YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.92 | 1.97 | w | 1.92 | k | |
1938 | 1.40 | 0.86 | 2.36 | 0.82 | 0.79 | 0.60 | 0.26 | 0.04 | ----- | z | ----- | z | ----- | z | 0.64 | 7.77 | c | |||||||||
1939 | 0.79 | 1.04 | 0.65 | 0.07 | 0.05 | 0.07 | 0.14 | 0.00 | 1.23 | 0.59 | 0.10 | 1.12 | 5.85 | |||||||||||||
1940 | 2.04 | 1.97 | 1.77 | 1.37 | 0.04 | 0.02 | 0.04 | 0.00 | 2.76 | 2.45 | 0.95 | 0.58 | 13.99 | |||||||||||||
1941 | 1.38 | 1.66 | 0.31 | 1.16 | 1.61 | 2.38 | 0.24 | 1.99 | 0.21 | 1.10 | 0.82 | 1.42 | 14.28 | |||||||||||||
1942 | 1.41 | 2.40 | 0.12 | 0.63 | 1.73 | 0.59 | 0.03 | 0.74 | 0.38 | 0.44 | 3.25 | 2.48 | 14.20 | |||||||||||||
1943 | 2.23 | 0.50 | 1.03 | 1.25 | 0.65 | 1.01 | 0.16 | 0.08 | 0.00 | 2.32 | 0.44 | 0.66 | 10.33 | |||||||||||||
1944 | 0.66 | 1.06 | 0.44 | 1.56 | 0.39 | 1.78 | 0.13 | 0.00 | 0.18 | 0.20 | 2.01 | 1.46 | 9.87 | |||||||||||||
1945 | 1.06 | 1.74 | 2.06 | 0.20 | 1.83 | 0.28 | 0.08 | 0.07 | 1.19 | 0.73 | 1.70 | 2.46 | 13.40 | |||||||||||||
1946 | 1.06 | 0.89 | 1.32 | 0.24 | a | 1.34 | 0.19 | 0.13 | 0.04 | 0.31 | 1.09 | 1.48 | 0.61 | 8.70 | ||||||||||||
1947 | 0.31 | 0.73 | 0.60 | 0.47 | 0.92 | 2.77 | 0.00 | 0.05 | 0.62 | 0.78 | 0.97 | 0.25 | 8.47 | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.23 | 0.19 | 0.48 | 0.82 | 1.04 | 2.76 | g | |||||
1949 | 0.15 | 0.18 | 0.20 | 0.31 | 0.77 | 0.30 | 0.00 | 0.00 | a | 0.01 | 0.46 | a | 1.08 | 0.24 | 3.70 | |||||||||||
1950 | 1.67 | 1.13 | 1.64 | a | 0.20 | 0.39 | 0.91 | 0.20 | 0.00 | a | 0.52 | 0.17 | 1.01 | 1.88 | 9.72 | |||||||||||
1951 | 1.13 | a | 1.61 | 0.53 | 1.01 | b | 0.79 | a | 0.42 | 0.02 | 0.45 | 0.01 | a | 1.23 | a | 1.24 | 2.34 | 10.78 | ||||||||
1952 | 0.82 | a | 1.03 | 0.49 | 0.72 | 0.63 | 1.75 | a | 0.01 | 0.00 | 0.30 | 0.00 | 0.81 | 0.93 | 7.49 | |||||||||||
1953 | 1.13 | 1.44 | 0.54 | 0.57 | 1.75 | b | 1.48 | 0.00 | a | 0.10 | 0.00 | 0.32 | 0.78 | a | 1.17 | 9.28 | ||||||||||
1954 | 0.50 | 0.37 | 0.70 | 0.55 | 0.48 | 1.37 | a | 0.00 | 0.15 | 0.28 | 0.28 | 1.29 | a | 1.13 | 7.10 | |||||||||||
1955 | 0.82 | a | 0.39 | 0.29 | a | 1.54 | 0.51 | 0.76 | 0.20 | 0.00 | 0.44 | 0.59 | 1.26 | 1.85 | 8.65 | |||||||||||
1956 | 2.17 | 0.14 | 0.15 | 0.55 | 1.59 | 0.52 | 0.00 | 0.46 | 0.03 | 3.12 | 0.20 | 0.50 | 9.43 | |||||||||||||
1957 | 1.41 | 1.27 | 2.37 | 0.91 | 3.79 | 0.30 | 0.02 | a | 0.03 | 0.02 | 1.12 | 0.64 | 2.05 | 13.93 | ||||||||||||
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.77 | a | ----- | z | 0.77 | k |
