 0.36 | 0.19 | 0.40 | f | 0.31 | 0.39 | 0.27 | 0.39 | 0.55 | 0.52 | 0.44 | 0.38 | 0.55 | f | |||||||||||
1950 | 0.60 | 0.23 | 0.50 | b | 0.50 | i | 0.54 | a | 0.80 | a | 0.34 | 0.64 | 0.50 | h | 0.40 | 0.21 | 0.38 | 0.80 | u | |||||||
1951 | 0.38 | 0.15 | 1.32 | 0.34 | 1.02 | 0.68 | 0.81 | 0.53 | a | 0.22 | 0.65 | 0.19 | a | 0.32 | 1.32 | b | ||||||||||
1952 | 0.31 | 0.38 | 0.40 | 0.23 | 0.51 | 0.66 | 1.15 | 1.07 | 0.09 | 0.00 | 0.14 | 0.32 | 1.15 | |||||||||||||
1953 | 0.21 | a | 0.39 | 0.32 | 0.80 | 0.74 | 0.39 | 0.47 | 0.27 | 0.41 | 0.15 | 0.29 | 0.26 | 0.80 | a | |||||||||||
1954 | 0.26 | 0.26 | 0.54 | 0.44 | 0.46 | 0.90 | 0.38 | 0.32 | 0.58 | 0.42 | 0.27 | 0.26 | 0.90 | |||||||||||||
1955 | 0.33 | 0.18 | 0.35 | 0.28 | 0.46 | 0.45 | 0.23 | 0.24 | 0.46 | 0.39 | b | 0.34 | 1.36 | 1.36 | b | |||||||||||
1956 | 0.41 | 0.18 | 0.17 | 0.58 | c | 0.39 | 0.32 | 0.41 | 0.58 | 0.42 | 0.17 | 0.00 | e | 0.84 | a | 0.84 | i | |||||||||
1957 | 0.59 | 0.27 | 0.28 | 0.44 | 0.30 | 0.53 | 0.39 | 0.27 | 0.64 | 0.26 | 0.27 | 0.12 | l | 0.64 | l | |||||||||||
1958 | 0.21 | f | 0.11 | 0.34 | h | 0.58 | 0.46 | 0.29 | 0.32 | 0.56 | 0.20 | 0.28 | 0.69 | 0.25 | m | ----- | z | |||||||||
1959 | 0.41 | t | 0.42 | 0.27 | 0.37 | a | 0.69 | a | 0.63 | 0.42 | 0.30 | 0.60 | 0.71 | 0.19 | 0.14 | 0.71 | v | |||||||||
1960 | 0.13 | 0.40 | 0.17 | 0.68 | 1.07 | 1.04 | 0.23 | 0.72 | 0.18 | 0.62 | 0.31 | 0.26 | 1.07 | |||||||||||||
1961 | 0.11 | 0.50 | 0.30 | 0.45 | 0.65 | a | 0.22 | 0.46 | 1.01 | 0.68 | 0.63 | 0.25 | 0.36 | 1.01 | a | |||||||||||
1962 | 0.67 | 0.74 | 0.62 | 0.36 | 1.05 | 0.57 | 0.38 | 0.59 | 0.46 | 0.19 | 0.43 | 0.21 | 1.05 | |||||||||||||
1963 | 0.33 | 0.69 | 0.65 | 0.32 | 0.65 | 0.77 | 0.23 | 0.12 | 0.72 | 0.23 | 0.22 | 0.05 | y | 0.77 | y | |||||||||||
1964 | 0.30 | 0.20 | 0.20 | 0.30 | b | 0.58 | 0.45 | 0.63 | 0.47 | 0.29 | 1.08 | 0.51 | a | 0.66 | a | 1.08 | d | |||||||||
1965 | 0.70 | 0.16 | 0.16 | 0.67 | 0.37 | 2.23 | 0.60 | 0.43 | 0.51 | a | 0.23 | 0.18 | 0.32 | 2.23 | a | |||||||||||
1966 | 0.20 | 0.16 | 0.67 | l | 0.51 | 0.59 | 0.49 | 0.34 | 0.63 | 1.54 | a | 0.38 | 0.57 | g | 0.54 | b | 1.54 | v | ||||||||
1967 | 0.73 | f | 0.23 | c | 0.14 | q | 0.40 | 1.24 | 0.54 | 0.44 | 0.17 | 0.25 | 0.62 | p | 0.36 | j | 0.58 | ----- | z | |||||||
1968 | 0.60 | 0.27 | 0.20 | 0.38 | 0.13 | s | 0.93 | 0.49 | 0.94 | 0.52 | 0.35 | 0.62 | 0.23 | 0.94 | s | |||||||||||
1969 | 0.44 | 0.10 | 0.09 | 0.92 | 0.47 | 0.72 | 0.30 | 0.06 | 0.40 | 0.59 | 0.35 | 0.35 | 0.92 | |||||||||||||
