YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1931 | 1.08 | d | 0.12 | 0.51 | 0.01 | 0.00 | 1.43 | 0.00 | a | 0.00 | 0.30 | 0.12 | 0.82 | a | 2.36 | 6.75 | ||||||||||
1932 | 1.36 | 0.36 | 0.74 | 0.17 | 0.54 | 0.00 | 0.24 | 0.13 | 0.00 | 0.04 | 1.23 | 1.08 | a | 5.89 | ||||||||||||
1933 | 0.51 | 0.12 | 0.90 | a | 0.11 | 1.54 | 0.42 | 0.00 | 0.23 | 0.87 | 1.25 | 0.62 | 4.91 | 11.48 | ||||||||||||
1934 | 1.12 | 0.10 | 0.57 | 0.45 | 0.27 | 0.12 | 0.10 | 0.05 | 1.70 | 2.21 | 1.53 | 1.09 | 9.31 | |||||||||||||
1935 | 1.76 | 0.22 | 0.53 | 0.05 | 0.13 | 0.34 | 0.25 | 0.04 | 0.09 | 0.37 | 0.43 | 0.94 | 5.15 | |||||||||||||
1936 | 1.65 | 0.57 | 0.56 | 0.32 | 0.25 | 4.58 | 0.04 | 0.12 | 0.41 | 0.00 | c | 0.03 | 1.06 | 9.59 | ||||||||||||
1937 | 1.05 | 1.02 | 2.24 | 1.24 | 0.02 | 3.07 | 0.06 | 0.20 | 0.28 | a | 0.30 | 2.47 | 1.50 | 13.45 | ||||||||||||
1938 | 0.39 | 2.62 | 1.09 | 0.18 | 0.00 | 0.31 | 0.15 | 0.03 | 0.10 | 0.47 | 0.47 | 0.75 | 6.56 | |||||||||||||
1939 | 0.52 | 1.38 | 0.18 | 0.00 | 0.41 | 0.10 | 0.00 | 0.01 | 0.01 | 0.49 | 0.15 | d | 1.77 | 5.02 | ||||||||||||
1940 | 1.37 | 1.74 | 0.38 | 1.20 | 0.66 | 0.00 | 0.18 | 0.00 | 1.23 | 1.16 | 1.23 | 1.79 | a | 10.94 | ||||||||||||
1941 | 1.07 | 0.41 | 0.50 | 0.97 | 0.88 | 0.40 | 0.03 | 1.14 | 0.99 | 0.40 | 1.22 | 1.78 | 9.79 | |||||||||||||
1942 | 1.34 | 1.54 | 0.17 | 0.30 | 1.07 | 0.22 | 0.05 | 0.18 | 0.00 | 0.21 | 3.51 | 1.80 | 10.39 | |||||||||||||
1943 | 0.69 | 0.29 | 0.56 | 0.06 | 0.36 | 1.47 | 0.00 | 0.16 | 0.01 | 1.61 | 0.56 | 0.11 | 5.88 | |||||||||||||
1944 | 0.28 | 1.39 | 0.11 | 0.91 | 0.18 | 1.40 | 0.00 | 0.07 | 0.80 | 0.09 | 0.62 | f | 0.17 | c | 5.40 | a | ||||||||||
1945 | 1.17 | 2.08 | 0.35 | 0.49 | 0.82 | 0.47 | 0.00 | 0.05 | 0.11 | 0.41 | i | 1.02 | 2.31 | 8.87 | a | |||||||||||
1946 | 1.68 | 0.67 | d | 0.67 | 0.01 | 0.61 | 0.71 | d | 0.04 | f | 0.01 | h | 0.72 | h | 0.77 | a | 1.77 | i | 0.55 | 5.67 | d | |||||
1947 | 0.47 | 0.80 | 0.11 | e | 0.14 | b | 0.00 | a | 0.60 | c | 0.00 | k | 0.10 | 0.59 | 1.79 | 0.43 | b | 0.41 | b | 5.44 | a | |||||
1948 | 1.15 | a | 1.48 | i | 0.59 | i | 0.68 | p | 3.23 | 3.20 | 0.76 | 0.51 | 1.30 | 0.32 | 1.19 | 2.68 | 14.34 | c | ||||||||
1949 | 0.16 | 1.51 | 1.03 | 0.00 | 0.03 | 0.00 | 0.02 | 0.16 | 0.53 | 0.72 | 1.32 | 0.29 | 5.77 | |||||||||||||
