YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1945 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1946 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1964 | ----- | z | ----- | z | 0.10 | j | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.75 | 0.60 | 0.90 | 0.95 | ----- | z | ||||
1966 | 0.70 | 0.30 | 1.00 | 0.52 | 0.38 | 0.70 | 0.25 | 0.93 | 0.63 | 1.27 | 0.54 | 0.39 | 1.27 | |||||||||||||
1967 | 0.50 | 0.40 | 0.62 | 0.50 | 0.92 | 1.75 | 0.70 | 0.82 | 0.19 | 2.00 | 0.70 | 0.80 | 2.00 | |||||||||||||
1968 | 0.16 | 0.40 | 0.50 | 0.65 | 1.21 | 0.90 | 0.90 | 1.15 | 1.40 | 0.60 | 0.80 | 0.28 | 1.40 | |||||||||||||
1969 | 0.56 | 0.24 | 0.60 | 0.50 | 0.80 | 0.57 | 0.91 | 2.00 | 0.50 | 0.90 | 0.40 | 0.24 | 2.00 | |||||||||||||
1970 | 0.16 | 0.04 | 0.25 | 0.90 | 1.00 | 0.60 | 0.95 | 0.25 | 1.20 | 0.68 | 0.90 | 0.66 | 1.20 | |||||||||||||
1971 | 0.40 | 0.32 | 0.60 | 1.00 | 0.65 | 2.90 | 0.38 | 0.50 | 0.75 | 0.90 | 0.75 | 0.90 | 2.90 | |||||||||||||
1972 | 0.56 | 0.24 | 0.90 | a | ----- | z | 1.00 | 3.52 | 1.60 | c | 1.35 | 1.25 | 0.60 | b | 1.20 | d | ----- | z | ----- | z | ||||||
1973 | ----- | z | ----- | z | 1.00 | a | 0.50 | j | 1.78 | c | 0.80 | a | 1.25 | b | 0.95 | d | 1.00 | e | 0.90 | a | 1.00 | h | ----- | z | ----- | z |
1974 | ----- | z | ----- | z | ----- | z | ----- | z | 0.95 | h | ----- | z | ----- | z | 0.15 | v | ----- | z | 0.70 | 1.05 | g | 0.03 | k | ----- | z | |
1975 | 0.02 | s | 0.20 | g | 1.00 | 0.80 | 0.92 | 1.06 | 0.62 | 1.31 | 0.92 | 0.35 | 1.10 | 0.77 | ----- | z | ||||||||||
1976 | 0.25 | 0.50 | 1.16 | 1.30 | 0.49 | 0.55 | 1.94 | 0.20 | 0.73 | 0.48 | 0.60 | 0.12 | p | 1.94 | p | |||||||||||
1977 | ----- | z | 0.25 | 1.60 | 0.58 | 0.70 | 0.77 | 1.99 | 0.61 | 1.38 | 1.06 | 0.34 | 0.90 | ----- | z | |||||||||||
1978 | 0.17 | j | 0.12 | f | 0.40 | d | 0.46 | 2.42 | 0.33 | 1.00 | 2.04 | 4.10 | 0.35 | 1.12 | 0.70 | 4.10 | t | |||||||||
1979 | 1.15 | 0.50 | 1.99 | 0.34 | 1.05 | 1.70 | 1.12 | 0.68 | 1.05 | 1.74 | 0.83 | 0.20 | 1.99 | |||||||||||||
1980 | 0.33 | m | 0.25 | 0.14 | 2.65 | 1.93 | 1.20 | 1.22 | 0.58 | 1.41 | 0.58 | 0.60 | 0.21 | 2.65 | m | |||||||||||
1981 | 0.28 | 0.34 | 0.19 | d | 1.73 | h | 0.79 | 1.05 | 0.21 | 1.47 | 0.44 | 1.84 | 0.58 | 0.72 | 1.84 | l | ||||||||||
1982 | 0.67 | 0.10 | 0.19 | 0.81 | 0.72 | 0.42 | 3.04 | 1.44 | 0.53 | 2.24 | 0.43 | c | 0.75 | 3.04 | c | |||||||||||
1983 | 0.35 | 0.53 | 1.03 | 0.89 | 2.53 | 2.64 | 0.41 | 1.03 | 1.48 | 1.95 | 0.85 | 0.63 | 2.64 | |||||||||||||
1984 | 0.30 | 0.73 | 1.73 | 1.52 | o | 0.26 | 0.73 | 0.54 | 0.86 | a | 1.42 | 0.34 | 0.27 | f | 0.50 | 1.73 | v | |||||||||
