YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.97 | p | 1.17 | 0.20 | 0.43 | 1.09 | 0.46 | 3.35 | g | |||||
1949 | 1.29 | 0.64 | 0.58 | 0.13 | 0.77 | 1.18 | 3.03 | 0.79 | 0.22 | 2.11 | 0.05 | 0.28 | 11.07 | |||||||||||||
1950 | 0.56 | 0.44 | 0.88 | 1.46 | 1.01 | 2.91 | 0.54 | 1.93 | 2.83 | 0.88 | 0.39 | 0.33 | 14.16 | |||||||||||||
1951 | 0.51 | 0.81 | 0.13 | 0.97 | 1.35 | 1.65 | 1.97 | 1.29 | 2.22 | 0.93 | 0.24 | 0.51 | 12.58 | |||||||||||||
1952 | 0.23 | a | 0.47 | 0.70 | 0.00 | 1.24 | 1.52 | 3.56 | 1.55 | 0.77 | 0.12 | 0.43 | 0.02 | 10.61 | ||||||||||||
1953 | 0.28 | 0.17 | 1.28 | 2.47 | 3.95 | a | 2.75 | 1.16 | 2.21 | 0.80 | 1.64 | 0.20 | 0.32 | 17.23 | ||||||||||||
1954 | 0.20 | 0.58 | 1.58 | 0.54 | 1.44 | 5.02 | 1.09 | 3.81 | 1.90 | 0.62 | 0.09 | 0.11 | 16.98 | |||||||||||||
1955 | 0.36 | 0.46 | 0.15 | 2.61 | 2.01 | 3.08 | 1.77 | 0.26 | 0.16 | 0.23 | 0.98 | 0.15 | 12.22 | |||||||||||||
1956 | 0.19 | 0.08 | 0.54 | 0.14 | 2.40 | 0.65 | 3.28 | 0.84 | 0.48 | 0.32 | 0.43 | 0.20 | 9.55 | |||||||||||||
1957 | 0.58 | 0.22 | 0.73 | 2.61 | 1.55 | 7.33 | 1.06 | 1.49 | 2.62 | 1.33 | 0.87 | 0.12 | 20.51 | |||||||||||||
1958 | 0.10 | 0.79 | 0.25 | 0.62 | 0.65 | 3.39 | 2.61 | 0.43 | 0.11 | 0.82 | 1.62 | 0.40 | 11.79 | |||||||||||||
1959 | 0.76 | 1.21 | 0.26 | 0.51 | 1.65 | 2.82 | 0.57 | 0.61 | 3.47 | 0.89 | 0.80 | 0.02 | 13.57 | |||||||||||||
1960 | 0.32 | 0.15 | 0.57 | 0.17 | 2.61 | 7.14 | 1.77 | 2.55 | 0.00 | 0.04 | 0.15 | 0.63 | 16.10 | |||||||||||||
1961 | 0.00 | 0.68 | 0.58 | 2.05 | 1.08 | 3.12 | 2.03 | 0.56 | 2.87 | 0.12 | 0.00 | 0.06 | 13.15 | |||||||||||||
1962 | 0.27 | 0.05 | 1.06 | 0.94 | 4.25 | 1.58 | 4.52 | 1.42 | 0.77 | 1.07 | 0.20 | 0.16 | 16.29 | |||||||||||||
1963 | 0.53 | 0.39 | 1.61 | 2.88 | 2.49 | 6.30 | 1.22 | 1.21 | 0.41 | 0.05 | 0.00 | 0.06 | 17.15 | |||||||||||||
1964 | 0.30 | 0.13 | 0.09 | 0.87 | 2.66 | 4.44 | 1.88 | 3.15 | 0.55 | 0.15 | 1.10 | 0.62 | 15.94 | |||||||||||||
1965 | 0.49 | 0.32 | 0.26 | 1.56 | 3.57 | 3.28 | 2.99 | 2.18 | 1.09 | 0.00 | 0.39 | 0.15 | 16.28 | |||||||||||||
1966 | 0.90 | 0.39 | 0.76 | 0.86 | 1.68 | 2.99 | 2.40 | 2.05 | 0.84 | 0.40 | 0.62 | 0.13 | 14.02 | |||||||||||||
1967 | 0.96 | 0.66 | 0.35 | 3.90 | 2.34 | 2.01 | 0.64 | 0.15 | 2.12 | 0.65 | 0.13 | 0.25 | 14.16 | |||||||||||||
1968 | 0.78 | 0.27 | 0.07 | 1.07 | 1.25 | 4.75 | 3.37 | 4.39 | 0.79 | 0.81 | 0.03 | 1.22 | 18.80 | |||||||||||||
1969 | 0.60 | 0.40 | 0.18 | 1.17 | 1.77 | 6.17 | 2.43 | 0.62 | 0.25 | 0.92 | 0.00 | 0.97 | 15.48 | |||||||||||||