1950 | 1.97 | 0.97 | 1.00 | 0.41 | 0.52 | 1.88 | 0.06 | 0.08 | 0.03 | 1.97 | 1.78 | 1.93 | 12.60 | |||||||||||||
1951 | 1.61 | 1.20 | 0.61 | 0.10 | 1.58 | 0.87 | 0.62 | 1.70 | 0.25 | 0.93 | 1.00 | 1.40 | 11.87 | |||||||||||||
1952 | 1.27 | 0.75 | 0.03 | 0.00 | 0.18 | 1.23 | 0.02 | 1.58 | 0.16 | 0.03 | 0.23 | 0.94 | 6.42 | |||||||||||||
1953 | 3.09 | 0.22 | 0.04 | 1.04 | 2.17 | 0.70 | 0.04 | 0.78 | a | 0.00 | 0.04 | 0.99 | 0.84 | 9.95 | ||||||||||||
1954 | 1.70 | 0.34 | 0.29 | 0.03 | 0.32 | 0.32 | 0.22 | 0.89 | 0.70 | 0.14 | 0.76 | 0.21 | 5.92 | |||||||||||||
1955 | 0.77 | 0.49 | 0.60 | 1.14 | 0.32 | 0.05 | 0.17 | 0.00 | 0.29 | 0.64 | 2.28 | 2.65 | 9.40 | |||||||||||||
1956 | 1.94 | 0.53 | 0.30 | 0.17 | 0.78 | 1.35 | a | 0.00 | k | 2.06 | 0.34 | 1.78 | 0.56 | 0.94 | 10.75 | a | ||||||||||
1957 | 0.68 | 0.57 | 2.16 | 0.67 | 1.33 | 0.50 | 0.00 | 0.25 | 0.24 | 1.76 | 0.15 | 0.80 | 9.11 | |||||||||||||
1958 | 0.94 | 1.67 | 1.90 | 1.19 | 0.06 | 1.20 | 0.03 | 0.06 | 0.05 | 0.30 | 2.94 | 1.44 | 11.78 | |||||||||||||
1959 | 1.16 | 1.15 | 0.39 | 0.20 | 0.40 | 0.22 | 0.00 | 0.00 | 1.96 | 1.44 | 1.01 | 0.44 | 8.37 | |||||||||||||
1960 | 0.41 | 2.04 | 0.46 | 1.57 | 0.81 | 0.03 | 0.04 | 0.36 | 0.05 | 0.12 | 1.25 | 0.85 | 7.99 | |||||||||||||
1961 | 0.99 | 1.36 | 1.44 | 0.47 | 0.77 | 0.32 | 0.38 | 0.54 | 0.09 | 0.08 | 1.29 | 1.08 | 8.81 | |||||||||||||
1962 | 0.22 | 1.33 | 0.62 | 0.60 | 1.61 | 0.85 | 0.16 | 0.46 | 0.23 | 1.73 | 1.31 | 0.34 | 9.46 | |||||||||||||
1963 | 0.08 | 1.49 | 0.57 | 1.47 | 0.30 | 0.30 | 0.29 | 0.02 | 0.00 | 0.12 | 1.00 | 1.45 | 7.09 | |||||||||||||
1964 | 1.48 | 0.17 | 0.25 | 0.60 | 0.12 | 1.01 | 0.10 | 0.29 | 0.02 | 0.23 | 1.05 | 2.65 | 7.97 | |||||||||||||
1965 | 1.44 | 0.32 | 0.19 | 0.64 | 0.47 | 0.20 | 0.45 | 1.89 | 0.07 | 0.02 | 2.03 | 1.38 | 9.10 | |||||||||||||
1966 | 1.41 | 0.13 | 1.19 | 0.00 | 0.11 | 0.61 | 0.79 | 0.00 | 0.40 | 0.57 | 1.36 | 1.39 | 7.96 | |||||||||||||
1967 | 0.67 | 0.04 | 0.27 | 3.24 | 0.47 | 0.18 | 0.00 | 0.00 | 0.04 | 1.62 | 0.33 | 0.84 | 7.70 | |||||||||||||
1968 | 2.11 | 1.18 | 0.14 | 0.46 | 0.21 | 0.29 | 0.00 | 1.41 | 0.07 | 0.70 | 1.53 | 2.96 | 11.06 | |||||||||||||
1969 | 1.48 | 1.63 | 0.04 | 0.60 | 0.01 | 0.16 | 0.00 | 0.05 | 0.43 | 0.21 | 0.15 | 2.36 | 7.12 | |||||||||||||
1970 | 3.15 | 0.54 | 0.43 | 0.26 | 0.08 | 0.04 | 0.00 | 0.00 | 0.00 | 0.17 | 1.63 | 1.88 | 8.18 | |||||||||||||
