YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | 0.29 | 0.42 | 0.77 | 0.58 | 1.11 | 5.36 | 2.96 | 1.31 | 0.73 | 0.62 | 0.85 | 0.34 | 15.34 | |||||||||||||
1949 | 1.07 | 0.02 | 1.91 | 1.06 | 4.17 | 5.98 | 0.74 | 2.90 | 0.90 | 0.80 | 0.06 | 0.13 | f | 19.61 | a | |||||||||||
1950 | 0.42 | 0.24 | 0.31 | 1.17 | 3.09 | 1.03 | 2.96 | 1.76 | 5.11 | 0.55 | 0.59 | 0.30 | 17.53 | |||||||||||||
1951 | 0.39 | 0.19 | 0.15 | 2.04 | 1.50 | 5.51 | 2.56 | 1.88 | 2.44 | 2.12 | 0.06 | 0.90 | 19.74 | |||||||||||||
1952 | 0.06 | 0.86 | 0.94 | 1.66 | 4.95 | 2.86 | 0.85 | 2.29 | 1.02 | 0.63 | 1.14 | 0.26 | 17.52 | |||||||||||||
1953 | 0.14 | 1.16 | 0.69 | 3.22 | 0.59 | 4.51 | 4.85 | 1.02 | 0.20 | 1.96 | 1.36 | 0.34 | 20.04 | |||||||||||||
1954 | 0.11 | 0.01 | 0.86 | 0.49 | 1.82 | 1.68 | 3.00 | 2.63 | 1.15 | 0.40 | 0.11 | 0.25 | 12.51 | |||||||||||||
1955 | 0.23 | 0.62 | 0.55 | 1.71 | 3.70 | 3.62 | 0.92 | 3.23 | 0.88 | 0.33 | 0.40 | 0.13 | 16.32 | |||||||||||||
1956 | 0.29 | 0.14 | 0.52 | 1.19 | 1.37 | 1.97 | 4.52 | 1.89 | 0.18 | 0.08 | 1.54 | 0.39 | 14.08 | |||||||||||||
1957 | 0.23 | 0.01 | 1.18 | 2.59 | 5.11 | 2.69 | 5.77 | 1.26 | 0.53 | 1.82 | 0.26 | 0.08 | 21.53 | |||||||||||||
1958 | 0.03 | 0.69 | 1.36 | 2.95 | 1.59 | 2.97 | 4.77 | 2.17 | 1.57 | 0.38 | 0.24 | 1.04 | 19.76 | |||||||||||||
1959 | 0.64 | 0.31 | 2.61 | 0.46 | 4.04 | 1.13 | 0.16 | 1.23 | 2.02 | 1.25 | 0.07 | 0.01 | 13.93 | |||||||||||||
1960 | 0.83 | 0.77 | 0.42 | 0.98 | 3.47 | a | 2.17 | 1.01 | 0.64 | 0.92 | 1.20 | 0.54 | 0.56 | 13.51 | ||||||||||||
1961 | 0.00 | 0.23 | 2.15 | 1.56 | 6.22 | 1.47 | 4.72 | 0.85 | 2.13 | 0.13 | 0.26 | 0.24 | 19.96 | |||||||||||||
1962 | 0.31 | 0.43 | 0.29 | 0.21 | 5.73 | 5.74 | 2.84 | 1.11 | 0.11 | 0.87 | 0.37 | 0.14 | 18.15 | |||||||||||||
1963 | 1.54 | 0.10 | 1.05 | 0.63 | 2.97 | 2.21 | 2.70 | 2.35 | 3.13 | 2.85 | 0.08 | 0.36 | 19.97 | |||||||||||||
1964 | 0.01 | 0.43 | 0.85 | 1.64 | 2.14 | 1.85 | 2.01 | 0.21 | 0.65 | 0.56 | 0.03 | 0.18 | 10.56 | |||||||||||||
1965 | 0.38 | 0.45 | 0.30 | 0.85 | 3.77 | 10.51 | 3.60 | 1.05 | 3.23 | 2.42 | 0.23 | 0.74 | 27.53 | |||||||||||||