1985 | 0.55 | 1.26 | 1.03 | 0.51 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.02 | q | 1.22 | d | 0.70 | h | ----- | z | |||
1986 | 0.34 | i | 0.38 | a | 0.92 | a | 0.59 | 0.13 | 1.49 | 1.08 | 0.63 | 0.69 | 2.30 | 1.10 | g | 0.13 | 2.30 | r | ||||||||
1987 | 0.35 | b | 0.15 | a | 0.51 | 0.70 | 0.75 | b | 1.54 | 1.35 | c | 1.54 | 0.85 | c | 0.72 | a | 1.25 | d | 0.54 | m | ----- | z | ||||
1988 | 0.20 | c | 1.06 | d | 0.37 | c | 0.18 | 0.35 | a | 0.28 | 0.90 | 2.27 | e | 0.75 | a | 0.79 | 1.55 | c | 0.27 | j | ----- | z | ||||
1989 | 0.15 | e | 0.21 | e | ----- | z | 0.34 | 0.78 | 2.14 | 0.81 | 0.43 | b | 0.66 | 0.49 | b | 0.23 | f | 0.25 | c | ----- | z | |||||
1990 | 0.15 | f | ----- | z | 0.48 | b | 0.63 | 0.61 | 2.00 | 1.04 | 0.22 | b | 1.53 | 1.60 | 0.63 | d | 0.24 | ----- | z | |||||||
1991 | 0.20 | h | 0.50 | 1.40 | 0.56 | 0.67 | 0.77 | a | 0.88 | b | 0.29 | 0.81 | 1.01 | 0.86 | e | 0.29 | a | 1.40 | q | |||||||
1992 | 0.18 | 0.20 | 0.32 | 0.63 | 0.80 | 0.14 | a | 1.24 | h | 1.04 | c | 0.86 | c | 0.85 | a | 1.35 | 0.00 | x | ----- | z | ||||||
1993 | 0.37 | w | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.37 | t | 0.11 | ----- | z | |
1994 | 0.40 | d | 0.03 | i | 0.90 | 0.78 | 0.53 | g | 0.45 | d | 0.71 | b | 0.59 | 0.97 | d | 0.73 | e | 0.30 | f | 0.10 | a | ----- | z | |||
1995 | 0.49 | v | 0.22 | 0.09 | w | 0.60 | q | 0.46 | a | 0.18 | c | 0.68 | 0.71 | c | 1.53 | ----- | z | 1.58 | a | 0.46 | b | ----- | z | |||
1996 | 0.99 | e | 0.67 | n | 0.47 | k | 0.74 | a | 0.66 | 1.48 | ----- | z | ----- | z | 1.50 | d | 0.70 | 0.37 | c | 0.63 | b | ----- | z | |||
1997 | 0.64 | a | 0.32 | d | 0.52 | k | 0.25 | h | 0.74 | 0.53 | 2.30 | l | 2.64 | n | 1.91 | r | 1.70 | a | 0.43 | b | 0.43 | ----- | z | |||
1998 | 0.23 | 0.04 | g | 0.42 | 0.02 | d | 1.30 | 1.63 | a | 2.40 | c | 2.00 | 0.75 | a | 0.69 | i | 0.65 | i | 0.33 | ----- | z | |||||
1999 | 0.59 | g | 0.36 | m | 0.20 | a | 0.25 | d | 2.00 | h | 1.55 | k | 0.75 | i | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.62 | b | 1.41 | f | 0.45 | g | 0.78 | a | 0.74 | d | 0.53 | c | 0.78 | i | ----- | z |
2004 | 0.28 | a | 0.43 | a | 0.52 | c | 1.64 | i | 0.76 | e | 0.34 | d | 1.09 | a | 0.74 | f | 0.45 | k | 0.72 | e | 1.39 | b | 0.38 | f | ----- | z |
2005 | 0.26 | b | 0.43 | c | 0.25 | c | 0.90 | c | 0.32 | g | 1.09 | c | 0.32 | o | 0.59 | c | 3.50 | b | 0.95 | j | 1.41 | t | 0.19 | v | ----- | z |
2006 | 0.36 | t | 0.38 | l | 0.21 | p | 0.02 | y | 5.93 | g | 0.40 | m | 0.39 | j | 0.78 | 0.41 | b | 0.50 | 0.32 | v | 1.00 | j | ----- | z | ||
