YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1925 | ----- | z | ----- | z | ----- | z | 0.73 | 5.48 | 1.30 | 3.22 | 1.96 | 2.95 | 1.19 | 0.48 | 0.15 | 17.46 | c | |||||||||
1926 | 0.10 | 0.14 | 1.52 | 3.18 | 7.91 | 2.89 | 0.66 | 1.18 | 0.70 | 0.90 | 0.00 | 0.58 | 19.76 | |||||||||||||
1927 | 0.00 | 0.19 | ----- | z | ----- | z | ----- | z | ----- | z | 1.87 | 6.75 | 0.92 | 0.16 | 0.00 | 0.08 | 9.97 | d | ||||||||
1928 | 0.00 | 0.17 | 0.77 | 0.17 | 3.49 | 3.15 | 0.72 | 5.61 | 0.20 | 2.81 | 1.33 | 0.92 | 19.34 | |||||||||||||
1929 | 0.02 | 0.28 | 1.64 | 0.00 | 2.19 | 1.39 | 2.72 | 3.57 | 0.95 | 0.75 | 0.76 | 0.12 | 14.39 | |||||||||||||
1930 | 0.34 | t | 0.00 | 0.48 | 0.39 | 1.21 | 1.14 | 1.72 | 1.64 | 1.33 | 3.61 | 0.35 | 0.10 | 11.97 | a | |||||||||||
1931 | 0.32 | 0.35 | 1.24 | 2.36 | 2.99 | 0.97 | 2.94 | 2.71 | 1.24 | 1.04 | 0.35 | 0.27 | 16.78 | |||||||||||||
1932 | 0.64 | 0.48 | 0.67 | 1.12 | 0.48 | 4.64 | 0.96 | 1.83 | 3.08 | a | 0.81 | 0.00 | 0.78 | 15.49 | ||||||||||||
1933 | 0.00 | 0.15 | 0.00 | 0.50 | 0.20 | 0.52 | 0.77 | 6.11 | 0.14 | 0.64 | 0.25 | 0.10 | 9.38 | |||||||||||||
1934 | 0.05 | 0.41 | 0.11 | 0.10 | 1.47 | 0.77 | 0.81 | 0.60 | 1.12 | 0.97 | 0.27 | 0.02 | q | 6.68 | a | |||||||||||
1935 | 0.65 | 0.00 | 0.25 | 0.00 | 2.87 | 1.19 | 0.18 | 3.23 | 1.73 | 0.38 | 0.70 | 0.20 | 11.38 | |||||||||||||
1936 | 0.48 | b | 0.00 | 0.00 | 0.00 | 3.01 | 2.48 | 0.95 | 0.61 | 0.95 | 0.00 | 0.00 | 0.85 | 9.33 | ||||||||||||
1937 | 0.25 | 0.10 | 0.57 | 0.63 | 3.34 | 1.49 | 1.27 | 0.34 | 2.96 | a | 0.55 | 0.05 | 0.70 | 12.25 | ||||||||||||
1938 | 0.00 | 1.44 | 0.38 | 1.92 | 2.64 | 1.16 | 1.21 | 0.10 | 2.65 | ----- | z | 0.00 | 1.30 | 12.80 | a | |||||||||||
1939 | 1.70 | 0.67 | 0.50 | 1.51 | 0.60 | 1.87 | 1.35 | 1.33 | 0.97 | 0.28 | 0.60 | 1.47 | 12.85 | |||||||||||||
1940 | 0.30 | c | 0.87 | 0.14 | 1.20 | 1.37 | 0.44 | 0.41 | 3.25 | 1.75 | 0.00 | 2.95 | 0.17 | 12.85 | ||||||||||||
1941 | 0.47 | 0.40 | 1.69 | 4.30 | s | 9.45 | 3.78 | 4.50 | 2.78 | 6.81 | 3.31 | 0.00 | 0.42 | a | 33.61 | a | ||||||||||
