YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.23 | 0.15 | ----- | z | ||
1955 | 0.03 | 0.48 | 0.30 | 2.32 | 0.48 | 1.75 | 0.29 | 1.20 | 0.51 | 0.24 | 0.07 | 0.39 | 2.32 | |||||||||||||
1956 | 0.20 | 0.25 | 0.82 | 0.60 | 0.83 | 1.97 | 1.51 | 0.72 | 0.28 | 0.35 | 1.24 | 0.17 | 1.97 | |||||||||||||
1957 | 0.07 | 0.20 | 0.73 | 0.35 | 0.88 | 0.86 | 2.61 | a | 0.82 | 0.75 | 0.84 | 0.76 | 0.12 | 2.61 | a | |||||||||||
1958 | 0.13 | 0.09 | 0.30 | 1.52 | 1.06 | 1.52 | 1.23 | 0.49 | 0.73 | 0.16 | 0.31 | 0.07 | 1.52 | |||||||||||||
1959 | 0.11 | 1.24 | a | 0.73 | 0.93 | 2.87 | 1.89 | 0.42 | 3.04 | 1.12 | 0.70 | 0.49 | 0.50 | 3.04 | a | |||||||||||
1960 | 0.11 | 0.20 | 0.24 | 0.42 | 3.85 | 2.12 | 0.40 | 0.58 | 1.43 | 0.25 | 0.87 | 0.46 | 3.85 | |||||||||||||
1961 | 0.06 | 1.09 | 1.12 | 0.38 | 1.60 | 1.64 | 1.90 | 2.25 | 1.51 | 0.87 | 0.60 | 0.18 | 2.25 | |||||||||||||
1962 | 0.03 | 0.75 | 0.50 | 0.65 | 1.00 | 1.70 | 2.23 | 3.95 | 0.65 | 0.68 | 0.12 | 0.20 | 3.95 | |||||||||||||
1963 | 0.40 | 0.06 | 0.80 | 0.33 | 0.93 | 1.65 | 1.78 | 0.36 | 0.75 | 0.88 | 0.25 | 0.10 | 1.78 | |||||||||||||
1964 | 0.20 | 0.10 | 0.24 | 2.17 | 1.38 | 1.54 | 1.74 | 1.47 | 2.57 | 0.80 | 0.28 | 0.70 | 2.57 | |||||||||||||
1965 | 0.23 | 0.60 | ----- | z | ----- | z | 0.67 | g | 0.69 | 0.50 | 0.41 | 1.48 | ----- | z | 0.30 | l | 0.67 | ----- | z | |||||||
1966 | ----- | z | ----- | z | ----- | z | ----- | z | 0.80 | m | 2.80 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |
1967 | ----- | z | ----- | z | ----- | z | 0.30 | i | 1.20 | 1.35 | 0.65 | 3.00 | 0.70 | 0.55 | 0.00 | 0.17 | ----- | z | ||||||||
1968 | 0.34 | 0.10 | 0.15 | 1.32 | 0.85 | 1.30 | 1.50 | 0.45 | 1.80 | 1.90 | 0.18 | 0.60 | 1.90 | |||||||||||||
1969 | 0.60 | 0.75 | 1.75 | 0.71 | 1.90 | 3.25 | 1.55 | 3.10 | 0.75 | 0.90 | 0.25 | 0.50 | 3.25 | |||||||||||||
1970 | 0.10 | 0.00 | 0.80 | 0.70 | 0.75 | 0.50 | 1.25 | 2.50 | 0.80 | 2.25 | 1.20 | 0.80 | 2.50 | |||||||||||||
1971 | 0.50 | 1.70 | 0.50 | 0.75 | 1.20 | 2.00 | 2.22 | 0.63 | 1.25 | 1.60 | 0.60 | 0.25 | 2.22 | |||||||||||||
1972 | 0.40 | 0.25 | 0.25 | 1.10 | 0.90 | 1.10 | 1.75 | 0.80 | 1.00 | 1.40 | 1.30 | 0.50 | 1.75 | |||||||||||||
1973 | 0.40 | 0.30 | 0.75 | 1.30 | 1.40 | 1.00 | 1.10 | 0.65 | 2.00 | 0.45 | 2.00 | 0.55 | 2.00 | |||||||||||||
