YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1947 | 0.70 | 0.50 | 0.55 | 1.36 | 3.08 | 0.82 | a | 0.72 | x | 1.24 | q | 0.00 | 0.00 | 0.79 | ----- | z | 7.80 | c | ||||||||
1948 | ----- | z | 0.45 | w | ----- | z | ----- | z | 1.35 | g | 0.93 | e | 1.21 | c | 4.40 | j | 1.80 | w | 0.71 | o | 0.00 | r | 0.00 | 2.14 | i | |
1949 | 2.05 | q | ----- | z | 1.00 | 0.11 | 2.82 | 3.57 | 2.25 | 1.11 | l | 2.07 | g | ----- | z | ----- | z | ----- | z | 9.75 | g | |||||
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.70 | 9.84 | 2.45 | 5.31 | 0.00 | 0.00 | 0.00 | 19.30 | e | |||||||
1951 | 0.41 | 1.01 | a | 0.00 | ----- | z | 4.94 | 0.00 | 0.89 | 0.95 | 0.00 | 0.85 | 0.00 | 0.00 | 9.05 | a | ||||||||||
1952 | 0.53 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.53 | k | |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.08 | 0.08 | k | |
1955 | 0.87 | 0.00 | 0.00 | 0.00 | 5.34 | 0.95 | 1.17 | 0.82 | 2.40 | 1.50 | 0.00 | 0.00 | 13.05 | |||||||||||||
1956 | 0.00 | 1.90 | b | ----- | z | 0.00 | 1.64 | 2.03 | 2.32 | 0.28 | 0.00 | 0.42 | 0.00 | 0.00 | 8.59 | a | ||||||||||
1957 | 0.12 | 1.00 | 1.72 | a | 2.20 | 2.84 | 2.76 | 0.10 | 1.98 | 1.39 | 4.46 | 1.41 | 0.10 | 20.08 | ||||||||||||
1958 | 1.51 | 0.26 | 1.68 | a | 1.76 | b | 0.56 | 1.82 | 2.09 | 1.82 | 2.97 | 0.08 | 1.04 | 0.15 | 15.74 | |||||||||||
1959 | 0.04 | 0.00 | 0.10 | 0.60 | 4.07 | 5.04 | 3.91 | 1.98 | 0.32 | 3.13 | 0.00 | 1.99 | 21.18 | |||||||||||||
1960 | 0.90 | 1.10 | 0.90 | a | 0.57 | 0.80 | 3.66 | 5.86 | 1.41 | 0.86 | 5.10 | 0.00 | 1.29 | 22.45 | ||||||||||||
1961 | 0.30 | 1.30 | 1.07 | 0.00 | 1.45 | 3.01 | 3.21 | 0.60 | 2.22 | 0.75 | 1.78 | 0.27 | 15.96 | |||||||||||||
1962 | 0.92 | 0.20 | 0.00 | 0.40 | 0.38 | 2.22 | 4.35 | 0.00 | 6.07 | 2.50 | 1.50 | 0.00 | 18.54 | |||||||||||||
1963 | ----- | z | 1.50 | 0.50 | 0.60 | 2.31 | 7.62 | 2.02 | 0.98 | ----- | z | 0.40 | 1.30 | 0.19 | 17.42 | b | ||||||||||
1964 | 0.10 | 1.30 | 0.00 | 0.00 | 1.18 | 4.03 | 0.12 | 1.52 | 2.62 | 0.57 | 1.23 | 0.99 | 13.66 | |||||||||||||
1965 | 0.40 | 0.45 | 1.30 | 0.98 | 1.22 | 8.75 | 1.11 | 0.45 | 1.37 | 1.27 | 0.10 | 0.36 | 17.76 | |||||||||||||
1966 | 0.54 | 0.16 | 0.00 | 1.77 | 0.70 | 3.67 | 0.32 | 9.06 | 1.56 | 0.00 | 0.20 | 0.08 | 18.06 | |||||||||||||
