YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 0.77 | 1.23 | 0.17 | 0.42 | 1.27 | 0.70 | 1.84 | 2.19 | 0.00 | 0.82 | 0.00 | 0.20 | 9.61 | |||||||||||||
1949 | 0.72 | 0.53 | 0.10 | 0.72 | 1.79 | 2.82 | 3.97 | 0.85 | 3.99 | 0.65 | 0.05 | ----- | z | 16.19 | a | |||||||||||
1950 | 0.00 | 0.20 | 0.00 | 0.00 | 0.42 | 2.03 | 3.17 | 0.00 | 2.54 | 0.87 | 0.00 | 0.00 | 9.23 | |||||||||||||
1951 | 0.33 | 0.62 | 0.18 | 0.00 | a | 0.68 | 0.00 | a | 1.91 | 1.42 | 0.28 | 0.57 | 0.25 | 0.40 | 6.64 | |||||||||||
1952 | 0.14 | 0.20 | 0.04 | 1.15 | 0.00 | 0.02 | 3.70 | 3.29 | 0.92 | 0.00 | 0.94 | 0.20 | 10.60 | |||||||||||||
1953 | 0.26 | 0.15 | 0.33 | 0.35 | 0.94 | 0.00 | 5.03 | 2.05 | 0.00 | 0.53 | 0.52 | 0.28 | 10.44 | |||||||||||||
1954 | 0.09 | 0.08 | 0.00 | 1.14 | 0.44 | 0.18 | 0.44 | 2.02 | 0.79 | 7.86 | a | 0.00 | 0.00 | 13.04 | ||||||||||||
1955 | 0.22 | 0.06 | 0.07 | 0.57 | 0.37 | 0.00 | 2.91 | 0.46 | 1.94 | 0.92 | 0.00 | 0.00 | 7.52 | |||||||||||||
1956 | 0.05 | 0.32 | 0.00 | 0.12 | 0.99 | a | 0.72 | 0.96 | 1.64 | 0.00 | 0.21 | 0.06 | 0.00 | 5.07 | ||||||||||||
1957 | 0.00 | 0.61 | 1.24 | 0.65 | 0.51 | 0.65 | 1.77 | 1.28 | 0.11 | 1.98 | a | 0.25 | 0.00 | 9.05 | ||||||||||||
1958 | 1.63 | 0.00 | 2.37 | 0.70 | 1.11 | 0.91 | 2.47 | 3.19 | 5.34 | 0.91 | 0.00 | 0.10 | 18.73 | |||||||||||||
1959 | 0.00 | 0.00 | 0.03 | 0.78 | 1.88 | 1.28 | 1.28 | 4.87 | 0.07 | 1.43 | 0.00 | 1.28 | 12.90 | |||||||||||||
1960 | 0.99 | 0.22 | 0.33 | 0.00 | 0.60 | 2.65 | 9.90 | 1.58 | 1.87 | 5.01 | 0.00 | 1.54 | 24.69 | |||||||||||||
1961 | 0.47 | 0.05 | 0.90 | 1.19 | 0.34 | 0.59 | 2.03 | 2.74 | 2.67 | 1.55 | 1.01 | 0.65 | 14.19 | |||||||||||||
1962 | 0.44 | 0.15 | 0.21 | 0.43 | 0.10 | 3.12 | 5.87 | 0.15 | 3.19 | 0.25 | 1.25 | 0.61 | 15.77 | |||||||||||||
1963 | 0.06 | 0.90 | 0.00 | 0.35 | 1.02 | 4.26 | 0.49 | 3.08 | 0.46 | 0.73 | 0.12 | 0.20 | 11.67 | |||||||||||||
1964 | 0.10 | 0.24 | 0.00 | 0.00 | 0.38 | 0.05 | 0.86 | 2.39 | 1.28 | 0.00 | 1.57 | 0.22 | 7.09 | |||||||||||||
1965 | 0.00 | 0.65 | 0.64 | 0.68 | 3.11 | 0.52 | 1.71 | 1.53 | 1.19 | 0.47 | 0.00 | 0.74 | 11.24 | |||||||||||||
1966 | 0.48 | 0.00 | 0.00 | 0.26 | 1.36 | 3.12 | 1.00 | 8.47 | 1.01 | 0.00 | 0.29 | 0.00 | 15.99 | |||||||||||||
1967 | 0.00 | 0.19 | 0.10 | 0.00 | 0.40 | 2.39 | 1.69 | 5.68 | 0.12 | 0.06 | 0.28 | 0.71 | 11.62 | |||||||||||||