1974 | 0.10 | 0.15 | 0.60 | 1.00 | 1.30 | 2.10 | 0.75 | 1.40 | 0.80 | 0.40 | 0.80 | 0.25 | 2.10 | |||||||||||||
1975 | 1.25 | 0.80 | 1.00 | 1.50 | 1.60 | 2.00 | 1.30 | 0.95 | 0.85 | 0.10 | 1.55 | 0.65 | 2.00 | |||||||||||||
1976 | 0.10 | 0.50 | 0.75 | 0.80 | 0.40 | 0.95 | 1.00 | 0.90 | 1.00 | 0.50 | 0.00 | 0.30 | 1.00 | |||||||||||||
1977 | ----- | z | 0.50 | 1.45 | 1.20 | 0.40 | a | 2.25 | ----- | z | 1.50 | 2.35 | 1.40 | 1.20 | 0.15 | b | ----- | z | ||||||||
1978 | 0.15 | 0.25 | 0.25 | 1.55 | 0.80 | 1.50 | 1.76 | 1.10 | 0.52 | 0.43 | 0.79 | 0.73 | 1.76 | |||||||||||||
1979 | 0.70 | 0.35 | 0.86 | 0.75 | 1.30 | 0.78 | 1.24 | 4.12 | 0.62 | 1.92 | 0.97 | 0.36 | 4.12 | |||||||||||||
1980 | 0.90 | 0.57 | 0.44 | 0.95 | 1.45 | 0.26 | 0.80 | 2.15 | 1.52 | 0.71 | 0.10 | 0.11 | 2.15 | |||||||||||||
1981 | 0.11 | 0.61 | 0.80 | 0.55 | 2.20 | 3.02 | 2.25 | 1.22 | 0.42 | 0.98 | 0.10 | 0.45 | 3.02 | |||||||||||||
1982 | 0.80 | 0.14 | 0.52 | 0.51 | 1.61 | 1.78 | 2.41 | 1.80 | 1.98 | 1.13 | 1.25 | 1.18 | 2.41 | |||||||||||||
1983 | 0.25 | 0.35 | d | 1.88 | 0.85 | 1.21 | 1.15 | 0.62 | 0.71 | 1.27 | 0.70 | 1.73 | 0.13 | 1.88 | d | |||||||||||
1984 | 0.00 | a | 0.70 | 0.60 | a | 1.10 | 0.96 | 1.25 | 0.54 | 0.12 | 0.41 | 1.25 | 1.48 | 0.94 | 1.48 | b | ||||||||||
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.64 | 1.03 | 1.76 | 2.63 | 0.43 | 0.60 | 0.30 | ----- | z | |||||||
1986 | 0.15 | 0.00 | 1.55 | 1.58 | 1.22 | 0.37 | 1.10 | 1.40 | 1.53 | ----- | z | ----- | z | ----- | z | ----- | z | |||||||||
1987 | ----- | z | ----- | z | ----- | z | ----- | z | 1.16 | 0.92 | 1.87 | 0.97 | 0.41 | 0.37 | 0.44 | 0.85 | ----- | z | ||||||||
1988 | 0.45 | 0.13 | 0.32 | 0.94 | 0.63 | 0.78 | 0.96 | 1.60 | 1.00 | 0.10 | 0.46 | 0.48 | 1.60 | |||||||||||||
1989 | 0.12 | 0.03 | 0.45 | 1.34 | 0.33 | 0.95 | 1.63 | 1.50 | 1.42 | 0.24 | 0.22 | 0.06 | 1.63 | |||||||||||||
1990 | 0.07 | 0.12 | 0.63 | 1.18 | 1.95 | 1.63 | 1.96 | 1.51 | 1.30 | 0.56 | 0.22 | 0.48 | b | 1.96 | b | |||||||||||
1991 | 0.21 | 0.39 | 0.91 | 0.80 | 1.83 | 4.00 | 1.30 | 1.66 | 0.81 | 0.41 | 1.15 | 0.78 | 4.00 | |||||||||||||
1992 | 0.30 | 0.68 | 1.15 | 0.67 | 0.80 | 0.81 | 1.50 | 1.80 | 0.85 | 2.84 | 1.50 | 0.46 | 2.84 | |||||||||||||
1993 | 0.50 | 0.34 | 1.33 | a | 1.68 | 3.13 | 1.60 | 2.25 | 4.50 | 2.08 | 0.20 | 0.40 | a | 0.47 | 4.50 | b | ||||||||||