1967 | 0.00 | 0.30 | 0.23 | 1.02 | 1.39 | 9.35 | 4.34 | 0.45 | 1.52 | 0.34 | 0.11 | 0.37 | 19.42 | |||||||||||||
1968 | 0.77 | 0.47 | 0.80 | 0.11 | 3.51 | 1.20 | 1.55 | 2.74 | 0.72 | 0.63 | 1.19 | 0.22 | 13.91 | |||||||||||||
1969 | 0.00 | 0.49 | 0.80 | 1.15 | 4.23 | 3.87 | 0.75 | 2.59 | 5.18 | 3.61 | 0.67 | 0.41 | 23.75 | |||||||||||||
1970 | 0.32 | 0.02 | 1.01 | 0.14 | 0.78 | 1.50 | 0.02 | 1.21 | 0.63 | 1.03 | 0.09 | 0.00 | 6.75 | |||||||||||||
1971 | 0.01 | 0.03 | 0.06 | 1.02 | 0.94 | 2.04 | 1.71 | 4.31 | 6.44 | 2.97 | 2.11 | 1.10 | 22.74 | |||||||||||||
1972 | 0.08 | 0.13 | 0.05 | 0.00 | 2.42 | 4.13 | 4.22 | 2.70 | 3.24 | 2.86 | 1.63 | 0.43 | 21.89 | |||||||||||||
1973 | 0.49 | 0.70 | a | 3.73 | 2.48 | 0.90 | 1.59 | 5.49 | 1.85 | 1.51 | 0.47 | 0.00 | 0.07 | 19.28 | ||||||||||||
1974 | 0.56 | 0.02 | 0.90 | 1.76 | 0.51 | 1.98 | 0.22 | 6.14 | 3.74 | 4.55 | 0.34 | 0.70 | 21.42 | |||||||||||||
1975 | 0.69 | 1.10 | 0.14 | 1.22 | 1.56 | 1.58 | 4.80 | 0.88 | 1.72 | 0.00 | 0.68 | 0.20 | 14.57 | |||||||||||||
1976 | 0.00 | 0.00 | 0.53 | 0.90 | b | 0.64 | 2.93 | 2.21 | 1.83 | 1.91 | 1.09 | 0.44 | 0.00 | 12.48 | ||||||||||||
1977 | 0.09 | u | 0.22 | 0.52 | 2.79 | 5.15 | 0.49 | 0.14 | 1.79 | 1.18 | 1.04 | 0.00 | 0.02 | 13.34 | a | |||||||||||
1978 | 0.26 | 0.52 | 0.23 | 0.26 | 4.20 | 3.71 | 1.97 | 0.16 | 2.34 | 0.56 | 3.30 | 0.04 | a | 17.55 | ||||||||||||
1979 | 1.10 | 0.37 | 1.75 | 0.88 | 1.82 | 2.83 | ----- | z | 5.43 | 0.00 | 0.82 | 0.16 | 0.00 | 15.16 | a | |||||||||||
1980 | ----- | z | 0.71 | 0.03 | 0.55 | 2.71 | 1.33 | 0.88 | 3.20 | 2.11 | ----- | z | ----- | z | ----- | z | 11.52 | d | ||||||||
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1982 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.25 | s | 3.70 | 1.53 | 1.01 | a | 6.24 | i | ||
1987 | 0.73 | 0.92 | 0.39 | 0.06 | 4.99 | 2.33 | 1.16 | 4.32 | 4.23 | 0.66 | 0.20 | 0.99 | 20.98 | |||||||||||||
1988 | 0.19 | 0.08 | 0.85 | 1.65 | 4.04 | 1.70 | 3.48 | 1.05 | 3.34 | 0.08 | 0.25 | 0.15 | 16.86 | |||||||||||||
1989 | 0.30 | 0.72 | 0.84 | 0.00 | 1.60 | 6.78 | 1.14 | 3.88 | 2.40 | 0.00 | 0.00 | 0.47 | 18.13 | |||||||||||||
1990 | 0.99 | 1.77 | 1.10 | 1.53 | 1.09 | 0.63 | 2.43 | 3.40 | 0.76 | 0.36 | 1.50 | 0.08 | 15.64 | |||||||||||||