1971 | 1.66 | 0.16 | ----- | z | 0.35 | 0.27 | 0.58 | 0.05 | 0.16 | 0.68 | 0.35 | 0.75 | 3.27 | 8.28 | a | |||||||||||
1972 | 2.22 | ----- | z | 1.29 | 0.26 | 1.03 | 2.44 | 0.03 | 0.96 | 0.30 | 0.00 | 1.21 | 1.40 | 11.14 | a | |||||||||||
1973 | 0.89 | 0.04 | 0.07 | 0.00 | 0.31 | 0.04 | 0.03 | 0.03 | 1.05 | 1.44 | 2.52 | 2.33 | 8.75 | |||||||||||||
1974 | 2.57 | 0.43 | 1.21 | 0.48 | 0.30 | 0.23 | 0.25 | 0.00 | 0.00 | 0.39 | 0.54 | 1.24 | 7.64 | |||||||||||||
1975 | 1.35 | 1.12 | 0.57 | 0.65 | 0.79 | 0.17 | 0.29 | 3.09 | 0.00 | 0.75 | 1.58 | 0.85 | 11.21 | |||||||||||||
1976 | 0.94 | 0.99 | 0.14 | 0.21 | 0.10 | 0.06 | 0.14 | 2.03 | 0.01 | 0.09 | 0.03 | 0.08 | 4.82 | |||||||||||||
1977 | 0.10 | 0.50 | 0.36 | 0.12 | 0.57 | 0.90 | 0.02 | 0.55 | 1.12 | 0.08 | 1.35 | 2.63 | 8.30 | |||||||||||||
1978 | 2.14 | 1.12 | 0.73 | 1.35 | 0.26 | 0.40 | 0.37 | 0.08 | 0.62 | 0.00 | 0.84 | 0.46 | 8.37 | |||||||||||||
1979 | 0.64 | 1.29 | 0.20 | 0.19 | 0.04 | 0.11 | 0.03 | 0.07 | 0.02 | 0.94 | 1.41 | 2.17 | 7.11 | |||||||||||||
1980 | 1.87 | 1.83 | 0.07 | 0.49 | 0.85 | 0.59 | 0.00 | 0.45 | 1.21 | 0.30 | 1.54 | 2.11 | 11.31 | |||||||||||||
1981 | 1.39 | 0.68 | a | 0.03 | 0.46 | 1.95 | 0.59 | 0.62 | 0.18 | 0.39 | 0.51 | 1.74 | 2.30 | 10.84 | ||||||||||||
1982 | 1.42 | 1.10 | 1.01 | 0.16 | 0.63 | 0.70 | 1.02 | 0.09 | 0.52 | 0.99 | 1.22 | a | 1.97 | a | 10.83 | |||||||||||
1983 | 2.05 | 1.43 | 2.07 | 0.85 | 0.08 | a | 0.39 | 0.45 | 0.35 | 0.81 | 0.03 | 4.45 | 1.61 | 14.57 | ||||||||||||
1984 | 1.12 | 0.52 | 1.35 | 0.78 | 0.20 | 1.89 | 0.00 | 0.00 | 1.35 | 0.04 | 2.21 | 0.21 | 9.67 | |||||||||||||
1985 | 0.12 | 1.08 | 0.75 | 0.09 | 0.45 | 0.60 | 0.05 | 0.00 | 0.66 | 0.98 | 1.09 | 1.11 | 6.98 | |||||||||||||
1986 | 2.11 | 1.49 | 0.22 | 0.16 | 0.04 | 0.01 | 0.11 | 0.06 | 2.14 | 0.18 | 0.93 | 0.21 | 7.66 | |||||||||||||
1987 | 0.75 | a | 1.00 | 0.51 | 0.08 | 0.61 | 0.82 | 1.40 | 0.00 | 0.00 | 0.00 | 0.34 | 3.18 | a | 8.69 | |||||||||||
1988 | 0.63 | 0.02 | 0.11 | 0.92 | 0.13 | 1.30 | 0.00 | 0.10 | 0.07 | 0.03 | 1.32 | 0.87 | 5.50 | |||||||||||||
1989 | 0.47 | 1.40 | 1.05 | 1.06 | 0.40 | 0.00 | 0.02 | 0.63 | 0.00 | 0.79 | 0.69 | 0.96 | 7.47 | |||||||||||||
1990 | 2.09 | 0.28 | 0.29 | 0.21 | 1.31 | 0.64 | a | 0.17 | 1.21 | 0.00 | 0.89 | 0.80 | 0.85 | 8.74 | ||||||||||||