1968 | 0.68 | 0.40 | 1.12 | 0.45 | 0.83 | 0.00 | 4.81 | 3.03 | 0.00 | 1.60 | 0.49 | 0.00 | 13.41 | |||||||||||||
1969 | 0.00 | 0.93 | 0.88 | 1.29 | 2.12 | 1.84 | 2.37 | 3.37 | 5.27 | 4.09 | 0.00 | 0.90 | 23.06 | |||||||||||||
1970 | 0.00 | 0.10 | 0.30 | 1.10 | 0.11 | 1.93 | 3.06 | 1.28 | 8.34 | 0.78 | 0.00 | 0.00 | 17.00 | |||||||||||||
1971 | 0.30 | 0.25 | 0.02 | 0.00 | 0.18 | 0.28 | 1.09 | 3.78 | 1.81 | 1.69 | 0.85 | 0.84 | 11.09 | |||||||||||||
1972 | 0.04 | 0.00 | 0.00 | 0.00 | 1.40 | 4.25 | 3.16 | 5.05 | 2.03 | 2.24 | 0.81 | 0.10 | 19.08 | |||||||||||||
1973 | 0.62 | 0.65 | 1.77 | 0.54 | 1.99 | 0.23 | 6.24 | 0.20 | 0.80 | 0.82 | 0.00 | 0.08 | 13.94 | |||||||||||||
1974 | 0.37 | 0.12 | 0.10 | 0.00 | 0.00 | 0.15 | 0.63 | 2.41 | 3.16 | 4.88 | 0.45 | 0.85 | 13.12 | |||||||||||||
1975 | 0.27 | 0.68 | 0.51 | 0.50 | 0.25 | 0.25 | 2.63 | 0.44 | 2.41 | 0.00 | 0.70 | 0.21 | 8.85 | |||||||||||||
1976 | 0.08 | 0.10 | 0.00 | 1.08 | 1.93 | 0.98 | 5.55 | 0.63 | 1.52 | 0.64 | 0.38 | 0.00 | 12.89 | |||||||||||||
1977 | 0.19 | 0.71 | 0.72 | 2.52 | 1.80 | 0.83 | 1.57 | 2.98 | 0.93 | 1.78 | 0.67 | 0.06 | 14.76 | |||||||||||||
1978 | 0.97 | 0.70 | 0.10 | 0.30 | 2.19 | 6.55 | 1.19 | 1.65 | 1.70 | 1.27 | 1.50 | 0.83 | 18.95 | |||||||||||||
1979 | 0.67 | 0.28 | 0.21 | 0.99 | 0.93 | 2.97 | 1.25 | 1.75 | 0.97 | 0.18 | 0.33 | 0.36 | 10.89 | |||||||||||||
1980 | 0.00 | 0.78 | 0.35 | 0.18 | 1.32 | 0.12 | 0.17 | 1.74 | 4.51 | 0.09 | 0.51 | 0.29 | 10.06 | |||||||||||||
1981 | 0.29 | 0.09 | 0.51 | 0.55 | 1.90 | 1.88 | 4.07 | 6.12 | 1.31 | 1.85 | 0.20 | 0.00 | 18.77 | |||||||||||||
1982 | 0.53 | 0.36 | 0.25 | 0.04 | 0.59 | 0.55 | 5.29 | 1.86 | 2.90 | 0.28 | 1.23 | 1.53 | 15.41 | |||||||||||||
1983 | 1.07 | 0.34 | 0.56 | 0.23 | 0.79 | 0.45 | 0.65 | ----- | z | 1.41 | 2.26 | 1.54 | 0.50 | 9.80 | a | |||||||||||
1984 | 0.08 | 0.06 | 0.11 | 0.19 | 1.86 | 2.97 | 2.72 | 3.24 | 0.56 | 2.27 | 2.09 | 1.07 | 17.22 | |||||||||||||
1985 | 0.52 | 0.00 | 2.00 | 1.10 | 2.54 | 0.98 | 1.84 | 1.39 | 2.47 | 3.29 | 0.54 | 0.10 | 16.77 | |||||||||||||
1986 | 0.10 | 0.94 | 0.19 | 0.03 | 1.62 | 2.64 | 0.20 | 8.02 | 1.76 | 3.33 | 2.33 | x | 2.04 | 20.87 | a | |||||||||||
1987 | 1.03 | 1.50 | 0.54 | 0.21 | 3.18 | 1.24 | 0.70 | a | 2.33 | 1.69 | 0.82 | 0.56 | 0.30 | 14.10 | ||||||||||||