1962 | 1.44 | 1.54 | 0.73 | 0.66 | 1.73 | 0.10 | 0.02 | 0.15 | 0.49 | 2.10 | 1.01 | 1.21 | 11.18 | |||||||||||||
1963 | 0.50 | 1.18 | 0.16 | 1.93 | 0.75 | 1.71 | 0.05 | 0.54 | 0.93 | 1.09 | 1.49 | 1.16 | 11.49 | |||||||||||||
1964 | 1.72 | 0.11 | 0.69 | 1.28 | 1.36 | 2.17 | 0.16 | 0.41 | 0.53 | 0.30 | 1.46 | 2.68 | 12.87 | |||||||||||||
1965 | 1.99 | 0.05 | 0.21 | 0.81 | 0.43 | 1.73 | 0.40 | 1.09 | 0.38 | 0.27 | 2.13 | 0.19 | 9.68 | |||||||||||||
1966 | 0.31 | 0.42 | 0.70 | 0.22 | 0.17 | 0.32 | 0.00 | 0.14 | 0.32 | 0.58 | 1.40 | 1.21 | 5.79 | |||||||||||||
1967 | 1.22 | 0.06 | 0.69 | 1.48 | 1.09 | 1.86 | 0.01 | 0.00 | 0.44 | 0.88 | 0.48 | 0.37 | 8.58 | |||||||||||||
1968 | 0.59 | 1.82 | 0.71 | 0.15 | 0.80 | 0.21 | 0.00 | 2.41 | 0.06 | 0.40 | 2.14 | 1.68 | 10.97 | |||||||||||||
1969 | 2.74 | 1.31 | 0.21 | 1.10 | 1.01 | 0.83 | 0.00 | 0.00 | 0.16 | 1.20 | 0.23 | 1.71 | 10.50 | |||||||||||||
1970 | 3.76 | 0.66 | 0.46 | 0.16 | 0.63 | 1.57 | 0.55 | 0.00 | 1.34 | 1.53 | 2.35 | 1.81 | 14.82 | |||||||||||||
1971 | 1.59 | 0.30 | 1.44 | 0.26 | 0.02 | 0.90 | 0.02 | 0.02 | 0.32 | 0.47 | 1.89 | 1.00 | 8.23 | |||||||||||||
1972 | 1.10 | 0.78 | 0.78 | 0.28 | 0.12 | 1.11 | 0.13 | 0.28 | 0.31 | 0.39 | 0.88 | 2.71 | 8.87 | |||||||||||||
1973 | 1.19 | 0.51 | 0.76 | 0.23 | 0.81 | 0.15 | 0.26 | 0.04 | 0.65 | 0.35 | 1.94 | 1.77 | 8.66 | |||||||||||||
1974 | 0.92 | 0.70 | 1.02 | 0.22 | 0.29 | 0.19 | 0.73 | 0.00 | 0.00 | 0.83 | 0.53 | 1.11 | 6.54 | |||||||||||||
1975 | 0.66 | 1.88 | 1.47 | 1.33 | 0.07 | 1.37 | 0.28 | 0.71 | 0.00 | 1.67 | 0.50 | 1.67 | 11.61 | |||||||||||||
1976 | 1.32 | 1.57 | 0.83 | 0.86 | 0.04 | 0.45 | 0.74 | 1.20 | 1.96 | 0.08 | 0.28 | 0.08 | 9.41 | |||||||||||||
1977 | 1.06 | 0.23 | 0.38 | 0.19 | 1.95 | 0.17 | 0.33 | 0.77 | 1.07 | 0.11 | 1.88 | 1.53 | 9.67 | |||||||||||||
1978 | 2.23 | 1.72 | 0.62 | 3.39 | 0.18 | 0.34 | 0.42 | 0.32 | 0.58 | 0.00 | 0.69 | 0.84 | 11.33 | |||||||||||||
1979 | 2.01 | 1.07 | 1.02 | 0.66 | 0.86 | 0.39 | 0.00 | 1.88 | 0.14 | 1.21 | 1.16 | 0.79 | 11.19 | |||||||||||||
1980 | 1.46 | 1.97 | 1.18 | 0.42 | 1.20 | 0.90 | 0.56 | 0.05 | 2.11 | 0.15 | 1.20 | 1.73 | 12.93 | |||||||||||||
1981 | 0.90 | 1.42 | 2.08 | 1.20 | 1.15 | 1.23 | 0.37 | 0.09 | 0.68 | 0.76 | 2.61 | 2.99 | 15.48 | |||||||||||||
1982 | 0.39 | 1.35 | 0.65 | 0.51 | 0.37 | 1.04 | 0.56 | 0.52 | 0.79 | 1.99 | 0.91 | 2.80 | 11.88 | |||||||||||||
1983 | 1.55 | 1.08 | 2.27 | 0.95 | 0.60 | 0.53 | 0.74 | 0.96 | 0.10 | 0.58 | 2.17 | 4.69 | 16.22 | |||||||||||||