1994 | 0.50 | a | 0.20 | 0.02 | 1.50 | 0.36 | 2.36 | 1.52 | 0.82 | 1.88 | 0.97 | 0.94 | 0.26 | 2.36 | a | |||||||||||
1995 | 0.14 | 0.03 | a | 0.53 | a | 0.83 | 1.67 | 1.14 | 0.91 | 1.79 | 1.98 | 1.16 | 0.40 | 0.27 | 1.98 | b | ||||||||||
1996 | 0.76 | 0.07 | 0.90 | a | 0.32 | 0.70 | 1.22 | 0.98 | 2.46 | 0.54 | 0.70 | 0.75 | 0.24 | 2.46 | a | |||||||||||
1997 | 0.30 | 0.15 | 0.23 | 0.76 | 1.15 | 1.21 | 1.32 | 0.70 | 0.95 | 2.20 | 0.20 | 0.14 | 2.20 | |||||||||||||
1998 | 0.30 | 0.34 | 1.00 | 0.45 | 3.00 | 0.80 | e | 1.60 | 1.40 | 0.53 | 1.80 | 0.52 | a | 0.04 | a | 3.00 | g | |||||||||
1999 | 0.56 | d | 0.15 | 0.62 | 1.50 | 0.54 | 1.60 | 2.03 | 0.26 | 0.31 | 0.56 | a | 0.58 | 0.12 | 2.03 | e | ||||||||||
2000 | 1.00 | 0.28 | a | 0.50 | 0.74 | 1.86 | 0.95 | 1.33 | 1.15 | 0.16 | 0.54 | 0.85 | a | 0.65 | a | 1.86 | c | |||||||||
2001 | 0.50 | c | 1.25 | b | 0.60 | 1.99 | 1.50 | 1.90 | a | 0.90 | 0.60 | 0.51 | 0.67 | 1.05 | a | 0.35 | a | 1.99 | h | |||||||
2002 | 0.17 | c | 0.50 | c | 1.10 | ----- | z | ----- | z | 0.18 | q | 1.91 | 1.78 | 0.93 | b | 1.82 | 0.08 | 0.13 | ----- | z | ||||||
2003 | 0.10 | 0.63 | 1.15 | 0.64 | 1.17 | c | 1.00 | 0.73 | 0.46 | 1.88 | 0.09 | 0.39 | 0.30 | 1.88 | c | |||||||||||
2004 | 0.01 | i | 0.66 | 1.22 | 0.84 | 3.32 | 1.63 | c | 1.26 | 1.45 | 6.82 | d | 1.76 | 0.56 | 0.10 | 6.82 | p | |||||||||
2005 | 0.24 | 0.94 | 2.10 | h | 1.02 | 1.26 | 0.87 | d | 1.83 | 1.58 | a | 3.12 | 0.65 | 0.74 | 0.29 | 3.12 | m | |||||||||
2006 | 0.12 | d | 0.32 | f | 0.82 | 1.39 | 0.24 | 0.96 | a | 0.19 | 3.80 | 0.94 | c | 0.08 | 0.49 | 0.80 | a | 3.80 | o | |||||||
2007 | 0.81 | 0.23 | e | 2.58 | d | 0.73 | a | 0.84 | 0.96 | d | 2.20 | 3.14 | c | 1.57 | e | 3.61 | 0.11 | 1.14 | b | 3.61 | x | |||||
2008 | 0.25 | a | 0.30 | h | 0.18 | 1.77 | a | 1.45 | b | 1.99 | b | 0.65 | d | 0.48 | f | 0.43 | b | 0.84 | b | 0.57 | a | 0.76 | c | ----- | z | |
2009 | 0.29 | c | 0.14 | c | 0.65 | c | 0.96 | 1.05 | 2.16 | c | 2.28 | e | 0.69 | i | 2.57 | b | 1.39 | a | 0.61 | 0.83 | ----- | z | ||||
2010 | 0.48 | 0.23 | j | 0.71 | d | 1.15 | 1.01 | 1.26 | 2.46 | 1.06 | 1.44 | 0.88 | 1.37 | 0.96 | 2.46 | n | ||||||||||
2011 | 0.52 | i | 0.56 | 0.83 | i | 0.87 | 1.01 | 2.22 | d | 1.13 | 0.17 | f | 0.48 | 0.31 | 0.09 | 0.43 | ----- | z | ||||||||