1991 | 0.39 | 0.17 | 1.30 | 0.27 | 1.25 | 1.07 | a | 0.21 | 0.62 | 0.07 | 0.43 | 1.64 | 0.48 | 7.90 | ||||||||||||
1992 | 1.00 | 0.98 | 0.35 | 1.60 | 0.00 | 1.92 | 1.28 | 0.00 | 0.07 | 0.38 | 1.11 | 2.19 | 10.88 | |||||||||||||
1993 | 1.17 | 0.38 | 0.41 | 0.81 | 1.27 | v | 0.85 | s | 0.38 | u | 0.04 | 0.00 | ----- | z | 0.26 | 1.49 | t | 3.07 | e | |||||||
1994 | 0.49 | v | 0.32 | t | 0.00 | b | 1.25 | t | ----- | z | 0.57 | w | ----- | z | ----- | z | 0.00 | 1.98 | x | 1.20 | r | 1.55 | k | 0.00 | j | |
1995 | 3.32 | 0.91 | 1.31 | 1.22 | 0.59 | 0.38 | 0.35 | 0.17 | 0.41 | 0.34 | 2.38 | 1.80 | 13.18 | |||||||||||||
1996 | 1.25 | 1.90 | 0.45 | 0.14 | 0.41 | 0.62 | 0.07 | 0.00 | 0.18 | 0.56 | 1.46 | 4.17 | a | 11.21 | ||||||||||||
1997 | 1.65 | 0.60 | 0.66 | 0.28 | 0.25 | 1.10 | 0.50 | 0.38 | 0.29 | 1.91 | 1.39 | 0.45 | 9.46 | |||||||||||||
1998 | 2.08 | 2.22 | 0.63 | 0.57 | 1.68 | 0.27 | 0.29 | 0.04 | 0.02 | 0.07 | 2.07 | 2.06 | 12.00 | |||||||||||||
1999 | 1.34 | 1.60 | 0.54 | 0.00 | 0.12 | a | 0.02 | 0.07 | 0.44 | 0.00 | 0.49 | 1.27 | 0.74 | a | 6.63 | |||||||||||
2000 | 1.12 | 1.63 | 0.23 | 0.03 | 0.27 | 0.31 | 0.04 | 0.00 | 0.12 | 0.12 | 0.93 | x | 0.93 | 4.80 | a | |||||||||||
2001 | 0.56 | 0.79 | 0.86 | 0.47 | 0.06 | 1.13 | ----- | z | 0.13 | 0.00 | 0.33 | 2.20 | 1.76 | 8.29 | a | |||||||||||
2002 | 0.90 | 1.04 | 0.41 | 1.52 | 0.22 | b | 0.05 | 0.05 | 0.00 | 0.23 | 0.00 | 0.53 | 2.85 | 7.80 | ||||||||||||
2003 | 2.39 | 0.29 | 0.55 | 0.78 | 0.00 | c | 0.43 | ----- | z | 0.06 | 0.00 | 0.76 | 0.60 | 1.52 | u | 5.86 | b | |||||||||
2004 | 1.03 | t | 1.54 | 0.63 | ----- | z | 1.44 | 0.09 | 0.38 | 0.42 | b | 0.21 | 0.72 | 0.15 | 0.98 | 6.56 | b | |||||||||
2005 | 1.74 | 0.33 | ----- | z | 0.00 | b | 1.79 | 0.34 | 0.17 | 0.01 | 0.04 | 0.45 | ----- | z | 1.93 | 6.80 | b | |||||||||
2006 | 1.98 | 0.94 | 0.65 | b | 0.63 | 1.12 | 0.89 | 0.00 | 0.00 | 0.09 | 0.43 | 3.04 | 3.16 | 12.93 | ||||||||||||
2007 | 0.30 | 1.38 | 0.15 | 0.02 | 0.31 | 0.06 | 0.16 | 0.05 | 0.00 | 0.34 | a | 0.78 | 1.81 | a | 5.36 | |||||||||||
2008 | 0.94 | 1.00 | 0.31 | 0.18 | 0.11 | 0.18 | 0.00 | 0.18 | 0.12 | 0.46 | 1.87 | 1.18 | 6.53 | |||||||||||||
2009 | 1.14 | 0.42 | 1.14 | 0.31 | 0.35 | 0.48 | 0.19 | 0.00 | 0.28 | 1.22 | 0.76 | 0.48 | 6.77 | |||||||||||||
2010 | 1.99 | 1.49 | 0.28 | 0.97 | 1.51 | 1.30 | 0.89 | 0.06 | 0.94 | 0.29 | 1.02 | 2.06 | 12.80 | |||||||||||||