1966 | 0.56 | 0.35 | 0.87 | 1.83 | 0.19 | 3.78 | 5.22 | 4.36 | 1.56 | 0.59 | 0.40 | 0.17 | 19.88 | |||||||||||||
1967 | 0.15 | 0.06 | 0.59 | 2.21 | 5.36 | 9.64 | 2.70 | 1.61 | 0.39 | 0.73 | 0.34 | 0.87 | 24.65 | |||||||||||||
1968 | 0.04 | 0.51 | 0.53 | 1.09 | 5.72 | 1.64 | 1.39 | 7.47 | 0.25 | 0.68 | 0.21 | 0.64 | 20.17 | |||||||||||||
1969 | 0.26 | 0.30 | 0.31 | 0.87 | 4.83 | 3.57 | 2.27 | 1.02 | 0.30 | 4.29 | 0.35 | 0.15 | 18.52 | |||||||||||||
1970 | 0.38 | 0.06 | 1.36 | 2.17 | 3.89 | 6.84 | 4.90 | 0.08 | 1.06 | 0.86 | 0.23 | 0.58 | 22.41 | |||||||||||||
1971 | 0.54 | 0.63 | 1.43 | 2.78 | 5.22 | 2.16 | 1.82 | 1.73 | 3.04 | 0.60 | 0.20 | 0.48 | 20.63 | |||||||||||||
1972 | 0.36 | 0.17 | 0.07 | 1.86 | 1.97 | 2.56 | 2.99 | 1.70 | 1.56 | 0.75 | 1.04 | 0.30 | 15.33 | |||||||||||||
1973 | 1.37 | 0.13 | 2.63 | 3.69 | 1.42 | 1.23 | 2.74 | 1.47 | 4.35 | 0.74 | 0.73 | 1.39 | 21.89 | |||||||||||||
1974 | 0.28 | 0.32 | 1.47 | 1.15 | 0.92 | 3.91 | 3.08 | 2.88 | 0.57 | 0.23 | 0.29 | 0.12 | 15.22 | |||||||||||||
1975 | 0.25 | 0.44 | 1.21 | 1.29 | 5.23 | 2.38 | 1.08 | 2.53 | 0.50 | 0.43 | 0.97 | 0.36 | 16.67 | |||||||||||||
1976 | 0.78 | 0.54 | 0.66 | 2.62 | 3.85 | 0.88 | 2.60 | 0.55 | 0.18 | 0.32 | 0.31 | 0.00 | 13.29 | |||||||||||||
1977 | 0.33 | 0.02 | 0.98 | a | 4.43 | 2.87 | 2.06 | 2.32 | 3.09 | 0.08 | 0.06 | 0.50 | 0.24 | 16.98 | ||||||||||||
1978 | 0.73 | 0.84 | 0.12 | 2.25 | 4.99 | 1.39 | 1.25 | 1.29 | 0.91 | 0.55 | 0.62 | 1.07 | 16.01 | |||||||||||||
1979 | 0.39 | 0.01 | 4.50 | 1.69 | 4.20 | 4.28 | 2.53 | 2.77 | 0.83 | 1.88 | 1.69 | 0.28 | 25.05 | |||||||||||||
1980 | 0.95 | 0.59 | 1.89 | 2.17 | 2.36 | 2.00 | 1.57 | 2.83 | 0.32 | 0.26 | 0.40 | 0.22 | 15.56 | |||||||||||||
1981 | 0.13 | 0.64 | 3.17 | 2.09 | 5.89 | 1.88 | 4.00 | 2.93 | 0.13 | 2.03 | 0.17 | 0.01 | 23.07 | |||||||||||||
1982 | 0.49 | 0.19 | 0.92 | 0.68 | 4.60 | 5.57 | 5.80 | 2.70 | b | 1.95 | 0.71 | d | 1.42 | 1.27 | 26.30 | |||||||||||
1983 | 0.13 | 0.01 | 4.28 | 2.30 | 3.88 | 4.66 | b | 3.36 | a | 0.97 | 0.22 | 0.51 | 1.96 | 0.36 | 22.64 | |||||||||||
