YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1942 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.38 | 0.07 | ----- | z | ----- | z | 3.60 | 1.92 | s | ----- | z | |||
1943 | 2.90 | 1.76 | 1.86 | a | 1.07 | 0.46 | 0.22 | 0.37 | 0.28 | a | 0.55 | 2.40 | 0.57 | 1.56 | 2.90 | b | ||||||||||
1944 | 1.66 | 1.45 | 1.02 | 0.63 | 0.55 | 1.20 | 0.00 | 0.30 | 0.83 | 1.07 | 1.99 | 0.98 | 1.99 | |||||||||||||
1945 | 1.59 | 3.43 | 2.47 | 1.04 | 1.30 | 0.15 | 0.81 | 0.12 | 0.82 | 0.87 | 1.82 | 1.69 | 3.43 | |||||||||||||
1946 | 2.32 | 0.76 | 1.64 | 1.79 | 0.43 | 0.60 | 0.13 | 0.05 | 0.39 | 0.75 | 1.66 | 1.45 | 2.32 | |||||||||||||
1947 | 1.37 | 1.96 | 0.95 | 0.73 | 0.40 | 1.20 | m | 0.44 | 0.11 | 0.36 | 1.52 | 0.48 | 2.98 | 2.98 | m | |||||||||||
1948 | 1.06 | s | 2.11 | 3.09 | 0.86 | 0.93 | 0.24 | 0.45 | a | 0.47 | 0.71 | 0.79 | 2.26 | 2.00 | b | 3.09 | v | |||||||||
1949 | 0.54 | 3.82 | b | 0.87 | 1.39 | 0.72 | 0.32 | 0.37 | 0.14 | 1.13 | 1.24 | 2.75 | 2.06 | 3.82 | b | |||||||||||
1950 | 0.96 | 2.54 | 1.61 | 1.32 | a | 0.30 | 0.13 | 0.27 | 0.72 | 0.24 | 1.77 | 1.34 | ----- | z | ----- | z | ||||||||||
1951 | ----- | z | 2.53 | 1.20 | 0.33 | 0.36 | 0.20 | 0.14 | 2.11 | 0.75 | 0.88 | 1.62 | 2.00 | ----- | z | |||||||||||
1952 | 2.00 | 0.92 | 0.56 | 1.93 | 0.42 | 0.35 | 0.51 | 0.62 | 0.32 | 0.50 | 1.35 | 1.64 | 2.00 | |||||||||||||
1953 | 2.54 | 1.63 | 0.70 | 0.29 | 0.58 | 0.48 | 0.32 | 0.36 | 1.62 | 1.93 | 1.15 | d | 2.00 | 2.54 | d | |||||||||||
1954 | 4.03 | 3.70 | 1.63 | 1.60 | 0.16 | 0.30 | 0.70 | 1.24 | 1.18 | 1.09 | 3.58 | 2.31 | 4.03 | |||||||||||||
1955 | 0.73 | 2.02 | 1.17 | 1.28 | 0.30 | 0.55 | 0.52 | 0.10 | a | 0.40 | 1.61 | 4.81 | b | 1.50 | 4.81 | c | ||||||||||
1956 | 3.00 | 0.80 | 2.00 | 0.08 | 0.12 | 0.80 | a | 0.16 | 0.04 | 0.58 | 2.00 | a | 1.20 | 2.50 | a | 3.00 | c | |||||||||
1957 | 0.87 | 2.70 | b | 1.22 | a | 1.61 | 0.57 | 0.80 | 0.42 | 0.41 | 0.33 | 1.50 | 1.34 | 2.00 | a | 2.70 | d | |||||||||
1958 | 3.20 | g | 1.48 | 0.55 | 1.00 | 0.46 | 0.73 | 0.00 | 0.31 | 0.58 | 1.18 | 1.77 | 1.34 | 3.20 | g | |||||||||||
1959 | 1.03 | 0.44 | 1.20 | 1.26 | 0.40 | h | 0.39 | b | 0.09 | 0.25 | 0.83 | 0.97 | 2.50 | 2.46 | 2.50 | j | ||||||||||
1960 | 2.75 | 2.30 | 1.73 | 1.80 | 0.47 | c | 0.26 | 0.00 | 0.54 | 0.62 | 1.33 | 1.48 | 1.97 | 2.75 | c | |||||||||||
1961 | 2.80 | a | 2.52 | 1.28 | 0.38 | 0.64 | 0.29 | 0.71 | 0.90 | 0.71 | 1.68 | 1.99 | 1.08 | 2.80 | a | |||||||||||
1962 | 1.60 | 1.01 | 1.44 | 1.43 | 1.14 | a | 1.09 | 0.23 | 0.54 | 0.81 | a | 2.06 | 2.40 | 2.10 | 2.40 | b | ||||||||||
1963 | 2.24 | 2.32 | 1.30 | 0.55 | 1.04 | 0.20 | 1.04 | 0.34 | 0.64 | 1.96 | 1.23 | 1.03 | a | 2.32 | a | |||||||||||
1964 | 1.68 | 0.98 | 2.67 | 0.58 | 0.42 | 0.81 | 0.38 | 0.58 | 1.52 | 0.48 | 1.16 | a | 3.03 | e | 3.03 | f | ||||||||||
1965 | 2.05 | 2.33 | 0.24 | 1.20 | 1.06 | 0.33 | 0.17 | 0.62 | 0.23 | 1.21 | 1.62 | c | 1.39 | 2.33 | c | |||||||||||
1966 | 2.01 | 1.21 | 1.71 | 0.76 | 0.72 | 0.61 | 0.50 | 0.30 | 0.41 | 2.10 | a | 1.98 | 2.02 | 2.10 | a | |||||||||||