2011 | 0.88 | 0.30 | 2.13 | 0.02 | 1.94 | 0.58 | 0.40 | 0.00 | 0.02 | 0.75 | 0.49 | 0.53 | 8.04 | |||||||||||||
2012 | 1.36 | 0.74 | 1.17 | 0.96 | 0.39 | 0.60 | 0.15 | 0.00 | 0.09 | 1.73 | 0.91 | 1.94 | a | 10.04 | ||||||||||||
2013 | 0.36 | 0.04 | 0.83 | 0.77 | 1.27 | 0.86 | 0.01 | 0.59 | 0.68 | 0.14 | 0.47 | 0.19 | 6.21 | |||||||||||||
2014 | 0.56 | 1.29 | 0.78 | 0.17 | 0.22 | 0.32 | 0.14 | 0.81 | 0.18 | 1.28 | 0.89 | 2.24 | 8.88 | |||||||||||||
2015 | 1.03 | 0.87 | 0.76 | 0.21 | 1.45 | 0.03 | 0.08 | 0.01 | 0.51 | 0.48 | 1.33 | 3.59 | 10.35 | |||||||||||||
2016 | 2.42 | 0.40 | 2.49 | 0.51 | 0.88 | 0.41 | 0.30 | 0.00 | 0.04 | 2.02 | 0.39 | 0.60 | 10.46 | |||||||||||||
2017 | 1.84 | 1.71 | 1.46 | 1.69 | 0.80 | 0.10 | 0.00 | 0.03 | 0.01 | 1.32 | 1.56 | 1.11 | 11.63 | |||||||||||||
2018 | 1.29 | 0.29 | 0.53 | 1.10 | 0.74 | 0.31 | 0.00 | 0.02 | 0.00 | 1.33 | 0.40 | 1.26 | 7.27 | |||||||||||||
2019 | 1.12 | 1.34 | 0.42 | 0.55 | 0.60 | 1.11 | 0.09 | 0.71 | 2.33 | 0.47 | 0.11 | 0.85 | 9.70 | |||||||||||||
2020 | 1.38 | 0.17 | 0.33 | 0.10 | 0.33 | b | 0.23 | 0.00 | 0.00 | 0.33 | 1.11 | a | 1.09 | a | 1.07 | b | 6.14 | |||||||||
2021 | 2.12 | a | 1.18 | b | 0.25 | a | 0.09 | a | 0.18 | 0.21 | 0.00 | 0.17 | 0.14 | 0.56 | a | 1.55 | a | 0.93 | c | 7.38 | ||||||
2022 | 1.86 | b | 0.54 | b | 0.37 | b | 1.16 | b | 0.72 | f | 0.93 | 0.09 | e | 0.00 | 0.04 | 0.03 | f | 2.21 | f | 2.02 | f | 4.99 | d | |||
2023 | 1.45 | d | 0.72 | f | 0.48 | a | 0.08 | ----- | z | 0.07 | 0.00 | 0.92 | 0.26 | 0.56 | 1.51 | e | 1.48 | b | 6.81 | b | ||||||
2024 | 1.79 | 1.35 | a | 0.64 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 3.78 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.29 | 0.90 | 0.66 | 0.53 | 0.61 | 0.66 | 0.19 | 0.35 | 0.36 | 0.64 | 1.18 | 1.47 | 8.84 | |||||||||||||
S.D. | 0.70 | 0.60 | 0.54 | 0.54 | 0.61 | 0.76 | 0.28 | 0.57 | 0.50 | 0.59 | 0.79 | 0.96 | 2.28 | |||||||||||||
SKEW | 0.49 | 0.40 | 1.43 | 1.83 | 1.57 | 2.52 | 2.37 | 2.47 | 1.99 | 0.97 | 1.29 | 0.94 | 0.31 | |||||||||||||
MAX | 3.32 | 2.62 | 2.49 | 3.24 | 3.23 | 4.58 | 1.40 | 3.09 | 2.33 | 2.21 | 4.45 | 4.91 | 14.57 | |||||||||||||
MIN | 0.08 | 0.02 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.08 | 4.82 | |||||||||||||
YRS | 92 | 90 | 91 | 90 | 89 | 91 | 86 | 91 | 92 | 89 | 87 | 89 | 76 |