1988 | 0.18 | 0.13 | 0.04 | 1.22 | 1.69 | 2.27 | 1.92 | 2.99 | 2.46 | 0.30 | b | 0.18 | 0.35 | a | 13.73 | |||||||||||
1989 | 0.11 | 0.55 | 0.29 | 0.45 | 1.36 | 1.89 | 0.64 | 5.43 | 0.52 | 0.21 | 0.00 | 0.31 | 11.76 | |||||||||||||
1990 | 0.73 | 0.63 | 0.26 | 1.46 | 0.33 | 0.60 | 3.98 | 4.83 | 0.97 | 0.23 | 0.83 | 0.26 | 15.11 | |||||||||||||
1991 | 0.33 | 0.02 | 0.00 | 0.00 | 1.18 | 0.52 | 6.30 | 11.92 | 6.26 | 0.28 | 1.22 | 2.07 | 30.10 | |||||||||||||
1992 | 0.66 | 0.12 | 0.28 | 0.78 | 3.19 | 1.73 | 2.30 | 4.01 | 0.87 | 0.11 | 0.22 | 0.56 | 14.83 | |||||||||||||
1993 | 0.96 | 0.52 | e | 0.85 | 0.00 | 1.12 | 1.45 | 1.77 | a | 2.89 | 2.63 | 1.47 | 0.53 | 0.20 | 14.39 | |||||||||||
1994 | 0.00 | 0.00 | 1.22 | 0.13 | 2.85 | 0.39 | 1.87 | 1.35 | 0.54 | 0.82 | 0.64 | 0.52 | 10.33 | |||||||||||||
1995 | 0.18 | 0.00 | 0.60 | 0.04 | 1.55 | 1.93 | 0.67 | 2.93 | 2.16 | 0.33 | 0.10 | 0.30 | 10.79 | |||||||||||||
1996 | 0.06 | 0.32 | 0.00 | 0.00 | 0.00 | 2.78 | 2.53 | 1.50 | 1.93 | 2.94 | 0.11 | 0.00 | 12.17 | |||||||||||||
1997 | 0.49 | 1.14 | 0.00 | 4.42 | 0.71 | 3.58 | 4.54 | 4.34 | 2.33 | 0.40 | 1.00 | 2.76 | 25.71 | |||||||||||||
1998 | 0.00 | a | 0.57 | 1.30 | 1.71 | 0.20 | 0.32 | 1.94 | 4.60 | 1.00 | 5.84 | 0.29 | 0.45 | 18.22 | ||||||||||||
1999 | 1.48 | 0.00 | 1.49 | 5.94 | 4.16 | 2.15 | 2.06 | 3.39 | 0.89 | 0.30 | 0.00 | 0.33 | 22.19 | |||||||||||||
2000 | 0.00 | 0.00 | 1.35 | 0.36 | 0.50 | 2.58 | 1.03 | 0.11 | 0.01 | 6.36 | 0.70 | 0.58 | 13.58 | |||||||||||||
2001 | 0.84 | 0.51 | 1.39 | 0.00 | 0.36 | 1.43 | 0.24 | 1.94 | 0.30 | 0.53 | 1.83 | 0.08 | 9.45 | |||||||||||||
2002 | 0.25 | 0.01 | 1.44 | 0.54 | 0.00 | 2.70 | 2.56 | 2.45 | 5.00 | 1.72 | 0.07 | 1.01 | 17.75 | |||||||||||||
2003 | 0.00 | 0.27 | 0.15 | 0.00 | 0.12 | 2.49 | 0.00 | 0.43 | 0.85 | 2.37 | 0.42 | 0.00 | 7.10 | |||||||||||||
2004 | 0.12 | 1.47 | 0.59 | 3.23 | 0.10 | 1.02 | 0.64 | 3.56 | 1.03 | 2.69 | 1.72 | 0.50 | 16.67 | |||||||||||||
2005 | 1.08 | 1.35 | 1.23 | 0.46 | 2.52 | 0.59 | 1.28 | 2.73 | 3.29 | 0.71 | 0.00 | 0.00 | 15.24 | |||||||||||||
2006 | 0.02 | 0.02 | 0.03 | 0.42 | 0.19 | 1.29 | 2.69 | 4.96 | 2.34 | 1.22 | 0.01 | 0.90 | 14.09 | |||||||||||||
2007 | 0.85 | 0.12 | 2.06 | 0.57 | 2.05 | 1.46 | 1.04 | 0.48 | 1.14 | 0.02 | 0.10 | 0.59 | 10.48 | |||||||||||||
2008 | 0.02 | 0.11 | 0.08 | 0.16 | 1.01 | 0.46 | 6.31 | 2.00 | a | 0.13 | 2.21 | 1.00 | 0.02 | 13.51 | ||||||||||||
