YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.72 | 3.04 | 0.70 | 0.05 | 0.05 | ----- | z | |||||
1942 | 0.07 | 0.62 | 0.07 | 1.29 | 0.19 | 1.95 | 0.13 | 1.92 | 0.45 | 0.76 | 0.03 | 0.53 | 1.95 | |||||||||||||
1943 | 0.11 | 0.02 | 0.05 | 0.52 | 0.74 | 0.26 | 0.91 | 2.81 | 0.08 | 0.52 | 0.02 | 0.65 | 2.81 | |||||||||||||
1944 | 0.56 | 0.17 | 0.48 | 1.14 | 1.60 | 0.24 | 1.34 | 0.66 | 0.00 | 1.07 | 0.30 | 0.21 | 1.60 | |||||||||||||
1945 | 0.58 | 0.12 | 0.03 | 0.38 | 0.25 | 0.60 | 0.57 | 1.00 | 0.82 | 0.15 | 0.06 | 0.07 | 1.00 | |||||||||||||
1946 | 0.20 | 0.41 | 0.66 | 0.35 | 2.24 | 0.59 | 0.53 | 1.06 | 0.11 | 1.05 | 1.10 | 0.00 | 2.24 | |||||||||||||
1947 | 0.08 | 0.08 | 0.66 | 0.50 | 0.98 | 0.35 | 0.27 | 0.40 | 0.07 | 0.29 | 0.05 | 0.32 | a | 0.98 | a | |||||||||||
1948 | 0.12 | 0.38 | 0.59 | 0.25 | 1.27 | 1.09 | 0.43 | 1.43 | 0.19 | 0.08 | 0.03 | 0.04 | 1.43 | |||||||||||||
1949 | 0.39 | 0.03 | 0.52 | 0.52 | 1.29 | 1.90 | 0.63 | 0.91 | 0.02 | 0.32 | 0.02 | 0.00 | 1.90 | |||||||||||||
1950 | 0.06 | 0.05 | 0.21 | 0.05 | 0.58 | 0.18 | 1.21 | 0.58 | 0.96 | 0.12 | 0.05 | 0.10 | 1.21 | |||||||||||||
1951 | 0.36 | 0.00 | 0.07 | 0.40 | 1.05 | 1.02 | 0.23 | 1.15 | 0.13 | 0.24 | 0.35 | 0.00 | 1.15 | |||||||||||||
1952 | 0.07 | 0.12 | 0.20 | 0.65 | 0.46 | 0.00 | 0.25 | 0.90 | 0.90 | 0.00 | 0.40 | 0.01 | 0.90 | |||||||||||||
1953 | 0.15 | 0.00 | 1.45 | 0.28 | 0.84 | 0.31 | 0.47 | 0.87 | 0.00 | 0.07 | 0.57 | 0.50 | 1.45 | |||||||||||||
1954 | 0.17 | 0.01 | 0.25 | 0.09 | 1.25 | 0.09 | 2.30 | 0.18 | 0.17 | 1.18 | 0.02 | 0.12 | 2.30 | |||||||||||||
1955 | 0.00 | 0.00 | 0.03 | 0.40 | 1.78 | 0.29 | 0.65 | 2.11 | 0.66 | 0.10 | 0.05 | 0.07 | 2.11 | |||||||||||||
1956 | 0.14 | 0.10 | 0.00 | 0.39 | 0.29 | 0.51 | 0.68 | 1.46 | 0.02 | 0.03 | 0.16 | 0.00 | 1.46 | |||||||||||||
1957 | 0.08 | 0.00 | 0.12 | 0.90 | 1.33 | 0.41 | 0.49 | 0.50 | 0.74 | 0.42 | 0.33 | 0.00 | 1.33 | |||||||||||||
1958 | 0.25 | 0.13 | 0.49 | 0.35 | 1.03 | 0.73 | 0.92 | 1.25 | 0.18 | 0.11 | 0.25 | 0.05 | 1.25 | |||||||||||||
1959 | 0.16 | 0.21 | 0.15 | 0.22 | 0.71 | 0.42 | 0.30 | 0.56 | 0.45 | 0.72 | 0.09 | 0.00 | 0.72 | |||||||||||||