1970 | 0.55 | 0.05 | 0.37 | 3.05 | 5.47 | 4.89 | 2.85 | 0.00 | 1.71 | 0.47 | 0.99 | 0.11 | 20.51 | |||||||||||||
1971 | 1.09 | 0.46 | 0.33 | 2.35 | 1.02 | 8.51 | b | 0.48 | 0.05 | 4.64 | 3.02 | 0.43 | 0.58 | 22.96 | ||||||||||||
1972 | ----- | z | ----- | z | 0.83 | 0.80 | 4.65 | 2.31 | 1.92 | 3.03 | 0.89 | 1.20 | 0.05 | 1.38 | 17.06 | b | ||||||||||
1973 | 0.20 | 0.73 | 0.63 | 2.52 | 1.23 | 2.62 | 0.92 | 0.64 | 2.36 | 0.09 | 0.63 | 0.33 | o | 12.57 | a | |||||||||||
1974 | 0.10 | 0.45 | 0.51 | 1.20 | 6.84 | 0.56 | 2.08 | 1.14 | 0.34 | 0.87 | 0.84 | 0.15 | 15.08 | |||||||||||||
1975 | 0.06 | 0.25 | 1.49 | a | 2.33 | 2.17 | 3.99 | 0.71 | 0.32 | 0.83 | 0.92 | 0.48 | 0.86 | 14.41 | ||||||||||||
1976 | 0.79 | 0.12 | 0.21 | 1.75 | 1.60 | 3.15 | 2.00 | 0.23 | 0.29 | 0.61 | 0.17 | 0.26 | 11.18 | |||||||||||||
1977 | 0.54 | 0.19 | 0.81 | 0.08 | 2.62 | 3.61 | 0.91 | 2.07 | 5.46 | 1.13 | 0.98 | 0.77 | 19.17 | |||||||||||||
1978 | 0.13 | 0.68 | 0.23 | 1.24 | 5.01 | 2.89 | 3.03 | 1.51 | 1.71 | 0.24 | 1.18 | 0.35 | 18.20 | |||||||||||||
1979 | 0.13 | 0.68 | 0.25 | 1.01 | 0.90 | a | 1.14 | 2.58 | 1.01 | 1.07 | 0.49 | 0.46 | 0.05 | 9.77 | ||||||||||||
1980 | 0.54 | 0.24 | a | 0.12 | 0.00 | 0.27 | 2.11 | 0.93 | 2.83 | 1.01 | 2.41 | 0.45 | 0.32 | 11.23 | ||||||||||||
1981 | 0.08 | 0.01 | 0.03 | 1.20 | 1.79 | 3.81 | 1.25 | 2.55 | 0.48 | 0.23 | 0.54 | 0.50 | 12.47 | |||||||||||||
1982 | 0.64 | 0.24 | 2.09 | 1.33 | 4.05 | 3.48 | 1.37 | 1.69 | 1.97 | 4.48 | 0.06 | 0.66 | 22.06 | |||||||||||||
1983 | 0.13 | 0.05 | 1.04 | 0.25 | 2.10 | 2.98 | 2.18 | 1.83 | 1.34 | 0.27 | 0.64 | 0.25 | 13.06 | |||||||||||||
1984 | 0.34 | 0.04 | 0.61 | 1.34 | 0.10 | 2.40 | 0.43 | 2.44 | 0.69 | 0.57 | 0.11 | 0.31 | 9.38 | |||||||||||||
1985 | 0.03 | 0.01 | 0.72 | 1.39 | 2.41 | 0.40 | 2.85 | 0.93 | 1.57 | 1.58 | 0.57 | 0.59 | 13.05 | |||||||||||||
1986 | 0.27 | 0.54 | 0.14 | 2.63 | 2.64 | 4.30 | 2.48 | 0.08 | 6.05 | 0.69 | 1.16 | 0.08 | 21.06 | |||||||||||||
1987 | 0.13 | 0.23 | 1.85 | 0.05 | 2.60 | 0.91 | 7.54 | 4.08 | 0.56 | 0.30 | 0.18 | 0.00 | 18.43 | |||||||||||||
1988 | 0.67 | 0.58 | 0.55 | 0.00 | 2.26 | 1.49 | 1.23 | 0.16 | 1.04 | 0.53 | 0.29 | 0.45 | 9.25 | |||||||||||||
1989 | 0.65 | 0.27 | 1.15 | 2.90 | 1.82 | 1.81 | 0.39 | 0.87 | 0.35 | 1.82 | 0.56 | 0.62 | 13.21 | |||||||||||||
1990 | 0.19 | 0.07 | 0.31 | 1.03 | 1.52 | 3.67 | 2.10 | 0.15 | 0.35 | 1.09 | 0.16 | 0.24 | 10.88 | |||||||||||||
