YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1941 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.01 | 4.64 | 2.18 | 0.06 | 0.07 | 8.96 | g | |||||
1942 | 0.13 | 0.68 | 0.18 | 4.45 | 0.28 | 5.02 | 0.35 | 3.59 | 1.35 | 3.18 | 0.03 | 0.78 | 20.02 | |||||||||||||
1943 | 0.13 | 0.02 | 0.10 | 0.88 | 1.32 | 0.61 | 1.17 | 4.34 | 0.09 | 0.68 | 0.03 | 0.76 | 10.13 | |||||||||||||
1944 | 1.00 | 0.17 | 0.73 | 3.96 | 4.88 | 0.55 | 4.30 | 1.00 | 0.00 | 1.43 | 0.64 | 0.28 | 18.94 | |||||||||||||
1945 | 0.92 | 0.25 | 0.03 | 1.26 | 0.54 | 1.12 | 1.13 | 4.33 | 1.46 | 0.19 | 0.09 | 0.12 | 11.44 | |||||||||||||
1946 | 0.24 | 0.47 | 1.05 | 0.72 | 2.85 | 1.07 | 1.16 | 2.67 | 0.21 | 2.44 | 3.51 | 0.00 | 16.39 | |||||||||||||
1947 | 0.13 | 0.25 | 1.01 | 1.41 | 3.08 | 1.03 | 0.95 | 1.01 | 0.12 | 0.42 | 0.06 | 0.54 | a | 10.01 | ||||||||||||
1948 | 0.33 | 0.66 | 1.21 | 0.39 | 2.79 | 3.11 | 1.07 | 2.14 | 0.39 | 0.17 | 0.08 | 0.05 | 12.39 | |||||||||||||
1949 | 0.50 | 0.07 | 0.73 | 0.94 | 2.93 | 3.42 | 1.34 | 3.32 | 0.02 | 0.81 | 0.02 | 0.00 | 14.10 | |||||||||||||
1950 | 0.07 | 0.06 | 0.34 | 0.06 | 0.71 | 0.63 | 2.07 | 2.13 | 1.76 | 0.12 | 0.05 | 0.12 | 8.12 | |||||||||||||
1951 | 0.51 | 0.00 | 0.10 | 0.46 | 1.11 | 4.29 | 0.55 | 2.40 | 0.25 | 0.42 | 0.51 | 0.00 | 10.60 | |||||||||||||
1952 | 0.07 | 0.19 | 0.25 | 0.91 | 1.12 | 0.00 | 0.34 | 1.83 | 1.17 | 0.00 | 0.70 | 0.01 | 6.59 | |||||||||||||
1953 | 0.25 | 0.00 | 2.20 | 0.83 | 1.62 | 0.31 | 0.67 | 1.62 | 0.00 | 0.12 | 1.31 | 0.96 | 9.89 | |||||||||||||
1954 | 0.21 | 0.01 | 0.34 | 0.17 | 1.95 | 0.09 | 4.30 | 0.68 | 0.23 | 1.69 | 0.02 | 0.12 | 9.81 | |||||||||||||
1955 | 0.00 | 0.00 | 0.06 | 0.50 | 3.24 | 0.46 | 0.73 | 3.24 | 0.66 | 0.10 | 0.05 | 0.07 | 9.11 | |||||||||||||
1956 | 0.16 | 0.13 | 0.00 | 0.46 | 0.61 | 1.24 | 2.03 | 4.68 | 0.02 | 0.03 | 0.22 | 0.00 | 9.58 | |||||||||||||
1957 | 0.09 | 0.00 | 0.31 | 3.15 | 2.48 | 1.02 | 1.20 | 0.92 | 1.66 | 0.60 | 0.56 | 0.00 | 11.99 | |||||||||||||
1958 | 0.46 | 0.26 | 0.99 | 0.75 | 3.80 | 0.91 | 3.18 | 2.10 | 0.21 | 0.11 | 0.34 | 0.07 | 13.18 | |||||||||||||
1959 | 0.46 | 0.32 | 0.17 | 0.64 | 2.42 | 0.50 | 0.63 | 1.49 | 0.70 | 2.43 | 0.09 | 0.00 | 9.85 | |||||||||||||