2009 | 0.00 | 0.06 | 0.36 | 0.30 | 0.44 | 2.73 | 2.31 | 0.95 | c | 2.22 | a | 1.04 | 0.27 | 0.63 | 11.31 | |||||||||||
2010 | 0.66 | 1.22 | 1.69 | 1.36 | 0.86 | 0.94 | 1.52 | 4.74 | 1.19 | 0.76 | 0.02 | 0.11 | 15.07 | |||||||||||||
2011 | 0.00 | 0.14 | 0.05 | 0.00 | 0.00 | 0.07 | 3.01 | 0.23 | 1.32 | 1.38 | 0.08 | 1.54 | 7.82 | |||||||||||||
2012 | 0.00 | 0.18 | 0.07 | 0.00 | 0.20 | 0.12 | 0.89 | 2.23 | 0.89 | 0.31 | 0.02 | 0.12 | 5.03 | |||||||||||||
2013 | 0.37 | 0.22 | 0.00 | 0.00 | 0.02 | 1.41 | 3.30 | 1.78 | 4.95 | 0.37 | 0.20 | 0.20 | 12.82 | |||||||||||||
2014 | 0.00 | 0.04 | 0.25 | 0.00 | b | 1.77 | 0.37 | 6.59 | 1.90 | 1.25 | 0.48 | 0.19 | 0.08 | 12.92 | ||||||||||||
2015 | 1.26 | 0.68 | 0.55 | 0.03 | 4.50 | 1.44 | 6.91 | 2.18 | 0.75 | 3.08 | 0.36 | 0.71 | 22.45 | |||||||||||||
2016 | 0.10 | 0.18 | a | 0.00 | 1.01 | 0.48 | 0.96 | 1.04 | 1.96 | 2.83 | ----- | z | ----- | z | ----- | z | 8.56 | c | ||||||||
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
2019 | ----- | z | ----- | z | ----- | z | 1.31 | j | 0.32 | r | 1.20 | 5.73 | 0.85 | 0.84 | 2.36 | 0.65 | 0.02 | 11.65 | e | |||||||
2020 | 0.80 | a | 0.13 | a | 1.66 | 0.48 | 0.29 | 0.04 | a | 1.60 | a | 0.40 | 0.85 | a | 0.65 | 0.06 | 0.00 | 6.96 | ||||||||
2021 | 0.13 | 0.01 | 0.18 | 0.27 | 1.19 | 2.46 | 3.62 | 1.69 | 0.99 | 0.46 | 0.00 | 0.00 | 11.00 | |||||||||||||
2022 | 0.10 | 0.06 | 0.08 | 0.00 | 0.34 | 0.97 | 1.46 | 5.28 | 0.29 | 2.11 | a | 0.01 | b | 0.40 | 11.10 | |||||||||||
2023 | 0.40 | a | 0.25 | b | 0.00 | b | 0.02 | 2.41 | 2.24 | 0.31 | 0.91 | 1.27 | 0.98 | 0.06 | 1.15 | 10.00 | ||||||||||
2024 | 0.36 | 0.13 | 0.02 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.51 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.37 | 0.36 | 0.49 | 0.63 | 1.14 | 1.43 | 2.52 | 2.66 | 1.75 | 1.42 | 0.45 | 0.47 | 13.60 | |||||||||||||
S.D. | 0.40 | 0.39 | 0.61 | 0.98 | 1.02 | 1.26 | 1.99 | 2.10 | 1.61 | 1.58 | 0.52 | 0.56 | 4.88 | |||||||||||||
SKEW | 1.14 | 1.31 | 1.33 | 3.33 | 1.14 | 1.25 | 1.25 | 1.72 | 1.68 | 1.96 | 1.31 | 1.83 | 0.91 | |||||||||||||
MAX | 1.63 | 1.50 | 2.37 | 5.94 | 4.50 | 6.55 | 9.90 | 11.92 | 8.34 | 7.86 | 2.09 | 2.76 | 30.10 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 5.03 | |||||||||||||
YRS | 74 | 74 | 74 | 73 | 73 | 74 | 74 | 73 | 74 | 73 | 72 | 72 | 69 |