1970 | 0.30 | 0.13 | g | 0.70 | f | 0.32 | b | 0.57 | 1.47 | 0.45 | 0.32 | 0.69 | 0.34 | 0.00 | v | 0.39 | ----- | z | ||||||||
1971 | 0.44 | 0.36 | 0.18 | ----- | z | 0.58 | 0.44 | 0.72 | 0.36 | 1.19 | 0.50 | 0.39 | 0.22 | t | ----- | z | ||||||||||
1972 | 0.20 | 0.19 | 0.43 | 0.60 | 0.29 | 0.58 | 0.75 | 0.28 | 0.80 | 0.50 | 0.20 | 0.96 | 0.96 | |||||||||||||
1973 | 0.23 | 0.14 | 0.10 | 0.13 | 0.53 | 0.55 | 0.70 | 0.87 | 0.60 | 0.40 | 0.38 | 0.03 | 0.87 | |||||||||||||
1974 | 0.23 | 0.12 | 0.78 | 0.21 | 0.16 | 0.46 | 0.43 | 0.36 | 0.14 | 0.60 | 0.18 | 0.28 | n | 0.78 | n | |||||||||||
1975 | 0.85 | g | 0.32 | 0.32 | g | 0.43 | j | 0.46 | 0.30 | 0.70 | 0.30 | 0.56 | 0.75 | a | 0.57 | a | 0.19 | w | ----- | z | ||||||
1976 | 1.10 | 0.39 | 0.47 | 0.30 | 0.51 | 1.10 | 0.52 | 0.35 | 1.00 | 0.33 | 0.33 | 0.23 | x | 1.10 | x | |||||||||||
1977 | 0.24 | 0.15 | 0.19 | 0.19 | 0.36 | 0.30 | 0.90 | 1.13 | 0.61 | 0.19 | 0.24 | c | 0.43 | 1.13 | c | |||||||||||
1978 | 0.97 | 0.44 | 0.48 | 0.30 | 0.50 | 0.68 | 0.39 | 0.48 | 0.20 | 0.23 | 0.35 | 0.30 | 0.97 | |||||||||||||
1979 | 0.28 | f | 0.15 | a | 0.78 | a | 0.08 | 0.26 | 1.35 | 0.41 | 0.99 | 0.20 | 0.38 | 0.34 | 0.07 | a | 1.35 | i | ||||||||
1980 | 0.73 | c | 0.37 | 0.26 | m | 0.20 | 0.54 | 0.54 | a | 0.54 | 0.42 | ----- | z | 0.25 | 0.60 | a | 0.75 | ----- | z | |||||||
1981 | 0.16 | 0.52 | 0.42 | a | ----- | z | ----- | z | ----- | z | ----- | z | 0.15 | ----- | z | ----- | z | ----- | z | 0.36 | c | ----- | z | |||
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.48 | 0.51 | ----- | z | ----- | z | ----- | z | 0.25 | a | 0.25 | a | ----- | z | ||
1983 | ----- | z | 0.18 | b | 0.16 | 0.29 | c | ----- | z | 0.15 | 0.75 | 0.39 | 0.84 | a | 0.57 | 0.55 | 0.32 | e | ----- | z | ||||||
1984 | 0.10 | a | 0.15 | c | 0.32 | b | 0.49 | h | 0.62 | c | ----- | z | 0.76 | 0.48 | b | 0.89 | 0.25 | 0.52 | 0.21 | b | ----- | z | ||||
1985 | 0.15 | a | 0.27 | b | 0.50 | a | 0.20 | 0.50 | 0.30 | 0.59 | 0.23 | 0.56 | b | 0.42 | c | 0.60 | b | 0.17 | 0.60 | k | ||||||
1986 | 0.16 | 0.39 | c | 0.95 | a | 0.48 | b | 0.16 | 0.56 | ----- | z | 1.00 | 0.65 | 0.26 | 0.75 | b | 0.06 | ----- | z | |||||||
1987 | 0.21 | 0.16 | 0.84 | 0.16 | a | 0.51 | 0.55 | 0.90 | 0.51 | 0.09 | 0.00 | 0.30 | 0.28 | c | 0.90 | d | ||||||||||
1988 | 0.19 | a | 0.26 | 0.31 | a | 0.50 | 0.79 | 0.26 | 0.36 | 0.12 | 0.12 | f | 0.10 | a | 0.42 | a | 0.14 | a | 0.79 | k | ||||||