1960 | 0.86 | 0.60 | 0.13 | 0.89 | 0.40 | 0.61 | 1.87 | 0.03 | 0.46 | 1.25 | 0.11 | 0.27 | 1.87 | |||||||||||||
1961 | 0.00 | 0.19 | 0.34 | 0.10 | 0.34 | 1.15 | 3.33 | 1.43 | 0.63 | 0.10 | 0.93 | 0.11 | 3.33 | |||||||||||||
1962 | 0.14 | 0.01 | 0.32 | 0.37 | 1.10 | 0.66 | 1.65 | 0.09 | 0.12 | 0.24 | 0.36 | 0.09 | 1.65 | |||||||||||||
1963 | 0.10 | 0.06 | 0.11 | 0.00 | 0.73 | 0.63 | 0.28 | 0.89 | 0.45 | 0.16 | 0.39 | 0.20 | 0.89 | |||||||||||||
1964 | 0.00 | 0.18 | 0.03 | 0.50 | 3.75 | 0.15 | 0.65 | 0.31 | 0.40 | 0.11 | 0.13 | 0.13 | 3.75 | |||||||||||||
1965 | 0.03 | 0.10 | 0.19 | 0.05 | 2.43 | 1.29 | 1.54 | 0.12 | 0.30 | 2.00 | 0.03 | 0.29 | 2.43 | |||||||||||||
1966 | 0.15 | 0.47 | 0.00 | 0.65 | 0.01 | 0.21 | 0.38 | 1.47 | 1.42 | 0.45 | 0.00 | 0.26 | 1.47 | |||||||||||||
1967 | 0.09 | 0.00 | 0.08 | 0.10 | 1.44 | 0.28 | 0.31 | 0.19 | 0.55 | 0.34 | 0.31 | 0.05 | 1.44 | |||||||||||||
1968 | 0.02 | 0.07 | 0.19 | 0.40 | 0.39 | 0.75 | 1.49 | 0.48 | 0.57 | 0.38 | 0.02 | 0.12 | 1.49 | |||||||||||||
1969 | 0.02 | 0.09 | 0.38 | 1.10 | 0.42 | 0.57 | 0.33 | 1.06 | 1.19 | 0.48 | 0.16 | 0.15 | 1.19 | |||||||||||||
1970 | 0.00 | 0.00 | 0.20 | 0.44 | 0.55 | 0.82 | 0.75 | 1.06 | 0.75 | 0.56 | 0.03 | 0.00 | 1.06 | |||||||||||||
1971 | 0.11 | 1.26 | 0.03 | 0.51 | 1.85 | 0.60 | 1.71 | 1.20 | 0.42 | 0.47 | 0.71 | 0.06 | 1.85 | |||||||||||||
1972 | 0.13 | 0.03 | 0.17 | 0.63 | 0.62 | 0.52 | 0.21 | 1.36 | 0.35 | 0.47 | 0.25 | 0.34 | 1.36 | |||||||||||||
1973 | 0.01 | 0.00 | 0.73 | 0.62 | 0.43 | ----- | z | ----- | z | ----- | z | 0.52 | 0.38 | 0.40 | 0.13 | ----- | z | |||||||||
1974 | 0.06 | ----- | z | ----- | z | 0.00 | 0.00 | 0.62 | 1.15 | 0.02 | 0.00 | a | 1.35 | ----- | z | ----- | z | ----- | z | |||||||
1975 | ----- | z | 0.06 | 0.24 | 0.36 | 0.26 | 1.46 | 0.89 | 0.95 | 0.31 | 0.00 | 0.97 | a | 0.04 | ----- | z | ||||||||||
1976 | 0.12 | ----- | z | 0.07 | 0.78 | 0.56 | 0.11 | 0.94 | 0.66 | 0.71 | 0.83 | 0.04 | 0.00 | ----- | z | |||||||||||
1977 | 0.09 | 0.04 | 0.00 | 0.75 | 1.98 | 0.52 | 0.77 | 1.17 | 0.02 | 0.03 | 0.00 | ----- | z | ----- | z | |||||||||||
1978 | 0.14 | 0.17 | ----- | z | 1.84 | 0.35 | 1.85 | 0.44 | 1.30 | 0.16 | 0.33 | a | ----- | z | 0.12 | ----- | z | |||||||||