1984 | 0.49 | 0.51 | 1.35 | 3.90 | 1.93 | a | 3.08 | 0.99 | 1.99 | 0.75 | 1.21 | 0.09 | 1.06 | 17.35 | ||||||||||||
1985 | 0.31 | 0.08 | 0.31 | 2.83 | 1.80 | 2.69 | 3.76 | 0.51 | 2.40 | 0.53 | 1.00 | 1.36 | 17.58 | |||||||||||||
1986 | 0.12 | 0.66 | 0.92 | 3.73 | 2.16 | 7.06 | 1.18 | 1.97 | 0.69 | 1.04 | 0.41 | j | ----- | z | 19.53 | b | ||||||||||
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1998 | ----- | z | ----- | z | ----- | z | 0.86 | 2.19 | 3.38 | 3.18 | 1.20 | 0.98 | 2.04 | 1.00 | 0.16 | 14.99 | c | |||||||||
1999 | 0.04 | 0.06 | 0.67 | a | 3.10 | 2.35 | 4.24 | 2.28 | a | 2.26 | 0.98 | b | 0.01 | a | 0.08 | 0.33 | 16.40 | |||||||||
2000 | 0.14 | 0.02 | 0.75 | 1.98 | 1.23 | 0.59 | 2.15 | 0.73 | 0.25 | 0.35 | c | 0.14 | a | 0.02 | 8.35 | |||||||||||
2001 | 0.29 | 0.24 | 0.58 | 2.14 | 2.65 | 1.52 | 3.76 | 0.90 | 1.44 | 0.95 | 0.73 | 0.00 | 15.20 | |||||||||||||
2002 | 0.06 | 0.08 | 0.36 | 0.59 | 1.28 | 2.29 | 1.34 | 4.55 | 0.20 | 1.21 | 0.12 | 0.00 | a | 12.08 | ||||||||||||
2003 | 0.03 | 0.15 | 2.33 | 2.67 | 2.14 | 2.79 | 2.05 | 1.10 | 1.12 | 0.06 | 0.19 | 0.16 | 14.79 | |||||||||||||
2004 | 0.05 | 0.43 | 0.17 | 1.93 | 1.22 | 3.03 | 1.77 | 1.81 | 2.27 | 0.64 | 0.43 | 0.05 | 13.80 | |||||||||||||
2005 | 0.10 | 0.16 | 0.46 | 2.07 | 2.62 | 5.21 | 2.19 | 3.33 | 0.64 | 2.52 | 0.39 | 0.08 | 19.77 | |||||||||||||
2006 | 0.32 | 0.20 | 0.83 | 0.49 | 1.22 | 1.84 | 0.99 | 1.56 | 1.60 | 0.74 | 0.03 | 0.40 | 10.22 | |||||||||||||
2007 | 0.33 | 0.32 | 1.29 | 3.75 | 2.52 | 1.19 | 1.48 | 2.05 | 0.86 | 0.46 | 0.00 | 0.35 | 14.60 | |||||||||||||
2008 | 0.00 | 0.05 | 0.44 | 1.41 | 2.71 | 3.05 | 1.94 | 2.29 | a | 1.87 | 1.04 | 0.62 | 0.09 | 15.51 | ||||||||||||
2009 | 0.15 | 0.39 | 0.14 | 2.75 | a | 2.00 | 7.56 | 3.50 | 2.37 | 1.80 | 0.86 | 0.31 | 0.18 | 22.01 | ||||||||||||
2010 | 0.00 | 0.52 | 0.77 | a | 3.05 | 2.99 | 5.51 | 4.89 | 1.35 | 0.40 | 0.90 | 0.46 | 0.07 | 20.91 | ||||||||||||
2011 | 0.05 | 0.25 | 0.52 | 1.99 | 5.12 | 6.92 | 4.99 | 4.32 | 0.29 | 1.33 | 0.72 | 0.10 | 26.60 | |||||||||||||
2012 | 0.05 | 0.36 | a | 0.11 | 1.61 | 0.54 | 1.42 | 1.92 | 0.18 | 0.49 | 0.61 | 0.08 | 0.40 | a | 7.77 | |||||||||||