1991 | 0.11 | 0.31 | 0.22 | 2.64 | 2.12 | 3.46 | 0.41 | 0.33 | 2.73 | 0.74 | 0.10 | 0.02 | 13.19 | |||||||||||||
1992 | 0.38 | 0.05 | 0.77 | 2.60 | 1.31 | 1.22 | 1.76 | 2.37 | 0.78 | 0.10 | 0.76 | 0.56 | 12.66 | |||||||||||||
1993 | 0.26 | 0.41 | 0.23 | 2.49 | 2.84 | 4.63 | 6.64 | 1.43 | 0.23 | 0.33 | 0.53 | 0.27 | 20.29 | |||||||||||||
1994 | 0.39 | a | 0.34 | 0.50 | 0.98 | 0.95 | 7.02 | 0.97 | 0.12 | 0.60 | 2.79 | 0.22 | 0.16 | 15.04 | ||||||||||||
1995 | 0.70 | 0.18 | 0.95 | 0.67 | 3.07 | 2.39 | 3.22 | 1.51 | 0.03 | 1.35 | b | 0.41 | 0.27 | 14.75 | ||||||||||||
1996 | 0.52 | a | 0.32 | 0.85 | a | 1.01 | 2.68 | 4.51 | 1.62 | 1.76 | 2.26 | 0.69 | 0.92 | a | 0.24 | 17.38 | ||||||||||
1997 | 0.17 | 0.44 | 0.74 | u | 2.56 | 0.46 | 1.81 | 7.02 | 1.33 | 0.91 | 0.93 | 0.04 | a | 0.02 | 15.69 | a | ||||||||||
1998 | 0.15 | a | 1.39 | 0.51 | 0.59 | 2.46 | 3.51 | a | 1.44 | 2.00 | 0.64 | 3.23 | 0.85 | 0.39 | 17.16 | |||||||||||
1999 | 0.47 | 0.52 | 0.14 | 1.13 | 3.19 | 1.37 | 0.81 | 2.51 | 1.49 | 0.60 | 0.50 | 0.15 | a | 12.88 | ||||||||||||
2000 | 0.02 | 0.44 | 0.19 | 0.46 | 1.63 | 1.23 | 3.46 | d | 0.47 | 0.93 | d | 0.69 | b | 3.29 | c | 0.25 | h | 12.81 | a | |||||||
2001 | 0.27 | a | 0.09 | 0.25 | 2.00 | b | 0.44 | a | 4.48 | d | 3.42 | e | 0.14 | 1.20 | ----- | z | ----- | z | 0.41 | h | 12.29 | c | ||||
2002 | 0.17 | 0.31 | j | 1.03 | g | 1.40 | e | 1.03 | h | 2.49 | 2.88 | c | 0.19 | a | 0.00 | 0.54 | 0.16 | 0.10 | 7.93 | c | ||||||
2003 | 0.47 | 0.01 | 0.20 | g | 0.72 | 3.40 | 2.71 | 0.95 | 0.49 | 2.55 | 0.29 | ----- | z | ----- | z | 11.59 | c | |||||||||
2004 | ----- | z | ----- | z | ----- | z | 0.60 | o | 0.67 | a | ----- | z | 4.62 | y | 0.34 | b | 1.78 | 2.25 | 0.00 | 0.03 | d | 5.07 | f | |||
2005 | ----- | z | 0.00 | 0.43 | 0.33 | ----- | z | 3.28 | e | 0.60 | a | 1.35 | 0.55 | 0.59 | 0.84 | 0.23 | a | 8.20 | b | |||||||
2006 | 0.42 | ----- | z | 0.55 | t | 3.55 | 2.99 | 0.76 | 0.18 | 1.11 | 2.02 | 1.70 | 0.08 | 0.15 | 12.96 | b | ||||||||||
2007 | 0.08 | 0.74 | 2.34 | 1.67 | 5.53 | 1.35 | 2.19 | 0.53 | 0.81 | 0.33 | 0.07 | 0.05 | 15.69 | |||||||||||||
2008 | 0.10 | 0.73 | 0.21 | 0.44 | 3.06 | 1.53 | 1.26 | 1.85 | 1.26 | 1.95 | 0.96 | 0.85 | 14.20 | |||||||||||||
2009 | 1.30 | a | 0.89 | 1.28 | 0.92 | 2.30 | 3.06 | 3.12 | 0.96 | 0.88 | 1.81 | 0.00 | a | 1.19 | 17.71 | |||||||||||
2010 | 0.40 | 0.53 | 0.53 | 0.87 | 4.16 | a | 4.62 | 1.82 | 0.60 | 2.88 | 0.16 | 2.38 | 0.63 | 19.58 | ||||||||||||