1984 | 0.47 | 0.73 | 1.16 | 0.80 | 1.49 | 1.94 | 0.10 | 0.52 | 0.11 | 0.44 | 1.66 | 0.79 | 10.21 | |||||||||||||
1985 | 0.08 | 0.61 | 0.67 | 0.59 | 0.87 | 0.45 | 0.31 | 0.22 | 1.38 | 0.61 | 0.98 | 1.11 | 7.88 | |||||||||||||
1986 | 1.28 | 3.53 | 1.30 | 0.85 | 0.56 | 0.24 | 0.01 | 0.12 | 2.09 | 0.25 | 0.39 | 0.32 | 10.94 | |||||||||||||
1987 | 1.32 | 1.10 | 1.20 | 0.17 | 1.40 | 1.33 | 0.25 | 0.48 | 0.00 | 0.00 | 1.46 | 1.33 | 10.04 | |||||||||||||
1988 | 0.96 | 0.09 | 0.54 | 0.93 | 0.92 | 0.92 | 0.09 | 0.00 | 0.05 | 0.00 | 2.15 | 1.42 | 8.07 | |||||||||||||
1989 | 0.96 | 1.60 | 1.96 | 0.64 | 1.05 | 1.40 | 0.04 | 0.74 | 0.79 | 0.66 | 0.24 | 0.05 | 10.13 | |||||||||||||
1990 | 0.59 | 0.29 | 0.39 | 1.18 | 1.40 | 0.38 | 0.04 | 0.61 | 0.10 | 0.43 | 0.61 | 0.41 | 6.43 | |||||||||||||
1991 | 0.66 | 0.45 | 0.42 | 0.71 | a | 2.05 | 1.09 | 0.13 | 0.03 | 0.31 | 1.33 | 1.63 | 0.69 | 9.50 | ||||||||||||
1992 | 0.53 | 1.33 | 0.23 | 0.49 | 0.22 | 1.40 | 0.48 | 0.00 | 0.01 | 1.01 | 1.46 | 1.37 | 8.53 | |||||||||||||
1993 | 2.64 | 0.92 | 2.59 | 2.40 | 1.94 | 1.65 | 0.22 | 0.30 | 0.00 | 0.29 | 0.88 | 0.64 | 14.47 | |||||||||||||
1994 | 1.44 | 0.57 | 0.10 | 0.63 | 1.46 | 0.06 | 0.17 | 0.00 | 0.25 | 1.04 | 2.37 | 1.23 | 9.32 | |||||||||||||
1995 | 2.05 | 0.33 | 1.56 | 1.39 | 2.43 | 1.47 | 0.69 | 0.11 | 0.12 | 0.64 | 0.93 | 2.57 | 14.29 | |||||||||||||
1996 | 1.23 | 0.99 | 1.06 | 1.23 | 2.69 | 0.19 | 0.24 | 0.00 | 0.83 | 0.82 | 1.33 | 2.52 | 13.13 | |||||||||||||
1997 | 2.31 | 0.32 | 0.24 | 0.85 | 0.59 | 0.97 | 1.91 | a | 0.53 | 0.28 | 0.32 | 1.44 | 0.87 | b | 10.63 | |||||||||||
1998 | 2.70 | 1.42 | 0.86 | 0.94 | 3.50 | 0.55 | 0.47 | 0.00 | 0.91 | 0.03 | 0.83 | 1.12 | 13.33 | |||||||||||||
1999 | 1.84 | 2.02 | 0.50 | 0.59 | 0.24 | 0.95 | 0.00 | 0.00 | 0.00 | 0.38 | 0.47 | 0.60 | 7.59 | |||||||||||||
2000 | 1.91 | 2.03 | 1.01 | 2.10 | 0.54 | 0.25 | 0.00 | 0.00 | 0.89 | 1.73 | 0.29 | 0.52 | 11.27 | |||||||||||||
2001 | 1.45 | a | 0.36 | 0.99 | 0.51 | 0.32 | 0.47 | 0.22 | 0.00 | 0.14 | 0.48 | 1.27 | 0.98 | 7.19 | ||||||||||||
2002 | 0.52 | 0.32 | 0.58 | 0.65 | 0.11 | 0.31 | 0.21 | 0.04 | a | 0.82 | a | 0.05 | 0.34 | 1.88 | 5.83 | |||||||||||
2003 | 1.61 | 0.41 | 0.87 | 0.91 | 1.58 | 0.25 | ----- | z | 0.08 | 0.09 | 0.00 | a | 0.83 | 1.62 | 8.25 | a | ||||||||||
2004 | 1.97 | 1.66 | 0.13 | 0.63 | 1.47 | 0.34 | a | 0.30 | 0.37 | 1.16 | 2.34 | 0.97 | 0.57 | 11.91 | ||||||||||||