1960 | 1.11 | 0.98 | 0.27 | 1.14 | 1.08 | 0.96 | 2.43 | 0.03 | 0.82 | 2.34 | 0.15 | 0.86 | 12.17 | |||||||||||||
1961 | 0.00 | 0.50 | 0.75 | 0.14 | 1.09 | 3.06 | 5.59 | 3.32 | 1.26 | 0.29 | 1.38 | 0.22 | 17.60 | |||||||||||||
1962 | 0.28 | 0.01 | 0.37 | 0.51 | 1.85 | 2.74 | 3.69 | 0.12 | 0.36 | 0.35 | 0.60 | 0.14 | 11.02 | |||||||||||||
1963 | 0.18 | 0.10 | 0.60 | 0.00 | 1.31 | 1.48 | 0.74 | 2.61 | 1.75 | 0.17 | 0.39 | 0.23 | 9.56 | |||||||||||||
1964 | 0.00 | 0.28 | 0.04 | 0.80 | 5.43 | 0.28 | 1.02 | 0.37 | 0.45 | 0.14 | 0.40 | 0.14 | 9.35 | |||||||||||||
1965 | 0.06 | 0.15 | 0.69 | 0.05 | 3.24 | 4.99 | 3.34 | 0.51 | 0.71 | 2.02 | 0.03 | 0.83 | 16.62 | |||||||||||||
1966 | 0.40 | 0.56 | 0.00 | 1.23 | 0.01 | 0.39 | 1.51 | 3.56 | 1.58 | 0.51 | 0.00 | 0.26 | 10.01 | |||||||||||||
1967 | 0.16 | 0.00 | 0.15 | 0.20 | 2.84 | 1.16 | 1.27 | 0.56 | 1.18 | 0.34 | 0.39 | 0.24 | 8.49 | |||||||||||||
1968 | 0.02 | 0.08 | 0.30 | 0.75 | 0.87 | 2.27 | 3.54 | 0.69 | 0.57 | 0.42 | 0.02 | 0.17 | 9.70 | |||||||||||||
1969 | 0.02 | 0.09 | 0.69 | 1.58 | 1.33 | 1.46 | 0.97 | 1.59 | 2.73 | 1.65 | 0.16 | 0.20 | 12.47 | |||||||||||||
1970 | 0.00 | 0.00 | 0.58 | 0.89 | 1.42 | 1.47 | 2.56 | 1.57 | 1.28 | 1.09 | 0.06 | 0.00 | 10.92 | |||||||||||||
1971 | 0.11 | 1.37 | 0.04 | 0.89 | 4.28 | 0.74 | 4.23 | 1.23 | 1.32 | 0.88 | 0.90 | 0.07 | 16.06 | |||||||||||||
1972 | 0.14 | 0.03 | 0.17 | 0.80 | 1.07 | 0.63 | 0.62 | 2.60 | 0.69 | 0.63 | 0.58 | 0.36 | 8.32 | |||||||||||||
1973 | 0.02 | 0.00 | 2.66 | 0.96 | 1.00 | ----- | z | ----- | z | ----- | z | 2.46 | 0.38 | 0.42 | 0.21 | 8.11 | c | |||||||||
1974 | 0.08 | ----- | z | ----- | z | 0.00 | 0.00 | 1.40 | 1.66 | 0.05 | 0.00 | a | 1.69 | ----- | z | ----- | z | 4.88 | d | |||||||
1975 | ----- | z | 0.08 | 0.24 | 0.87 | 0.55 | 3.14 | 1.83 | 1.74 | 0.77 | 0.00 | 1.00 | a | 0.04 | 10.26 | a | ||||||||||
1976 | 0.19 | ----- | z | 0.07 | 1.17 | 1.80 | 0.21 | 1.75 | 1.27 | 1.62 | 1.34 | 0.10 | 0.00 | 9.52 | a | |||||||||||
1977 | 0.12 | 0.04 | 0.00 | 2.66 | 5.78 | 1.21 | 2.42 | 2.78 | 0.03 | 0.03 | 0.00 | ----- | z | 15.07 | a | |||||||||||