2011 | 1.58 | 0.67 | 0.60 | 0.95 | d | 6.14 | q | 3.24 | n | 3.89 | g | 1.79 | o | 1.02 | y | 0.42 | n | ----- | z | 0.26 | u | 3.80 | h | |||
2012 | 0.12 | 0.33 | 0.08 | 1.56 | t | 1.89 | b | 1.48 | 3.30 | u | 1.13 | ----- | z | 1.54 | 0.54 | 1.05 | 8.16 | c | ||||||||
2013 | 0.32 | a | 0.41 | 0.55 | 1.99 | 6.79 | b | 3.32 | 1.70 | d | 2.20 | h | 2.04 | e | 1.10 | r | 0.34 | 2.85 | 20.31 | b | ||||||
2014 | 0.33 | 0.25 | 1.32 | 1.82 | 3.17 | d | 3.18 | b | 2.28 | a | 7.39 | d | 1.24 | a | 0.84 | 0.75 | a | 0.37 | 22.94 | |||||||
2015 | 0.35 | 0.28 | 0.49 | 0.60 | 1.22 | a | 3.40 | d | 0.71 | 1.46 | e | 2.16 | b | 1.26 | 0.21 | a | 0.34 | c | 12.48 | |||||||
2016 | 0.22 | a | 0.51 | b | 0.46 | a | 3.00 | b | 1.50 | 2.56 | k | 1.97 | d | 1.35 | i | 3.08 | e | 0.98 | 0.42 | c | 1.18 | 13.32 | b | |||
2017 | 0.32 | c | 0.39 | 0.24 | b | 0.78 | 1.39 | a | 1.00 | 0.85 | 1.95 | a | 2.07 | a | 0.35 | 0.30 | 0.53 | a | 10.17 | |||||||
2018 | 0.23 | 0.59 | 1.42 | 1.13 | 1.08 | S | 5.95 | a | 2.92 | b | 0.69 | 1.18 | 0.46 | 1.26 | 0.32 | a | 17.23 | |||||||||
2019 | 0.44 | 0.80 | 0.19 | 1.26 | 3.52 | 2.75 | 4.06 | 1.36 | 6.13 | 1.40 | 0.76 | 0.45 | 23.12 | |||||||||||||
2020 | 0.54 | a | 0.41 | 0.26 | c | 0.48 | d | 1.37 | 0.49 | 2.52 | 1.15 | S | 1.11 | a | 1.01 | 0.08 | 0.03 | 9.45 | ||||||||
2021 | 0.09 | c | 0.10 | a | 0.03 | 0.24 | 3.41 | 1.21 | 0.32 | d | 2.76 | b | 0.47 | a | 2.13 | 0.31 | S | 0.55 | b | 11.62 | ||||||
2022 | 0.09 | 0.53 | 0.38 | 3.43 | h | 3.60 | b | 3.52 | 2.66 | S | 1.03 | d | 0.20 | a | 1.12 | q | ----- | z | ----- | z | 12.01 | d | ||||
2023 | ----- | z | ----- | z | ----- | z | 0.17 | 2.26 | 8.29 | ----- | z | ----- | z | 0.40 | m | 0.93 | d | 0.02 | a | 0.07 | 11.74 | f | ||||
2024 | 0.04 | a | 0.05 | e | 0.12 | j | 0.12 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.09 | j |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.40 | 0.39 | 0.61 | 1.33 | 2.35 | 3.13 | 2.08 | 1.42 | 1.43 | 0.97 | 0.53 | 0.41 | 15.09 | |||||||||||||
S.D. | 0.32 | 0.28 | 0.51 | 0.96 | 1.43 | 1.86 | 1.47 | 1.23 | 1.33 | 0.84 | 0.55 | 0.44 | 3.76 | |||||||||||||
SKEW | 1.44 | 0.90 | 1.36 | 0.63 | 1.10 | 0.93 | 1.61 | 1.97 | 1.75 | 1.68 | 2.41 | 2.84 | 0.41 | |||||||||||||
MAX | 1.58 | 1.39 | 2.34 | 3.90 | 6.84 | 8.51 | 7.54 | 7.39 | 6.13 | 4.48 | 3.29 | 2.85 | 23.12 | |||||||||||||
MIN | 0.00 | 0.00 | 0.03 | 0.00 | 0.10 | 0.40 | 0.18 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 9.25 | |||||||||||||
YRS | 72 | 71 | 69 | 72 | 72 | 72 | 71 | 72 | 73 | 72 | 72 | 70 | 59 |