1942 | 0.07 | 0.15 | 0.59 | 5.46 | 0.00 | 3.23 | 1.52 | 2.87 | 2.96 | 2.50 | 0.00 | 0.53 | 19.88 | |||||||||||||
1943 | 0.25 | 0.00 | 0.15 | 0.41 | 1.42 | 0.75 | 0.92 | 1.80 | 0.10 | 0.00 | 0.60 | 2.70 | a | 9.10 | ||||||||||||
1944 | 0.80 | 0.40 | 0.20 | 3.43 | w | 3.03 | 0.52 | 2.97 | 4.24 | b | 1.41 | 0.79 | 0.95 | 1.05 | 16.36 | a | ||||||||||
1945 | 1.45 | 0.29 | 0.15 | 1.02 | u | 0.36 | 0.68 | 2.60 | 1.80 | 2.23 | 0.25 | 0.00 | 0.10 | a | 9.91 | a | ||||||||||
1946 | 0.15 | 0.30 | 0.52 | 1.64 | 2.83 | 0.26 | 1.12 | 4.47 | 2.77 | 1.87 | 1.20 | y | 0.05 | 15.98 | a | |||||||||||
1947 | 0.55 | 0.22 | 0.67 | 0.90 | 5.86 | 0.80 | 2.04 | 3.03 | 0.00 | 0.00 | 0.79 | 1.55 | 16.41 | |||||||||||||
1948 | 0.65 | 1.49 | 1.13 | 0.10 | 3.40 | 1.07 | 3.67 | 2.49 | 0.00 | 1.49 | 0.13 | 0.03 | 15.65 | |||||||||||||
1949 | 1.25 | 1.09 | 0.98 | 3.45 | 1.85 | 3.32 | 2.36 | 2.12 | 1.62 | 0.00 | 0.00 | 0.42 | 18.46 | |||||||||||||
1950 | 0.07 | 0.00 | 0.10 | 0.54 | 0.81 | 2.75 | 3.29 | a | 3.02 | 2.52 | 0.00 | a | 0.00 | 0.20 | 13.30 | |||||||||||
1951 | 0.60 | 0.80 | 0.35 | a | 0.53 | a | 3.05 | 1.91 | 4.13 | 2.34 | 0.40 | 0.66 | 0.14 | 0.25 | 15.16 | |||||||||||
1952 | 0.45 | 0.35 | 0.90 | 1.83 | 3.35 | 0.17 | 1.77 | 4.05 | 0.51 | 0.00 | 0.93 | 0.40 | 14.71 | |||||||||||||
1953 | 0.05 | 0.56 | 0.77 | 0.21 | 0.79 | 0.18 | 1.75 | 1.74 | 0.86 | 0.95 | 0.63 | a | 0.40 | 8.89 | ||||||||||||
1954 | 0.35 | 0.20 | 0.14 | 0.32 | 2.95 | 0.19 | 1.75 | 2.54 | 1.16 | 1.72 | 0.04 | 0.05 | 11.41 | |||||||||||||
1955 | 0.06 | 0.25 | 0.23 | 1.99 | 4.92 | 0.15 | 1.83 | 1.32 | 1.60 | 0.00 | 0.05 | 0.03 | 12.43 | |||||||||||||
1956 | 0.10 | 0.10 | 0.03 | 0.50 | 3.90 | 1.61 | a | 2.65 | 1.82 | 0.00 | 0.31 | 0.10 | 0.00 | 11.12 | ||||||||||||
1957 | 0.32 | 0.05 | 2.18 | 1.29 | 2.51 | 0.35 | 3.25 | 2.50 | 0.44 | 2.25 | 1.00 | 0.00 | a | 16.14 | ||||||||||||
1958 | 0.37 | 0.96 | 3.71 | 1.29 | 1.34 | 1.68 | 7.55 | 1.83 | 1.57 | 0.49 | 1.30 | 0.74 | 22.83 | |||||||||||||
1959 | 0.50 | 0.09 | 0.70 | 0.66 | 3.19 | 2.42 | 2.40 | 4.53 | 0.23 | 2.09 | 0.10 | 2.26 | 19.17 | |||||||||||||