1991 | 0.57 | 0.12 | 0.20 | 0.00 | 5.27 | 5.97 | 4.67 | 3.26 | 5.74 | 0.05 | 0.92 | a | 3.15 | 29.92 | ||||||||||||
1992 | 0.98 | 0.55 | 1.00 | 1.02 | 5.07 | 5.77 | 3.28 | 2.26 | 0.77 | 0.00 | 1.10 | 0.96 | 22.76 | |||||||||||||
1993 | 0.96 | 0.41 | 0.37 | 0.45 | 2.03 | 1.16 | 1.83 | 1.55 | 1.07 | 1.44 | 0.50 | 0.29 | 12.06 | |||||||||||||
1994 | 0.14 | 0.00 | 1.74 | 1.03 | 3.41 | 1.78 | 2.29 | 1.26 | 0.58 | 0.02 | 1.16 | 0.34 | 13.75 | |||||||||||||
1995 | 0.26 | 0.59 | 0.51 | 1.34 | 5.25 | 1.71 | 1.62 | 0.56 | 3.55 | 0.79 | 0.00 | 0.78 | 16.96 | |||||||||||||
1996 | 0.00 | 0.02 | 0.04 | 0.00 | 0.96 | 3.46 | 3.37 | 3.20 | 2.02 | 0.56 | 1.18 | 0.10 | 14.91 | |||||||||||||
1997 | 0.39 | 0.57 | 0.01 | 4.95 | 2.77 | 1.17 | 2.18 | 3.91 | 1.61 | 0.96 | 1.05 | 0.50 | d | 20.07 | ||||||||||||
1998 | 0.00 | 1.75 | 1.61 | 0.60 | 0.51 | 0.70 | 1.09 | 1.53 | 0.10 | 4.07 | 1.11 | 0.41 | a | 13.48 | ||||||||||||
1999 | 1.02 | b | 0.03 | 1.13 | 1.51 | 6.41 | 3.99 | 1.36 | 1.37 | 2.45 | 0.88 | 0.00 | 1.52 | 21.67 | ||||||||||||
2000 | 0.07 | 0.00 | 2.00 | 2.37 | 0.07 | 4.82 | 0.23 | 0.08 | 0.00 | 2.34 | 1.61 | b | 0.00 | c | 13.59 | |||||||||||
2001 | 1.41 | b | 1.56 | 2.32 | 0.00 | 6.68 | 0.16 | 0.17 | 2.37 | 0.83 | 0.33 | 2.32 | 0.31 | 18.46 | ||||||||||||
2002 | 1.00 | 0.30 | 1.09 | 0.38 | 0.60 | 1.03 | 0.99 | 4.28 | 0.17 | 4.36 | 0.46 | 0.98 | 15.64 | |||||||||||||
2003 | 0.00 | 0.19 | a | 0.65 | 0.42 | 0.28 | 4.51 | 0.01 | 1.46 | 2.10 | 0.99 | 0.20 | 0.00 | 10.81 | ||||||||||||
2004 | 0.97 | 1.15 | 2.06 | 3.26 | 0.44 | 5.54 | 2.08 | 3.94 | 3.49 | 3.38 | 4.70 | 0.24 | 31.25 | |||||||||||||
2005 | 1.15 | 0.67 | 0.91 | 1.12 | 1.24 | 1.95 | 2.58 | 5.28 | 0.66 | 0.74 | 0.02 | 0.02 | 16.34 | |||||||||||||
2006 | 0.08 | 0.17 | 1.41 | 0.69 | 1.59 | 2.24 | 0.75 | 5.66 | a | 4.89 | 1.95 | 0.21 | 2.13 | 21.77 | ||||||||||||
2007 | 1.20 | 0.14 | 4.05 | 1.02 | 2.17 | 4.34 | 0.48 | 1.14 | 0.70 | 0.20 | 0.03 | 1.32 | a | 16.79 | ||||||||||||
2008 | 0.00 | 0.42 | 0.02 | 0.35 | 2.40 | 1.56 | 1.22 | 5.71 | 1.21 | 2.50 | 0.07 | 0.00 | 15.46 | |||||||||||||
2009 | 0.02 | 0.64 | 0.28 | 3.64 | 1.11 | 3.73 | 3.10 | 1.03 | 1.96 | 2.38 | 0.15 | 0.98 | 19.02 | |||||||||||||
2010 | 1.39 | 0.83 | 1.29 | 3.24 | 2.57 | 1.31 | 2.95 | 2.04 | 1.25 | 2.09 | 0.45 | 0.00 | 19.41 | |||||||||||||