1978 | 0.20 | 0.25 | ----- | z | 1.98 | 0.97 | 5.51 | 1.11 | 2.16 | 0.16 | 0.39 | a | ----- | z | 0.24 | 12.97 | b | |||||||||
1979 | 0.18 | 0.02 | ----- | z | 0.26 | 3.05 | 1.40 | 1.93 | 1.75 | 0.36 | 0.81 | 0.44 | 0.82 | 11.02 | a | |||||||||||
1980 | 0.09 | k | 0.06 | 2.05 | 3.76 | 2.22 | 0.53 | 0.75 | 0.77 | 0.92 | 0.00 | 0.39 | 0.00 | 11.45 | a | |||||||||||
1981 | ----- | z | 0.03 | 0.51 | 0.25 | 2.17 | 0.30 | 1.94 | 1.86 | 0.50 | 0.08 | 0.19 | 0.08 | 7.91 | a | |||||||||||
1982 | 0.01 | k | 0.47 | i | 0.30 | f | 0.40 | a | 1.20 | n | 3.11 | g | 2.69 | 0.36 | y | 1.47 | 0.55 | k | 0.00 | j | 2.64 | a | 7.20 | h | ||
1983 | 0.21 | k | 0.70 | 2.27 | a | 1.43 | a | 2.75 | 1.02 | f | 0.99 | a | 0.78 | b | 0.05 | 0.03 | 0.09 | b | 0.17 | 9.26 | b | |||||
1984 | 0.18 | b | 0.10 | i | 1.21 | c | 1.65 | 1.21 | a | 0.85 | a | 2.16 | 0.13 | 0.58 | i | 2.76 | e | 0.00 | j | 0.28 | 10.43 | c | ||||
1985 | 0.29 | b | 0.12 | e | 0.02 | 1.85 | c | 4.56 | c | 0.38 | 1.92 | h | 2.03 | a | 0.75 | b | 1.52 | b | 0.37 | 0.24 | 12.13 | a | ||||
1986 | 0.02 | 0.09 | 0.00 | 1.16 | b | 0.61 | 2.43 | b | 3.66 | b | 2.84 | c | 1.75 | 2.42 | d | 0.84 | b | 0.20 | b | 16.02 | ||||||
1987 | 0.06 | 1.64 | c | 0.97 | c | 0.23 | b | 4.09 | i | 1.95 | a | 0.52 | c | 3.54 | d | 1.34 | d | 0.01 | 0.35 | b | 0.43 | c | 11.04 | a | ||
1988 | 0.21 | g | 0.13 | b | 0.06 | 0.72 | b | 1.02 | c | 3.90 | b | 1.85 | b | 0.86 | a | 4.80 | a | 0.02 | 0.00 | 0.10 | 13.46 | a | ||||
1989 | 0.18 | a | 0.09 | a | 0.32 | 0.03 | 2.87 | a | 1.96 | 0.77 | 3.78 | 2.64 | c | 0.18 | a | 0.04 | 0.17 | 13.03 | ||||||||
1990 | 0.64 | b | 1.15 | a | 0.57 | c | 0.24 | 2.95 | 1.99 | 7.44 | 0.32 | 2.32 | a | 1.37 | 0.81 | 0.37 | 20.17 | |||||||||
1991 | 0.45 | ----- | z | 0.48 | b | 1.97 | 0.55 | 2.01 | 4.43 | b | 4.08 | b | 0.94 | a | 0.52 | a | 1.57 | e | 0.76 | a | 17.76 | a | ||||
1992 | 0.04 | a | 0.71 | 0.26 | b | 0.03 | 0.68 | b | 3.39 | b | 4.23 | c | 4.39 | d | 0.58 | 0.21 | a | 1.16 | a | 0.05 | a | 15.73 | ||||
1993 | 0.30 | e | 0.96 | b | 0.58 | a | 1.00 | a | 1.50 | f | 2.04 | b | 0.53 | 3.44 | a | 0.91 | 1.43 | b | 0.84 | a | 0.02 | 12.05 | a | |||
1994 | 0.13 | 0.00 | 0.66 | 1.29 | a | 2.92 | f | 1.85 | g | 2.40 | f | 2.26 | a | 1.29 | c | 0.94 | b | 0.65 | a | 0.07 | a | 7.29 | c | |||