1960 | 1.26 | a | 0.71 | a | 0.64 | 0.10 | 0.60 | 4.90 | 6.35 | 1.82 | 3.36 | 4.58 | 0.00 | 1.04 | 25.36 | |||||||||||
1961 | 0.08 | 0.19 | 1.46 | 0.80 | 0.25 | 1.08 | 1.66 | 2.61 | 3.86 | 1.32 | 1.70 | 0.20 | 15.21 | |||||||||||||
1962 | 0.50 | 0.05 | 0.19 | 0.33 | 1.57 | 4.41 | 6.20 | 0.24 | 0.94 | 0.14 | 0.30 | 0.27 | 15.14 | |||||||||||||
1963 | 0.14 | 0.50 | 0.00 | 0.36 | 3.14 | 2.42 | 1.87 | 4.12 | 0.28 | 0.29 | 0.45 | 0.16 | 13.73 | |||||||||||||
1964 | 0.00 | 0.15 | b | 0.25 | 0.53 | 1.40 | 0.67 | 0.91 | 3.27 | 3.40 | 0.00 | 1.48 | 0.51 | 12.57 | ||||||||||||
1965 | 0.05 | 0.13 | 1.09 | a | 0.30 | 1.80 | 5.68 | 1.83 | 1.55 | 1.91 | 1.70 | 0.00 | 0.64 | 16.68 | ||||||||||||
1966 | 0.37 | 0.17 | 0.00 | 0.25 | 1.03 | 2.00 | 3.95 | 2.01 | 0.59 | 0.36 | 0.00 | 0.38 | 11.11 | |||||||||||||
1967 | 0.03 | 0.12 | 0.04 | 0.68 | 3.11 | 4.95 | 4.39 | 1.75 | 1.62 | 0.10 | 0.21 | 0.70 | 17.70 | |||||||||||||
1968 | 0.66 | 0.30 | 0.75 | 0.73 | 1.54 | 0.39 | 4.98 | 1.53 | 0.17 | 0.40 | 0.55 | 0.20 | 12.20 | |||||||||||||
1969 | 0.00 | 0.88 | 1.07 | 1.74 | 3.33 | 3.80 | 3.08 | 4.34 | 2.59 | 1.92 | 0.64 | 0.82 | 24.21 | |||||||||||||
1970 | 0.02 | 0.00 | 0.49 | 2.37 | 0.83 | 0.25 | 5.10 | 0.74 | 2.17 | 1.67 | 0.17 | 0.00 | 13.81 | |||||||||||||
1971 | 0.10 | 0.22 | 0.05 | 1.52 | 1.65 | 1.32 | 3.00 | 5.29 | 2.18 | 1.94 | 1.71 | 0.87 | 19.85 | |||||||||||||
1972 | 0.00 | 0.05 | 0.00 | 0.13 | 5.63 | 1.77 | 5.38 | 5.03 | 3.75 | 1.58 | 1.34 | 0.10 | 24.76 | |||||||||||||
1973 | 0.27 | 0.28 | 1.50 | 1.31 | 0.85 | 1.03 | 3.88 | 1.03 | 1.07 | 0.92 | 0.04 | 0.58 | 12.76 | |||||||||||||
1974 | 0.49 | 0.02 | 0.67 | 0.58 | 0.80 | 0.77 | 1.57 | 4.97 | 1.03 | 2.09 | 0.16 | 0.41 | 13.56 | |||||||||||||
1975 | 0.40 | 0.28 | 0.28 | 0.58 | 1.46 | 2.52 | 3.42 | 1.72 | 1.66 | 0.00 | 0.79 | 0.04 | 13.15 | |||||||||||||
1976 | 0.05 | 0.00 | 0.24 | 0.57 | 3.24 | 1.39 | 3.39 | 2.57 | 3.53 | 0.25 | 0.24 | 0.00 | 15.47 | |||||||||||||