1979 | 0.17 | 0.02 | ----- | z | 0.26 | 1.17 | 0.51 | 0.48 | 0.62 | 0.35 | 0.56 | 0.29 | 0.82 | ----- | z | |||||||||||
1980 | 0.09 | k | 0.06 | 0.74 | 1.73 | 0.72 | 0.27 | 0.25 | 0.30 | 0.88 | 0.00 | 0.29 | 0.00 | 1.73 | k | |||||||||||
1981 | ----- | z | 0.03 | 0.29 | 0.06 | 1.29 | 0.12 | 0.90 | 0.46 | 0.27 | 0.03 | 0.10 | 0.08 | ----- | z | |||||||||||
1982 | 0.01 | k | 0.15 | i | 0.30 | f | 0.13 | a | 0.39 | n | 1.23 | g | 0.99 | 0.17 | y | 1.11 | 0.46 | k | 0.00 | j | 2.00 | a | ----- | z | ||
1983 | 0.19 | k | 0.39 | 0.98 | a | 0.67 | a | 0.97 | 0.37 | f | 0.87 | a | 0.27 | b | 0.05 | 0.03 | 0.05 | b | 0.10 | 0.98 | x | |||||
1984 | 0.15 | b | 0.10 | i | 0.74 | c | 0.63 | 0.59 | a | 0.53 | a | 1.50 | 0.04 | 0.53 | i | 0.63 | e | 0.00 | j | 0.21 | ----- | z | ||||
1985 | 0.15 | b | 0.06 | e | 0.02 | 0.91 | c | 1.38 | c | 0.18 | 0.82 | h | 1.10 | a | 0.33 | b | 0.78 | b | 0.14 | 0.13 | ----- | z | ||||
1986 | 0.02 | 0.09 | 0.00 | 0.61 | b | 0.56 | 1.08 | b | 1.00 | b | 0.71 | c | 0.82 | 0.71 | d | 0.39 | b | 0.10 | b | 1.08 | q | |||||
1987 | 0.06 | 0.73 | c | 0.51 | c | 0.09 | b | 1.30 | i | 1.10 | a | 0.21 | c | 1.21 | d | 0.66 | d | 0.01 | 0.32 | b | 0.36 | c | ----- | z | ||
1988 | 0.07 | g | 0.06 | b | 0.04 | 0.42 | b | 0.28 | c | 1.98 | b | 0.66 | b | 0.49 | a | 3.20 | a | 0.02 | 0.00 | 0.07 | 3.20 | t | ||||
1989 | 0.11 | a | 0.07 | a | 0.30 | 0.02 | 1.22 | a | 0.57 | 0.40 | 1.79 | 1.25 | c | 0.13 | a | 0.04 | 0.10 | 1.79 | g | |||||||
1990 | 0.61 | b | 0.58 | a | 0.34 | c | 0.08 | 1.15 | 1.35 | 4.13 | 0.26 | 1.01 | a | 0.94 | 0.77 | 0.16 | 4.13 | g | ||||||||
1991 | 0.45 | ----- | z | 0.39 | b | 1.18 | 0.27 | 1.30 | 0.93 | b | 2.52 | b | 0.68 | a | 0.40 | a | 1.01 | e | 0.46 | a | ----- | z | ||||
1992 | 0.04 | a | 0.55 | 0.18 | b | 0.02 | 0.20 | b | 0.73 | b | 2.35 | c | 1.61 | d | 0.58 | 0.10 | a | 0.51 | a | 0.03 | a | 2.35 | q | |||
1993 | 0.08 | e | 0.36 | b | 0.33 | a | 0.51 | a | 0.42 | f | 0.82 | b | 0.53 | 0.68 | a | 0.55 | 1.01 | b | 0.68 | a | 0.02 | 1.01 | u | |||
1994 | 0.08 | 0.00 | 0.51 | 1.04 | a | 0.85 | f | 0.89 | g | 0.63 | f | 1.41 | a | 0.91 | c | 0.48 | b | 0.42 | a | 0.05 | a | ----- | z | |||