2012 | 0.66 | 1.51 | 0.42 | 1.20 | b | 1.22 | b | 1.14 | 0.31 | 0.95 | 0.41 | 0.95 | 0.18 | 0.45 | 1.51 | d | ||||||||||
2013 | 0.14 | 0.67 | 0.81 | c | 1.67 | 3.24 | d | 2.89 | c | 0.95 | 0.65 | j | 0.22 | 1.02 | a | 0.59 | a | 0.14 | c | 3.24 | y | |||||
2014 | 0.15 | b | 0.33 | g | 0.57 | 1.58 | a | 1.20 | a | 1.74 | 3.11 | j | 0.84 | l | 0.96 | 1.08 | 0.29 | b | 0.43 | ----- | z | |||||
2015 | 0.21 | c | 0.64 | l | 0.40 | e | 0.70 | e | 1.72 | g | 1.25 | 1.24 | e | 1.87 | i | 2.38 | b | 0.70 | 1.43 | f | 0.91 | ----- | z | |||
2016 | 0.23 | d | 1.46 | l | 0.94 | c | 0.86 | r | 1.01 | b | 1.39 | e | 3.39 | g | 0.78 | l | 2.08 | a | 1.59 | d | 0.42 | 1.03 | ----- | z | ||
2017 | 0.46 | 0.53 | 0.91 | p | 0.69 | 0.97 | 1.27 | d | 0.74 | 2.93 | 1.11 | 1.70 | b | 0.10 | k | 0.18 | d | ----- | z | |||||||
2018 | 0.62 | 0.40 | 1.18 | m | 0.86 | 1.63 | a | 2.67 | c | 1.64 | 2.42 | 3.20 | 1.03 | 0.35 | 0.61 | 3.20 | q | |||||||||
2019 | 0.32 | 0.64 | 1.30 | a | 1.17 | 2.19 | a | 1.68 | a | 1.19 | a | 0.75 | 1.62 | 0.82 | 0.65 | 0.95 | a | 2.19 | e | |||||||
2020 | 0.26 | 0.33 | b | 1.16 | 0.62 | 3.34 | a | 1.83 | 0.76 | a | 0.51 | c | 3.61 | 0.95 | 1.01 | a | 0.32 | 3.61 | h | |||||||
2021 | 0.36 | 0.36 | 0.88 | 0.59 | 0.84 | b | 0.46 | 2.08 | 3.92 | 1.54 | j | 1.30 | a | 0.33 | a | 0.47 | 3.92 | n | ||||||||
2022 | 0.81 | 0.08 | 0.82 | 0.53 | 0.49 | 1.43 | 2.02 | 2.89 | b | 0.71 | 0.21 | 0.56 | 0.50 | 2.89 | b | |||||||||||
2023 | 0.77 | d | 1.05 | c | 0.39 | f | 0.58 | g | 1.98 | f | 1.45 | k | 1.02 | m | 1.82 | m | 0.00 | w | 1.88 | d | 0.08 | 0.65 | ----- | z | ||
2024 | 0.17 | e | 0.14 | d | 1.78 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.35 | 0.44 | 0.79 | 1.01 | 1.36 | 1.51 | 1.36 | 1.60 | 1.32 | 0.95 | 0.62 | 0.45 | 2.38 | |||||||||||||
S.D. | 0.27 | 0.38 | 0.48 | 0.47 | 0.81 | 0.72 | 0.62 | 1.09 | 1.04 | 0.69 | 0.47 | 0.29 | 0.81 | |||||||||||||
SKEW | 1.13 | 1.30 | 1.21 | 0.75 | 1.31 | 0.93 | 0.06 | 0.96 | 2.54 | 1.33 | 0.86 | 0.60 | 1.02 | |||||||||||||
MAX | 1.25 | 1.70 | 2.58 | 2.32 | 3.85 | 4.00 | 2.61 | 4.50 | 6.82 | 3.61 | 2.00 | 1.18 | 4.50 | |||||||||||||
MIN | 0.00 | 0.00 | 0.02 | 0.32 | 0.24 | 0.26 | 0.19 | 0.12 | 0.16 | 0.08 | 0.00 | 0.04 | 1.00 | |||||||||||||
YRS | 63 | 60 | 60 | 61 | 63 | 67 | 64 | 60 | 66 | 66 | 65 | 68 | 40 |