1977 | 0.28 | 0.06 | 0.28 | 1.66 | 0.80 | 2.73 | 1.37 | 1.76 | 2.03 | 0.11 | 0.14 | 0.23 | 11.45 | |||||||||||||
1978 | 0.39 | 0.60 | 0.04 | 0.13 | 2.59 | 2.01 | 1.05 | 3.63 | 0.82 | 0.20 | 3.20 | 0.50 | 15.16 | |||||||||||||
1979 | 0.41 | 0.00 | 1.59 | 0.82 | 2.00 | 2.00 | 3.40 | 1.65 | 0.91 | 0.37 | 0.25 | 0.25 | 13.65 | |||||||||||||
1980 | 0.44 | 0.08 | 0.25 | 2.71 | 2.57 | 0.37 | 0.18 | 2.21 | 1.02 | 0.16 | 0.18 | 0.05 | 10.22 | |||||||||||||
1981 | 0.00 | 0.00 | 1.47 | 1.01 | 1.73 | 1.00 | 2.87 | 6.42 | 2.10 | 0.47 | 0.43 | 0.11 | 17.61 | |||||||||||||
1982 | 0.00 | b | 0.27 | 0.23 | 0.25 | 1.81 | 2.45 | 8.36 | 2.67 | 2.94 | 0.35 | 0.56 | 0.58 | 20.47 | ||||||||||||
1983 | 0.68 | 0.75 | 0.77 | 0.15 | 1.24 | b | 0.71 | 0.77 | 0.66 | 0.13 | 1.34 | 0.32 | 0.65 | 8.17 | ||||||||||||
1984 | 0.24 | a | 0.19 | a | 1.09 | 1.49 | 0.99 | 1.28 | 1.75 | 3.54 | 0.65 | 3.23 | 0.36 | 0.33 | 15.14 | |||||||||||
1985 | ----- | z | 0.58 | 2.06 | 1.57 | 2.32 | 1.49 | 1.37 | 4.10 | 4.21 | 2.65 | 0.31 | a | 0.00 | 20.66 | a | ||||||||||
1986 | 0.00 | 0.41 | 0.16 | 0.47 | 3.55 | a | 2.58 | 0.76 | 1.65 | 2.23 | 3.11 | 1.93 | 0.44 | 17.29 | ||||||||||||
1987 | 0.38 | 1.28 | 0.36 | 0.25 | 3.68 | 1.49 | 0.10 | a | 2.00 | 0.95 | 0.00 | 0.92 | 1.20 | 12.61 | ||||||||||||
1988 | 0.14 | 0.02 | 0.45 | 0.58 | a | 3.21 | 3.62 | 2.40 | 0.72 | 3.11 | 0.58 | 0.00 | a | 0.00 | a | 14.83 | ||||||||||
1989 | 0.37 | 0.57 | 0.00 | 0.00 | 1.16 | 3.46 | 1.69 | a | 2.10 | c | 1.15 | 0.00 | 0.00 | 0.00 | 10.50 | |||||||||||
1990 | 0.55 | 0.92 | 0.97 | 0.21 | a | 0.92 | 0.00 | 2.68 | a | 2.95 | 2.75 | 0.09 | 1.40 | a | 0.11 | b | 13.55 | |||||||||
1991 | 0.85 | 0.00 | 1.50 | b | 0.12 | 4.30 | b | 2.28 | 4.56 | ----- | z | ----- | z | 0.00 | k | 1.27 | 1.61 | 16.49 | c | |||||||
1992 | 0.70 | 0.73 | a | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.55 | 1.98 | i | ||
1993 | 0.57 | a | 0.57 | 1.26 | 0.56 | 2.69 | 5.37 | 2.26 | 1.60 | 0.15 | 0.30 | 0.38 | ----- | z | 15.71 | a | ||||||||||
1994 | 0.25 | 0.00 | 0.56 | 1.43 | 2.82 | 0.91 | 3.18 | 3.46 | 0.33 | 1.66 | 0.44 | 0.43 | 15.47 | |||||||||||||