1995 | 0.37 | b | 0.09 | d | 0.25 | h | 0.95 | e | 1.17 | c | 2.90 | b | 0.91 | a | 0.66 | b | 0.33 | a | 0.01 | 0.00 | 0.07 | b | ----- | z | ||
1996 | 0.02 | 0.14 | a | 1.13 | b | 0.31 | a | 2.79 | b | 0.54 | e | 1.29 | b | 0.91 | c | 0.54 | d | 0.34 | a | 0.02 | 0.03 | 2.79 | u | |||
1997 | 0.16 | a | 0.35 | a | 0.03 | 0.81 | a | 0.51 | 0.29 | 1.62 | 1.89 | 0.98 | 1.79 | e | 0.05 | 0.24 | 1.89 | h | ||||||||
1998 | 0.00 | 0.20 | 0.73 | 0.33 | 0.55 | 0.40 | a | 2.67 | 1.20 | 0.60 | 0.28 | 1.69 | 0.05 | 2.67 | a | |||||||||||
1999 | 0.01 | 0.00 | 0.67 | 0.71 | 1.61 | 1.07 | 0.62 | 2.86 | 0.30 | 0.24 | 0.15 | 0.00 | 2.86 | |||||||||||||
2000 | 0.12 | 0.01 | 0.54 | 0.56 | b | 0.85 | 0.30 | b | 0.42 | 0.07 | 0.07 | 0.80 | 0.06 | b | 0.05 | 0.85 | f | |||||||||
2001 | 0.30 | 0.22 | 0.24 | 0.04 | 1.64 | a | 1.26 | b | 2.15 | 0.15 | 0.61 | 0.03 | 0.03 | 0.16 | 2.15 | c | ||||||||||
2002 | 0.28 | 0.00 | 0.01 | 0.44 | 0.38 | 1.48 | a | 0.35 | 1.50 | 1.95 | 0.64 | 0.06 | 0.30 | 1.95 | a | |||||||||||
2003 | 0.04 | a | 0.09 | a | 0.53 | 0.27 | 0.93 | b | 0.81 | a | 0.12 | 0.02 | b | 0.17 | 0.05 | 0.06 | a | 0.05 | 0.93 | h | ||||||
2004 | 0.09 | 0.09 | b | 0.48 | 1.35 | a | 0.19 | 0.75 | 1.32 | 1.70 | 0.69 | 0.45 | 0.30 | 0.02 | a | 1.70 | d | |||||||||
2005 | 0.19 | 0.14 | 0.36 | 0.36 | 2.32 | g | 0.55 | a | 0.37 | 0.65 | 0.03 | 0.60 | 0.07 | 0.09 | a | 2.32 | i | |||||||||
2006 | 0.32 | 0.00 | 0.38 | 0.28 | 0.50 | 0.37 | 1.53 | 1.37 | 0.98 | b | 2.63 | 0.05 | 1.40 | 2.63 | b | |||||||||||
2007 | 1.22 | c | 0.14 | a | 0.00 | b | 0.56 | 1.28 | 1.64 | 1.11 | a | 0.98 | 0.32 | 0.65 | 0.00 | 0.05 | 1.64 | g | ||||||||
2008 | 0.05 | 0.12 | 0.02 | 0.32 | 0.41 | 0.46 | 1.89 | 1.30 | 0.29 | 1.65 | 0.08 | 0.04 | 1.89 | |||||||||||||
2009 | 0.00 | 0.54 | 1.90 | 1.09 | 0.92 | 0.30 | d | 0.15 | f | 0.25 | 0.61 | 0.90 | d | 0.56 | 0.18 | b | 1.90 | p | ||||||||
2010 | 0.36 | 0.15 | 0.80 | 0.40 | 0.40 | 0.35 | 1.75 | 1.97 | 0.45 | 0.00 | b | 0.04 | 0.05 | 1.97 | b | |||||||||||
2011 | 0.05 | g | 0.15 | 0.20 | c | 0.14 | c | 1.02 | b | 2.04 | c | 0.20 | 0.87 | 0.46 | 0.12 | 0.47 | 0.11 | c | 2.04 | u | ||||||