2013 | 0.17 | a | 0.41 | a | 0.16 | a | 1.23 | b | 2.82 | b | 0.25 | 1.45 | 0.69 | 7.05 | 1.25 | 0.45 | 0.02 | 15.95 | ||||||||
2014 | 0.22 | 0.73 | 0.14 | 0.29 | 3.00 | 3.42 | 0.35 | 2.91 | 2.99 | 0.86 | 0.46 | 0.88 | 16.25 | |||||||||||||
2015 | 0.37 | 0.37 | 0.28 | 5.51 | 7.91 | 2.57 | 1.64 | 0.54 | 0.25 | 1.57 | 0.70 | 0.95 | 22.66 | |||||||||||||
2016 | 0.06 | 1.11 | 1.02 | 1.68 | 2.23 | 1.10 | 1.41 | 2.31 | 0.60 | 0.37 | 0.23 | 0.36 | 12.48 | |||||||||||||
2017 | 0.09 | 0.02 | 0.41 | 1.23 | 1.88 | 0.65 | 0.06 | 1.23 | 0.63 | 0.50 | 0.16 | 0.20 | 7.06 | |||||||||||||
2018 | 0.11 | 0.03 | 0.14 | a | 0.76 | 4.51 | 2.07 | 1.85 | 0.37 | 0.42 | 0.11 | 0.23 | 0.02 | 10.62 | ||||||||||||
2019 | 0.00 | 0.06 | 0.63 | 0.50 | 3.26 | a | 1.45 | a | 2.81 | 2.60 | 1.02 | 0.01 | 0.22 | 0.02 | a | 12.58 | ||||||||||
2020 | 0.00 | 0.01 | 0.41 | 0.17 | 2.85 | 0.77 | 0.30 | i | 0.96 | 0.22 | 0.06 | 0.05 | 0.03 | 5.53 | a | |||||||||||
2021 | 0.01 | 0.03 | 2.13 | 0.54 | 1.88 | 0.22 | d | 1.92 | h | 0.64 | 0.72 | 0.28 | 0.06 | 0.03 | 6.54 | a | ||||||||||
2022 | 0.08 | 0.11 | 0.48 | 0.39 | 1.54 | 0.75 | 1.56 | 0.10 | 0.83 | 0.11 | 0.10 | 0.14 | a | 6.19 | ||||||||||||
2023 | 0.97 | a | 0.03 | 0.57 | a | 0.89 | 5.20 | 5.97 | 1.68 | 5.43 | 0.26 | 1.03 | 0.15 | 0.45 | 22.63 | |||||||||||
2024 | 0.40 | 0.87 | 0.62 | e | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.89 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.31 | 0.33 | 0.97 | 1.79 | 3.08 | 3.17 | 2.54 | 1.91 | 1.22 | 0.89 | 0.46 | 0.36 | 17.19 | |||||||||||||
S.D. | 0.33 | 0.29 | 0.92 | 1.13 | 1.65 | 2.23 | 1.42 | 1.33 | 1.27 | 0.79 | 0.44 | 0.36 | 4.90 | |||||||||||||
SKEW | 1.77 | 0.90 | 2.01 | 0.85 | 0.54 | 1.17 | 0.55 | 1.51 | 2.29 | 1.81 | 1.52 | 1.32 | -0.08 | |||||||||||||
MAX | 1.54 | 1.16 | 4.50 | 5.51 | 7.91 | 10.51 | 5.80 | 7.47 | 7.05 | 4.29 | 1.96 | 1.39 | 27.53 | |||||||||||||
MIN | 0.00 | 0.01 | 0.07 | 0.17 | 0.19 | 0.22 | 0.06 | 0.08 | 0.08 | 0.01 | 0.00 | 0.00 | 6.19 | |||||||||||||
YRS | 65 | 65 | 65 | 65 | 65 | 65 | 63 | 65 | 65 | 65 | 64 | 63 | 60 |