1995 | 0.29 | 0.02 | 0.32 | a | 0.86 | 2.93 | 4.06 | 3.55 | 0.81 | 1.10 | 0.16 | 0.06 | 0.41 | 14.57 | ||||||||||||
1996 | 0.08 | 0.04 | 0.08 | 0.00 | 2.21 | 2.30 | 3.90 | 2.93 | 2.03 | 0.47 | 0.42 | 0.35 | 14.81 | |||||||||||||
1997 | 0.18 | 0.34 | 0.08 | 3.31 | 0.74 | 2.10 | 2.04 | 6.10 | 0.89 | 1.97 | 0.42 | 1.05 | 19.22 | |||||||||||||
1998 | 0.00 | 1.02 | 1.51 | 0.97 | a | 0.95 | 0.01 | 5.18 | 3.82 | 0.15 | a | 2.96 | 0.39 | 0.08 | 17.04 | |||||||||||
1999 | 0.36 | 0.00 | 0.58 | 1.86 | 4.71 | 2.09 | a | 1.84 | 1.26 | 1.38 | 1.29 | 0.01 | 0.04 | 15.42 | ||||||||||||
2000 | 0.10 | 0.05 | 2.61 | 0.49 | 0.62 | 2.48 | 1.81 | 1.30 | 0.12 | 6.17 | 0.14 | 0.32 | b | 16.21 | ||||||||||||
2001 | 0.81 | 0.23 | a | 1.45 | 0.28 | 2.46 | 1.97 | 0.79 | 3.60 | 1.57 | 0.00 | 1.39 | 0.57 | 15.12 | ||||||||||||
2002 | 0.34 | 0.12 | 0.00 | 1.43 | 0.30 | 0.93 | 2.63 | 2.10 | 4.68 | 2.87 | 0.73 | 0.67 | 16.80 | |||||||||||||
2003 | 0.00 | 0.25 | 0.59 | 0.43 | 0.53 | 2.68 | 0.02 | 0.76 | 1.39 | 0.23 | 0.75 | a | 0.02 | 7.65 | ||||||||||||
2004 | 0.07 | 0.22 | 0.89 | 1.83 | a | 0.24 | f | 3.66 | 4.27 | 5.10 | 3.60 | 0.56 | g | 2.24 | 0.35 | 22.23 | b | |||||||||
2005 | 2.00 | 0.82 | 1.78 | a | 2.05 | 3.36 | 0.56 | 0.02 | 5.06 | 2.67 | 0.61 | 0.04 | 0.00 | 18.97 | ||||||||||||
2006 | 0.03 | 0.00 | 0.86 | b | 0.58 | 0.60 | 1.85 | 2.62 | a | 4.44 | a | 3.57 | b | 0.69 | 0.02 | 1.07 | 16.33 | |||||||||
2007 | 0.46 | 0.30 | 2.90 | 0.56 | 2.13 | a | 1.53 | 1.14 | 2.29 | 1.29 | b | 0.49 | 0.21 | b | 0.52 | 13.82 | ||||||||||
2008 | 0.01 | 0.68 | 0.21 | 0.14 | 1.79 | 0.30 | 1.93 | 4.38 | 0.42 | 3.46 | 0.06 | 0.23 | 13.61 | |||||||||||||
2009 | 0.00 | 0.77 | 0.32 | 0.78 | 0.63 | b | 0.91 | 4.12 | 2.45 | 0.98 | 2.23 | 0.01 | e | 0.08 | 13.28 | |||||||||||
2010 | 0.60 | 1.08 | 1.38 | 0.85 | 1.38 | 3.14 | 3.26 | 2.81 | 1.09 | 1.52 | 0.03 | 0.31 | 17.45 | |||||||||||||
2011 | 0.00 | 0.05 | x | ----- | z | ----- | z | ----- | z | ----- | z | 1.93 | x | 2.60 | r | 1.28 | v | ----- | z | ----- | z | 1.57 | y | 0.00 | k | |