1995 | 0.51 | b | 0.11 | d | 0.54 | h | 2.53 | e | 4.92 | c | 6.65 | b | 2.00 | a | 0.96 | b | 0.51 | a | 0.01 | 0.00 | 0.08 | b | 18.28 | a | ||
1996 | 0.04 | 0.14 | a | 1.28 | b | 0.47 | a | 2.84 | b | 1.48 | e | 4.19 | b | 3.77 | c | 1.57 | d | 0.34 | a | 0.03 | 0.05 | 16.20 | ||||
1997 | 0.23 | a | 0.55 | a | 0.03 | 1.43 | a | 0.69 | 0.73 | 1.93 | 5.68 | 1.80 | 3.11 | e | 0.09 | 0.95 | 17.22 | |||||||||
1998 | 0.00 | 0.22 | 1.26 | 0.64 | 1.20 | 0.82 | a | 6.93 | 2.23 | 0.60 | 0.88 | 1.79 | 0.09 | 16.66 | ||||||||||||
1999 | 0.01 | 0.00 | 2.16 | 2.05 | 3.48 | 1.99 | 1.20 | 3.74 | 0.74 | 0.37 | 0.26 | 0.00 | 16.00 | |||||||||||||
2000 | 0.15 | 0.01 | 1.78 | 0.93 | b | 1.11 | 1.18 | b | 0.90 | 0.13 | 0.13 | 1.38 | 0.08 | b | 0.11 | 7.89 | ||||||||||
2001 | 0.76 | 0.22 | 0.70 | 0.08 | 4.98 | a | 1.62 | b | 4.20 | 0.30 | 0.74 | 0.03 | 0.04 | 0.16 | 13.83 | |||||||||||
2002 | 0.32 | 0.00 | 0.01 | 0.56 | 0.41 | 1.59 | a | 0.35 | 1.96 | 2.92 | 1.19 | 0.06 | 0.43 | 9.80 | ||||||||||||
2003 | 0.04 | a | 0.25 | a | 0.70 | 0.59 | 1.64 | b | 3.41 | a | 0.22 | 0.06 | b | 0.30 | 0.07 | 0.13 | a | 0.06 | 7.47 | |||||||
2004 | 0.09 | 0.21 | b | 0.49 | 3.81 | a | 0.19 | 2.09 | 2.82 | 4.70 | 1.50 | 0.94 | 1.15 | 0.03 | a | 18.02 | ||||||||||
2005 | 0.28 | 0.14 | 0.52 | 0.68 | 2.50 | g | 1.14 | a | 0.65 | 0.96 | 0.05 | 1.87 | 0.08 | 0.12 | a | 6.49 | a | |||||||||
2006 | 0.51 | 0.00 | 0.61 | 0.28 | 0.88 | 0.62 | 3.88 | 3.19 | 2.41 | b | 3.26 | 0.05 | 4.01 | 19.70 | ||||||||||||
2007 | 1.32 | c | 0.14 | a | 0.00 | b | 1.21 | 1.87 | 2.81 | 1.21 | a | 1.82 | 0.99 | 0.91 | 0.00 | 0.05 | 12.33 | |||||||||
2008 | 0.09 | 0.15 | 0.06 | 0.46 | 0.83 | 0.63 | 2.30 | 2.35 | 0.44 | 2.36 | 0.08 | 0.05 | 9.80 | |||||||||||||
2009 | 0.00 | 0.54 | 3.00 | 1.89 | 1.52 | 0.97 | d | 0.51 | f | 0.68 | 1.25 | 2.17 | d | 0.56 | 0.29 | b | 12.87 | a | ||||||||
2010 | 0.36 | 0.29 | 2.14 | 0.88 | 1.13 | 0.45 | 4.07 | 2.02 | 0.50 | 0.00 | b | 0.04 | 0.06 | 11.94 | ||||||||||||
2011 | 0.07 | g | 0.22 | 0.26 | c | 0.39 | c | 1.02 | b | 2.83 | c | 0.82 | 3.06 | 0.71 | 0.15 | 0.67 | 0.11 | c | 10.24 | a | ||||||