1989 | 0.60 | 0.30 | 0.47 | b | 0.34 | 0.58 | 0.58 | 0.34 | a | 0.28 | 0.18 | 0.42 | 0.19 | 0.73 | 0.73 | c | ||||||||||
1990 | 0.36 | 0.07 | 0.27 | c | 0.49 | 0.50 | 0.39 | a | 0.49 | 1.03 | 0.38 | 0.75 | 0.15 | 0.25 | a | 1.03 | e | |||||||||
1991 | 0.10 | 0.26 | 0.34 | a | 0.57 | 1.05 | 0.25 | 0.27 | 0.48 | 0.75 | 0.67 | 0.33 | 0.40 | 1.05 | a | |||||||||||
1992 | 0.03 | 0.15 | 0.35 | 0.47 | 1.13 | 1.67 | 0.47 | 0.58 | 0.50 | 0.95 | 0.37 | 0.50 | b | 1.67 | b | |||||||||||
1993 | 0.28 | 0.25 | 0.45 | a | 0.41 | 0.45 | 1.20 | 0.88 | 0.25 | 0.10 | a | 0.44 | 0.69 | 0.20 | 1.20 | b | ||||||||||
1994 | 0.13 | 0.34 | 0.90 | 0.44 | 0.40 | 0.75 | 0.64 | 0.14 | 0.44 | 0.45 | 0.37 | b | 0.75 | 0.90 | b | |||||||||||
1995 | 0.19 | a | 0.17 | 0.30 | f | 0.73 | 0.35 | 0.29 | a | 0.40 | 0.29 | 0.56 | 0.48 | 0.31 | 0.36 | 0.73 | h | |||||||||
1996 | 0.45 | 0.17 | 0.47 | 0.32 | 0.59 | 0.48 | 0.28 | 0.40 | 0.28 | 0.23 | 0.68 | 0.38 | 0.68 | |||||||||||||
1997 | 0.78 | 0.24 | 0.35 | 0.38 | 0.26 | 0.38 | 1.04 | 0.51 | 0.49 | b | 0.42 | 0.19 | 0.41 | 1.04 | b | |||||||||||
1998 | 0.59 | 0.10 | 0.19 | a | 0.12 | 0.22 | 0.95 | 0.30 | 0.42 | 0.58 | ----- | z | 0.62 | 0.27 | a | ----- | z | |||||||||
1999 | 0.68 | b | 0.24 | a | 0.16 | 0.37 | 0.48 | 0.45 | 0.42 | 0.61 | 0.35 | 0.54 | 0.10 | 0.56 | 0.68 | c | ||||||||||
2000 | 0.54 | 0.35 | 0.66 | 0.22 | b | 0.40 | a | 0.50 | 0.14 | 0.79 | 1.60 | 0.34 | b | 0.11 | a | 0.18 | a | 1.60 | g | |||||||
2001 | 0.17 | 0.18 | 0.07 | 0.48 | a | 0.50 | 0.56 | 0.60 | 0.10 | 0.19 | 0.35 | 0.30 | 0.15 | 0.60 | a | |||||||||||
2002 | 0.18 | 0.18 | 0.23 | 0.46 | 0.43 | a | 0.50 | 0.56 | 0.63 | 0.49 | 0.40 | 0.45 | 0.18 | 0.63 | a | |||||||||||
2003 | 0.23 | 0.17 | 0.72 | 0.43 | 0.44 | a | 0.52 | 0.39 | 0.12 | 0.14 | 0.63 | a | 0.18 | 0.38 | 0.72 | b | ||||||||||
2004 | 0.48 | a | 0.27 | 0.16 | 0.20 | 0.56 | 0.46 | 0.66 | 0.43 | 0.55 | 0.60 | b | 0.27 | 0.12 | 0.66 | c | ||||||||||
2005 | 0.50 | 0.08 | 0.20 | 0.11 | 0.35 | 0.53 | 0.70 | 0.67 | 0.32 | 0.61 | 0.42 | ----- | z | ----- | z | |||||||||||
2006 | 0.32 | 0.22 | 0.25 | 0.50 | a | 0.34 | 0.42 | a | 0.50 | b | 0.19 | 0.22 | 1.10 | a | 0.55 | 0.27 | 1.10 | e | ||||||||
2007 | 0.11 | 0.23 | 0.39 | 0.30 | 0.39 | a | 0.86 | 0.68 | 0.45 | 0.43 | a | 1.04 | 0.51 | 0.40 | 1.04 | b | ||||||||||
2008 | 0.43 | 0.10 | 0.39 | b | 0.11 | 0.56 | a | 0.17 | 0.24 | 0.19 | 0.02 | 0.22 | a | 0.50 | 0.30 | 0.56 | d | |||||||||