2012 | 0.00 | 0.21 | 0.14 | b | 0.36 | d | 0.12 | c | 1.64 | f | 0.36 | 0.19 | f | 0.75 | c | 0.16 | d | 0.00 | 0.25 | b | ----- | z | ||||
2013 | 0.02 | 0.03 | 0.04 | 0.10 | 0.10 | 1.70 | 0.60 | 0.56 | 0.92 | 0.33 | 0.22 | 0.00 | 1.70 | |||||||||||||
2014 | 0.07 | 0.20 | 0.06 | 0.36 | 0.09 | 1.64 | 1.35 | 0.39 | 0.40 | 0.64 | 0.15 | 0.68 | 1.64 | |||||||||||||
2015 | 0.12 | 0.24 | 0.05 | 0.55 | 1.24 | 1.59 | 0.53 | 1.28 | 1.03 | 0.72 | 0.30 | 0.15 | 1.59 | |||||||||||||
2016 | 0.10 | b | 0.17 | 0.09 | 2.95 | a | 0.41 | 1.73 | 0.32 | 0.58 | a | 1.34 | 0.00 | 0.65 | 0.43 | 2.95 | d | |||||||||
2017 | 0.89 | 0.05 | 0.32 | 0.74 | 1.68 | 0.50 | 1.70 | a | 0.98 | 1.35 | 0.05 | 0.01 | 0.00 | 1.70 | a | |||||||||||
2018 | 0.13 | 0.03 | 0.21 | 0.39 | 0.10 | 0.35 | 2.12 | a | 0.28 | 0.13 | 1.26 | 0.25 | 0.00 | 2.12 | a | |||||||||||
2019 | 0.27 | 0.36 | a | 0.36 | 0.20 | 0.29 | 0.65 | 0.76 | 1.69 | 1.35 | 0.18 | 0.19 | 0.17 | 1.69 | a | |||||||||||
2020 | 0.12 | 0.20 | 0.00 | 0.20 | 1.06 | 0.53 | 1.15 | 0.68 | 0.23 | 0.09 | 0.26 | 0.06 | 1.15 | |||||||||||||
2021 | 0.12 | 0.02 | b | 0.76 | 0.05 | 1.41 | b | 2.59 | 0.69 | 0.50 | 0.75 | 0.29 | 0.09 | 0.00 | 2.59 | d | ||||||||||
2022 | 0.06 | b | 0.06 | 0.49 | 0.08 | 0.50 | 2.14 | 1.71 | 1.69 | 0.60 | 0.02 | 0.02 | 0.03 | 2.14 | b | |||||||||||
2023 | 0.27 | 0.07 | 0.02 | 0.58 | 1.15 | 2.31 | 1.01 | 0.70 | 0.32 | 0.19 | 0.01 | a | 0.21 | c | 2.31 | d | ||||||||||
2024 | 0.19 | 0.31 | c | 0.15 | 0.04 | 0.00 | u | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.18 | 0.17 | 0.32 | 0.51 | 0.89 | 0.85 | 0.98 | 0.94 | 0.60 | 0.47 | 0.25 | 0.18 | 1.82 | |||||||||||||
S.D. | 0.22 | 0.21 | 0.35 | 0.47 | 0.68 | 0.66 | 0.76 | 0.64 | 0.57 | 0.50 | 0.31 | 0.30 | 0.66 | |||||||||||||
SKEW | 2.60 | 2.44 | 1.94 | 2.25 | 1.44 | 1.10 | 1.59 | 0.78 | 2.33 | 1.78 | 2.11 | 3.91 | 0.74 | |||||||||||||
MAX | 1.22 | 1.26 | 1.90 | 2.95 | 3.75 | 2.90 | 4.13 | 2.86 | 3.20 | 2.63 | 1.69 | 2.00 | 3.75 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.12 | 0.02 | 0.00 | 0.00 | 0.00 | 0.00 | 0.72 | |||||||||||||
YRS | 76 | 78 | 78 | 83 | 77 | 77 | 78 | 80 | 82 | 82 | 79 | 81 | 50 |