2007 | 1.34 | a | 0.41 | b | 1.20 | h | 1.55 | h | 0.72 | l | 0.30 | p | 0.47 | h | 1.40 | y | 2.54 | i | 1.95 | d | 0.12 | q | 0.34 | s | ----- | z |
2008 | 0.41 | l | 0.05 | y | 0.18 | l | 0.62 | r | 0.49 | r | 0.88 | 0.40 | 0.50 | 0.99 | 0.46 | 0.73 | 0.29 | ----- | z | |||||||
2009 | 0.24 | 0.74 | 0.27 | 1.89 | 0.42 | 1.12 | 1.26 | 2.02 | 1.27 | 1.36 | 0.42 | 0.54 | 2.02 | |||||||||||||
2010 | 0.22 | 0.41 | 0.12 | 0.35 | 0.35 | 1.03 | 0.85 | 1.00 | 2.78 | 0.51 | 0.66 | 0.35 | 2.78 | |||||||||||||
2011 | 0.32 | 0.15 | 0.57 | 1.07 | 1.02 | 1.27 | 0.25 | 0.37 | 2.01 | 1.22 | 1.01 | 0.53 | 2.01 | |||||||||||||
2012 | 0.51 | 0.32 | 0.64 | ----- | z | 0.65 | 1.61 | 1.67 | 0.28 | 1.01 | 0.95 | 0.61 | 0.62 | ----- | z | |||||||||||
2013 | 0.65 | 0.55 | 0.56 | 0.83 | 0.71 | 1.00 | 1.91 | 2.54 | 0.28 | 0.67 | 1.02 | 0.67 | 2.54 | |||||||||||||
2014 | 0.41 | 0.54 | 0.62 | 0.87 | 0.70 | 0.50 | 0.83 | 0.90 | 3.34 | 1.26 | 1.46 | 0.81 | 3.34 | |||||||||||||
2015 | 0.29 | 0.23 | 0.39 | 1.16 | 1.13 | b | 1.56 | 0.71 | 0.30 | k | 0.66 | 0.52 | 0.94 | 1.91 | 1.91 | m | ||||||||||
2016 | 0.30 | 0.69 | 1.31 | 1.02 | 0.99 | 1.17 | 0.94 | 2.26 | 1.38 | 0.78 | 0.39 | 0.76 | 2.26 | |||||||||||||
2017 | 0.35 | 0.59 | 0.34 | 0.85 | 1.54 | 0.75 | 0.97 | 2.22 | 0.57 | 1.19 | 0.65 | 0.41 | 2.22 | |||||||||||||
2018 | 1.05 | 0.42 | 0.30 | 1.11 | 0.74 | 0.67 | 1.93 | 1.20 | 1.99 | 1.68 | 0.45 | 0.49 | 1.99 | |||||||||||||
2019 | 0.38 | 1.48 | 0.29 | 1.05 | 1.11 | 0.80 | 0.69 | 0.80 | 1.08 | 1.00 | 0.78 | 1.03 | 1.48 | |||||||||||||
2020 | 0.54 | 0.32 | 0.67 | 1.43 | 1.03 | 0.77 | 0.89 | 1.45 | 0.99 | 0.74 | 0.52 | 0.44 | 1.45 | |||||||||||||
2021 | 0.36 | 0.63 | 1.26 | 0.70 | 0.22 | 1.50 | 0.63 | 0.95 | 1.08 | 0.43 | 0.51 | 0.83 | 1.50 | |||||||||||||
2022 | 0.50 | 0.72 | 1.05 | 1.65 | 1.17 | 0.65 | 0.38 | 0.54 | 1.08 | 1.09 | 1.12 | 0.35 | 1.65 | |||||||||||||
2023 | 1.09 | 0.38 | 0.48 | 1.57 | 1.36 | 1.41 | 0.63 | 0.78 | 0.88 | 0.89 | 0.41 | 0.78 | 1.57 | |||||||||||||
2024 | 0.43 | 0.28 | 0.06 | o | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.47 | 0.45 | 0.69 | 0.84 | 0.90 | 1.09 | 1.02 | 1.05 | 1.19 | 0.99 | 0.81 | 0.56 | 2.06 | |||||||||||||
S.D. | 0.29 | 0.29 | 0.45 | 0.49 | 0.51 | 0.70 | 0.60 | 0.64 | 0.79 | 0.53 | 0.35 | 0.33 | 0.61 | |||||||||||||
SKEW | 1.39 | 1.74 | 0.97 | 1.42 | 1.39 | 1.37 | 1.29 | 0.76 | 2.01 | 0.95 | 0.62 | 1.56 | 0.48 | |||||||||||||
MAX | 1.34 | 1.48 | 1.99 | 2.65 | 2.53 | 3.52 | 3.04 | 2.54 | 4.10 | 2.30 | 1.58 | 1.91 | 3.34 | |||||||||||||
MIN | 0.15 | 0.04 | 0.12 | 0.02 | 0.13 | 0.14 | 0.21 | 0.20 | 0.19 | 0.34 | 0.34 | 0.10 | 1.20 | |||||||||||||
YRS | 41 | 43 | 45 | 40 | 45 | 49 | 44 | 45 | 49 | 50 | 44 | 42 | 22 |