2011 | 0.00 | 0.54 | 0.45 | 0.03 | 0.26 | 0.15 | 0.26 | 0.98 | 2.42 | 1.75 | 0.11 | 1.02 | 7.97 | |||||||||||||
2012 | 0.01 | 0.45 | 0.85 | 0.43 | 1.57 | 2.54 | 0.54 | 0.68 | 2.04 | 0.15 | 0.00 | 0.49 | 9.75 | |||||||||||||
2013 | 0.63 | 1.59 | 0.53 | 0.02 | 0.39 | 4.17 | 5.94 | 1.59 | 1.01 | 0.32 | 0.84 | 0.15 | 17.18 | |||||||||||||
2014 | 0.00 | 0.08 | 0.35 | 0.08 | 4.28 | 3.86 | 5.35 | 1.02 | 4.38 | 0.89 | 0.91 | 0.12 | 21.32 | |||||||||||||
2015 | 0.77 | 0.34 | 0.22 | 2.14 | 7.60 | 1.29 | 6.48 | 2.26 | 0.44 | 6.16 | 2.71 | 1.86 | 32.27 | |||||||||||||
2016 | 0.04 | 0.02 | 0.03 | 1.66 | 1.19 | 1.68 | 0.33 | 3.86 | 4.30 | 0.32 | 1.48 | 0.10 | 15.01 | |||||||||||||
2017 | 1.54 | 0.58 | 1.62 | 1.98 | 0.45 | 2.13 | 2.90 | 6.30 | 3.77 | 1.13 | 0.02 | 0.00 | 22.42 | |||||||||||||
2018 | 0.00 | 0.38 | 0.04 | 0.73 | 3.46 | 2.12 | 1.21 | 2.09 | 1.56 | 3.12 | 0.24 | 0.75 | 15.70 | |||||||||||||
2019 | 0.05 | 0.16 | 1.28 | 0.85 | 2.86 | 1.54 | 2.69 | 0.37 | 1.70 | 4.90 | 0.68 | 0.49 | 17.57 | |||||||||||||
2020 | 0.20 | 0.50 | 1.57 | 0.03 | 0.81 | 0.46 | 1.97 | 0.57 | 0.39 | 0.43 | 0.28 | 0.06 | 7.27 | |||||||||||||
2021 | 0.20 | 0.16 | 0.81 | 0.10 | 4.24 | 4.47 | 4.50 | 1.70 | 0.80 | 2.09 | 0.00 | 0.09 | 19.16 | |||||||||||||
2022 | 0.08 | 0.07 | 0.51 | 0.08 | 1.01 | 0.05 | 1.60 | 5.76 | 1.22 | 1.98 | 0.36 | 0.14 | 12.86 | |||||||||||||
2023 | 0.31 | 0.20 | 0.12 | 0.95 | 5.70 | 3.61 | 2.22 | 2.12 | 1.71 | 1.07 | 0.28 | 1.44 | 19.73 | |||||||||||||
2024 | 0.54 | 0.26 | 0.23 | a | 1.26 | m | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.03 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.47 | 0.53 | 0.82 | 0.99 | 2.43 | 2.76 | 2.27 | 2.36 | 2.01 | 1.52 | 0.74 | 0.49 | 17.66 | |||||||||||||
S.D. | 0.45 | 0.50 | 0.82 | 1.03 | 1.88 | 2.01 | 1.91 | 1.86 | 1.63 | 1.53 | 0.89 | 0.63 | 5.09 | |||||||||||||
SKEW | 0.71 | 1.11 | 1.70 | 1.48 | 0.80 | 1.17 | 1.35 | 1.23 | 0.96 | 1.14 | 1.95 | 1.90 | 0.47 | |||||||||||||
MAX | 1.54 | 1.90 | 4.05 | 4.95 | 7.60 | 9.35 | 9.84 | 9.06 | 6.44 | 6.16 | 4.70 | 3.15 | 32.27 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.07 | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 6.75 | |||||||||||||
YRS | 64 | 66 | 66 | 65 | 66 | 68 | 66 | 65 | 65 | 66 | 66 | 67 | 58 |