2012 | 0.00 | ----- | z | ----- | z | 1.05 | v | 2.10 | 2.83 | 0.06 | 1.39 | 0.58 | 1.07 | ----- | z | ----- | z | 8.03 | e | |||||||
2013 | 0.26 | 0.66 | ----- | z | 0.00 | 0.48 | 1.54 | 2.56 | 0.79 | 4.41 | 0.00 | 0.56 | 0.18 | 11.44 | a | |||||||||||
2014 | 0.01 | 0.04 | 0.06 | 0.29 | 1.70 | 2.60 | 1.53 | 1.26 | 3.11 | 0.94 | 0.78 | 0.34 | 12.66 | |||||||||||||
2015 | 1.23 | a | 0.68 | 0.32 | 1.01 | 4.19 | 1.08 | 4.06 | 3.60 | 2.55 | 4.31 | 1.27 | 0.35 | 24.65 | ||||||||||||
2016 | 0.05 | 0.17 | 0.40 | 0.99 | 1.82 | 3.04 | 2.70 | 1.02 | 1.83 | 0.00 | 2.06 | 0.63 | 14.71 | |||||||||||||
2017 | 1.25 | 0.00 | 0.64 | 2.59 | 2.40 | 1.21 | 3.19 | 6.04 | 3.20 | 5.13 | 0.00 | 0.10 | 25.75 | |||||||||||||
2018 | 0.00 | 0.00 | 0.24 | 0.90 | 1.62 | g | 1.19 | 3.21 | 3.38 | 0.99 | 4.62 | 0.03 | 0.01 | 14.57 | a | |||||||||||
2019 | 0.08 | 0.00 | 1.19 | 0.71 | 1.70 | 0.64 | 2.72 | 3.21 | 1.95 | 0.95 | 0.53 | 0.89 | 14.57 | |||||||||||||
2020 | 0.31 | 0.12 | 0.28 | 0.20 | 0.33 | 0.27 | 3.12 | 0.18 | 0.52 | 0.84 | 0.16 | 0.20 | 6.53 | |||||||||||||
2021 | 0.52 | 0.11 | 1.30 | 0.07 | 2.14 | 1.85 | 0.71 | 0.99 | 0.50 | 0.45 | 0.00 | 0.00 | 8.64 | |||||||||||||
2022 | 0.04 | 0.09 | 0.21 | 0.18 | 1.67 | 1.73 | 3.66 | 1.49 | 0.01 | 0.85 | ----- | z | 0.00 | 9.93 | a | |||||||||||
2023 | 0.00 | 0.10 | 0.08 | 0.38 | e | 3.11 | 4.13 | 0.36 | 0.42 | 0.93 | 0.76 | l | 0.32 | 1.09 | 10.92 | a | ||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.34 | 0.33 | 0.70 | 0.92 | 2.25 | 1.84 | 2.48 | 2.61 | 1.65 | 1.19 | 0.53 | 0.45 | 15.06 | |||||||||||||
S.D. | 0.40 | 0.35 | 0.70 | 0.93 | 1.62 | 1.33 | 1.64 | 1.58 | 1.29 | 1.32 | 0.65 | 0.49 | 4.12 | |||||||||||||
SKEW | 1.83 | 1.29 | 1.60 | 1.98 | 1.58 | 0.84 | 0.96 | 0.66 | 1.05 | 1.52 | 1.89 | 1.98 | 0.58 | |||||||||||||
MAX | 2.00 | 1.49 | 3.71 | 5.46 | 9.45 | 5.68 | 8.36 | 6.75 | 6.81 | 6.17 | 3.20 | 2.70 | 25.75 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 6.53 | |||||||||||||
YRS | 96 | 96 | 93 | 92 | 94 | 96 | 97 | 96 | 96 | 93 | 94 | 95 | 79 |