2012 | 0.00 | 0.21 | 0.14 | b | 0.79 | d | 0.15 | c | 1.64 | f | 0.89 | 0.43 | f | 1.20 | c | 0.25 | d | 0.00 | 0.25 | b | 3.88 | b | ||||
2013 | 0.04 | 0.04 | 0.10 | 0.23 | 0.17 | 3.02 | 1.58 | 0.92 | 1.77 | 0.61 | 0.22 | 0.00 | 8.70 | |||||||||||||
2014 | 0.18 | 0.28 | 0.08 | 1.00 | 0.16 | 2.44 | 2.37 | 1.01 | 0.56 | 1.03 | 0.29 | 0.78 | 10.18 | |||||||||||||
2015 | 0.12 | 0.86 | 0.09 | 0.87 | 6.04 | 2.11 | 1.45 | 2.46 | 1.06 | 1.36 | 0.35 | 0.19 | 16.96 | |||||||||||||
2016 | 0.10 | b | 0.17 | 0.16 | 4.93 | a | 0.53 | 5.61 | 1.73 | 1.99 | a | 1.51 | 0.00 | 0.67 | 0.43 | 17.83 | ||||||||||
2017 | 1.06 | 0.05 | 0.32 | 2.94 | 3.59 | 0.63 | 4.44 | a | 1.90 | 1.94 | 0.16 | 0.01 | 0.00 | 17.04 | ||||||||||||
2018 | 0.13 | 0.03 | 0.57 | 1.21 | 0.13 | 0.49 | 3.59 | a | 0.61 | 0.24 | 3.19 | 0.52 | 0.00 | 10.71 | ||||||||||||
2019 | 0.46 | 0.37 | a | 1.02 | 0.25 | 0.79 | 1.44 | 1.35 | 2.81 | 1.35 | 0.30 | 0.22 | 0.19 | 10.55 | ||||||||||||
2020 | 0.22 | 0.38 | 0.00 | 0.20 | 1.83 | 1.64 | 3.27 | 1.10 | 0.31 | 0.10 | 0.26 | 0.13 | 9.44 | |||||||||||||
2021 | 0.18 | 0.03 | b | 2.03 | 0.10 | 2.47 | b | 3.82 | 1.16 | 1.16 | 1.38 | 0.52 | 0.09 | 0.00 | 12.94 | |||||||||||
2022 | 0.15 | b | 0.17 | 0.63 | 0.08 | 1.68 | 3.85 | 3.21 | 4.03 | 0.60 | 0.02 | 0.02 | 0.03 | 14.47 | ||||||||||||
2023 | 0.67 | 0.11 | 0.04 | 1.75 | 2.40 | 6.87 | 1.79 | 1.12 | 0.59 | 0.34 | 0.01 | a | 0.53 | c | 16.22 | |||||||||||
2024 | 0.21 | 0.37 | h | 0.30 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.51 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.26 | 0.26 | 0.61 | 1.07 | 1.91 | 1.88 | 2.13 | 2.02 | 1.04 | 0.87 | 0.39 | 0.29 | 12.73 | |||||||||||||
S.D. | 0.28 | 0.33 | 0.70 | 1.06 | 1.48 | 1.56 | 1.54 | 1.34 | 0.92 | 0.92 | 0.54 | 0.56 | 3.64 | |||||||||||||
SKEW | 1.85 | 2.10 | 1.59 | 1.76 | 0.97 | 1.32 | 1.20 | 0.48 | 1.73 | 1.10 | 3.06 | 4.70 | 0.41 | |||||||||||||
MAX | 1.32 | 1.64 | 3.00 | 4.93 | 6.04 | 6.87 | 7.44 | 5.68 | 4.80 | 3.26 | 3.51 | 4.01 | 20.17 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.22 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 6.59 | |||||||||||||
YRS | 76 | 77 | 78 | 82 | 77 | 77 | 78 | 80 | 82 | 82 | 79 | 81 | 59 |