2009 | 0.17 | 0.42 | 0.50 | 0.28 | 0.29 | 0.41 | 0.60 | b | 0.96 | 0.04 | 0.55 | 0.30 | ----- | z | ----- | z | ||||||||||
2010 | 0.25 | 0.15 | 0.44 | 0.63 | 0.44 | 0.48 | 0.22 | 0.54 | 0.10 | 0.60 | 0.66 | 0.35 | 0.66 | |||||||||||||
2011 | 0.15 | 0.39 | 0.61 | 0.38 | a | 0.78 | 0.90 | 0.26 | 1.50 | 0.09 | 0.28 | 0.69 | 0.59 | 1.50 | a | |||||||||||
2012 | 0.24 | 0.11 | 0.17 | 0.50 | 0.68 | 0.65 | 0.84 | 0.36 | 0.41 | 0.35 | 0.20 | 0.38 | 0.84 | |||||||||||||
2013 | 0.17 | 0.11 | 0.18 | 0.38 | 0.47 | 0.20 | 0.66 | 0.24 | 0.83 | 0.57 | 0.36 | 0.48 | 0.83 | |||||||||||||
2014 | 0.25 | 0.22 | 0.49 | 0.49 | 0.30 | 1.13 | 0.31 | 1.10 | 0.62 | a | 0.31 | 0.74 | 0.57 | 1.13 | a | |||||||||||
2015 | 0.23 | 0.11 | 0.13 | 0.24 | 0.93 | 0.43 | 0.35 | 0.78 | 0.46 | 0.59 | 1.33 | 0.31 | 1.33 | |||||||||||||
2016 | 0.40 | 0.12 | 0.16 | 0.25 | 0.30 | 0.28 | 0.48 | 0.21 | 0.53 | 1.26 | a | 0.46 | 0.76 | 1.26 | a | |||||||||||
2017 | 0.26 | 0.49 | 0.38 | d | 0.50 | 0.55 | 0.31 | 0.36 | 0.21 | 1.33 | 0.12 | 0.66 | 0.25 | 1.33 | d | |||||||||||
2018 | 0.33 | 0.52 | 0.49 | 0.38 | 0.60 | 0.88 | b | 0.06 | 0.34 | 0.12 | 0.26 | 0.30 | 0.19 | 0.88 | b | |||||||||||
2019 | 0.35 | 0.95 | 0.23 | 0.23 | 0.50 | 0.55 | 0.60 | 0.33 | 0.61 | 0.40 | 0.42 | 0.16 | 0.95 | |||||||||||||
2020 | 0.20 | 0.67 | 1.78 | 0.61 | 0.63 | 0.58 | 0.23 | 0.25 | 0.26 | 0.56 | 1.00 | 0.20 | 1.78 | |||||||||||||
2021 | 0.27 | 0.25 | 0.56 | 0.54 | 0.53 | 0.20 | 0.62 | 0.71 | 0.33 | 0.57 | 0.14 | 0.23 | 0.71 | |||||||||||||
2022 | 0.29 | 0.15 | 0.11 | 0.53 | 0.80 | 1.75 | 0.25 | 0.20 | 0.39 | 0.52 | 0.71 | 0.40 | a | 1.75 | a | |||||||||||
2023 | 0.47 | 0.21 | 0.31 | 0.41 | 0.47 | 0.37 | 0.13 | 0.72 | 0.50 | 0.62 | 0.25 | 0.11 | 0.72 | |||||||||||||
2024 | 0.04 | 0.52 | 0.50 | 0.25 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.34 | 0.28 | 0.41 | 0.39 | 0.54 | 0.62 | 0.49 | 0.48 | 0.48 | 0.45 | 0.41 | 0.37 | 1.04 | |||||||||||||
S.D. | 0.22 | 0.17 | 0.29 | 0.17 | 0.23 | 0.38 | 0.22 | 0.30 | 0.32 | 0.25 | 0.24 | 0.23 | 0.35 | |||||||||||||
SKEW | 1.26 | 1.55 | 2.16 | 0.49 | 1.12 | 1.89 | 0.64 | 1.03 | 1.32 | 0.89 | 1.25 | 1.70 | 1.25 | |||||||||||||
MAX | 1.10 | 0.95 | 1.78 | 0.92 | 1.24 | 2.23 | 1.15 | 1.50 | 1.60 | 1.26 | 1.33 | 1.36 | 2.23 | |||||||||||||
MIN | 0.03 | 0.07 | 0.07 | 0.08 | 0.16 | 0.15 | 0.06 | 0.06 | 0.02 | 0.00 | 0.00 | 0.03 | 0.56 | |||||||||||||
YRS | 69 | 74 | 68 | 68 | 71 | 73 | 73 | 75 | 71 | 72 | 72 | 67 | 44 |