2005 | 0.33 | 0.00 | b | 1.29 | 0.84 | 3.20 | h | 0.68 | f | 0.03 | b | 0.01 | b | 0.10 | b | 1.20 | d | 1.72 | h | 3.00 | h | 3.80 | d | |||
2006 | 1.93 | j | 0.50 | 1.46 | e | 1.23 | d | 0.91 | h | 0.89 | e | 0.05 | d | 0.08 | 0.52 | 0.37 | b | 0.70 | j | 1.48 | i | 5.10 | d | |||
2007 | 0.05 | 0.74 | d | 0.04 | 1.30 | g | 0.45 | h | 0.96 | b | 0.13 | b | 0.11 | b | 0.74 | b | 0.56 | b | 0.72 | f | 0.55 | b | 3.88 | c | ||
2008 | 0.69 | g | 0.32 | d | 0.53 | f | 0.01 | 1.90 | d | 0.75 | a | 0.24 | 0.05 | 1.37 | b | 0.48 | b | 0.84 | d | 0.76 | i | 5.96 | c | |||
2009 | 0.59 | f | 0.22 | b | 0.64 | b | 0.20 | c | 1.16 | b | 1.74 | f | 0.16 | c | 0.64 | b | 0.00 | 1.05 | g | 0.46 | f | 1.52 | c | 4.54 | d | |
2010 | 1.08 | d | 1.52 | c | 0.77 | b | 1.14 | d | 0.53 | 1.51 | 0.12 | 0.38 | a | 0.40 | 1.07 | 1.03 | 3.76 | b | 13.31 | |||||||
2011 | 0.20 | b | 0.07 | d | 2.76 | a | 0.28 | c | 1.48 | d | 0.72 | b | 0.00 | 0.00 | 0.10 | b | 0.87 | a | 0.52 | 0.39 | 7.39 | |||||
2012 | 1.48 | 0.49 | a | 1.27 | 1.18 | b | 0.91 | b | 0.39 | f | 0.03 | a | 0.00 | b | 0.07 | 1.23 | 0.97 | a | 1.03 | b | 8.66 | a | ||||
2013 | 0.35 | c | 0.09 | a | 0.33 | b | 0.13 | 0.15 | 0.74 | 0.00 | 0.05 | 2.13 | 0.65 | a | 1.02 | 0.31 | 5.95 | |||||||||
2014 | 0.19 | 0.76 | 1.13 | 0.95 | 0.43 | h | 0.31 | 0.00 | 0.78 | b | 1.02 | e | 0.53 | 0.84 | a | 2.69 | 9.20 | a | ||||||||
2015 | 1.25 | 0.59 | 0.53 | 1.04 | g | 1.70 | a | 0.07 | 0.21 | 0.00 | c | 0.06 | a | 1.39 | 1.29 | b | 2.35 | 9.44 | a | |||||||
2016 | 0.88 | a | 0.18 | 0.66 | a | 1.14 | 1.57 | e | 0.17 | a | 0.00 | e | 0.00 | a | 1.50 | 0.98 | 0.82 | 3.44 | b | 11.34 | ||||||
2017 | 2.16 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
2019 | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
2020 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.25 | 0.41 | m | 1.25 | k | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.23 | 0.93 | 0.90 | 0.82 | 1.03 | 0.84 | 0.20 | 0.30 | 0.55 | 0.78 | 1.15 | 1.38 | 10.25 | |||||||||||||
S.D. | 0.73 | 0.69 | 0.65 | 0.58 | 0.78 | 0.64 | 0.29 | 0.47 | 0.61 | 0.65 | 0.64 | 0.93 | 2.74 | |||||||||||||
SKEW | 0.72 | 0.93 | 1.06 | 1.56 | 1.15 | 0.81 | 3.33 | 2.50 | 1.53 | 1.33 | 0.77 | 1.06 | 0.06 | |||||||||||||
MAX | 3.76 | 3.53 | 2.76 | 3.39 | 3.79 | 2.77 | 1.91 | 2.41 | 2.76 | 3.12 | 3.25 | 4.69 | 16.22 | |||||||||||||
MIN | 0.05 | 0.00 | 0.04 | 0.01 | 0.02 | 0.02 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.05 | 3.70 | |||||||||||||
YRS | 71 | 74 | 73 | 72 | 70 | 71 | 73 | 75 | 74 | 73 | 73 | 72 | 64 |