1967 | 3.62 | 2.60 | 1.49 | 0.71 | 0.27 | 0.39 | 0.17 | 0.00 | 0.69 | 2.29 | 1.07 | 3.41 | e | 3.62 | e | |||||||||||
1968 | 2.11 | c | ----- | z | 2.00 | 0.42 | 0.55 | 0.43 | b | 0.12 | 0.62 | 0.73 | 1.50 | 1.26 | 2.26 | ----- | z | |||||||||
1969 | 1.24 | 2.15 | 1.71 | 0.77 | 0.74 | 0.30 | 0.14 | 0.12 | 0.79 | 0.81 | 1.85 | 1.76 | 2.15 | |||||||||||||
1970 | 1.40 | 1.59 | 0.78 | 1.68 | 0.51 | 0.10 | 0.01 | 0.18 | 0.65 | 1.49 | 1.77 | 3.45 | b | 3.45 | b | |||||||||||
1971 | 1.48 | 1.43 | 2.27 | 0.64 | 0.78 | 0.46 | 0.10 | 0.30 | 0.39 | 1.07 | 1.81 | c | ----- | z | ----- | z | ||||||||||
1972 | ----- | z | 2.14 | 1.73 | 1.02 | 0.15 | ----- | z | ----- | z | ----- | z | 1.65 | 0.50 | 1.80 | 2.05 | b | ----- | z | |||||||
1973 | 0.95 | 1.25 | 1.10 | 0.35 | 0.37 | 0.23 | 0.13 | 0.35 | 0.35 | ----- | z | 1.40 | 1.98 | ----- | z | |||||||||||
1974 | 2.53 | 1.58 | 1.30 | 0.81 | 0.45 | 0.50 | 0.40 | 0.04 | 0.08 | 0.31 | 0.93 | 2.12 | 2.53 | |||||||||||||
1975 | 0.86 | 1.33 | 1.25 | 0.42 | 1.18 | 0.17 | 0.12 | 1.40 | 0.02 | 1.30 | 1.74 | 1.97 | 1.97 | |||||||||||||
1976 | 2.05 | 2.17 | 1.10 | 0.48 | 0.68 | 0.17 | 0.20 | 0.40 | 0.17 | 0.80 | 0.20 | 1.60 | 2.17 | |||||||||||||
1977 | 1.51 | b | 2.03 | 2.57 | 0.22 | 0.49 | 0.36 | 0.27 | 1.52 | 0.35 | 1.27 | 1.70 | d | 7.25 | x | ----- | z | |||||||||
1978 | 0.86 | 1.02 | 1.00 | 0.58 | f | 0.72 | 0.39 | 0.57 | 0.50 | 1.14 | 0.46 | 2.48 | 0.82 | 2.48 | f | |||||||||||
1979 | 0.69 | 2.44 | c | 0.86 | 2.07 | 0.31 | 0.49 | 0.31 | 0.30 | 1.08 | 1.34 | 0.76 | 3.22 | 3.22 | c | |||||||||||
1980 | 2.20 | 2.25 | 1.26 | 0.93 | 0.57 | 0.36 | 0.41 | 0.27 | 0.58 | 0.35 | 2.46 | 3.45 | 3.45 | |||||||||||||
1981 | 0.75 | 1.67 | 0.89 | 0.87 | b | 0.80 | 0.67 | 0.32 | 0.04 | 0.97 | 1.10 | 1.36 | 2.54 | 2.54 | b | |||||||||||
1982 | 2.23 | 1.94 | 0.57 | 1.25 | ----- | z | 0.52 | 0.32 | 0.24 | 0.16 | 1.45 | 1.52 | 2.85 | a | ----- | z | ||||||||||
1983 | 2.43 | c | 1.82 | 2.63 | 0.50 | b | 0.81 | 0.52 | 0.70 | 0.13 | a | 0.92 | 0.43 | 2.26 | 1.67 | b | 2.63 | h | ||||||||
1984 | 1.67 | 1.00 | a | 1.26 | 1.41 | 0.62 | a | 0.55 | 0.05 | ----- | z | 0.82 | 1.07 | 2.67 | 2.05 | ----- | z | |||||||||
1985 | 0.57 | a | 0.82 | a | 0.86 | 1.08 | a | 0.09 | a | 0.70 | 0.10 | 0.27 | 0.30 | 2.80 | 0.80 | a | 0.80 | 2.80 | e | |||||||
1986 | 3.03 | e | 1.00 | ----- | z | 0.22 | f | 1.46 | a | ----- | z | 0.35 | 0.00 | 0.40 | a | 1.26 | 2.90 | m | 1.71 | c | ----- | z | ||||
1987 | 2.54 | b | 2.06 | f | 1.11 | d | 1.43 | c | 0.83 | 0.34 | 0.70 | 0.46 | 0.48 | 0.15 | 1.28 | 2.12 | 2.54 | o | ||||||||
1988 | 1.17 | 1.12 | 2.43 | 1.78 | 0.64 | 0.49 | 0.23 | 0.18 | 1.73 | 1.10 | 1.53 | 1.90 | 2.43 | |||||||||||||
1989 | 1.07 | 0.83 | 0.97 | 2.23 | 0.50 | 0.20 | 0.15 | 0.60 | 0.12 | 0.95 | 1.84 | 2.65 | 2.65 | |||||||||||||
1990 | 1.44 | 1.67 | a | 1.01 | 0.30 | 0.50 | 0.65 | 0.58 | 1.00 | 0.32 | 1.98 | 2.38 | 2.43 | c | 2.43 | d | ||||||||||
1991 | 1.80 | 2.35 | 1.97 | 4.10 | 0.34 | 0.24 | 0.37 | 1.86 | 0.03 | 0.58 | 2.72 | a | 1.57 | 4.10 | a | |||||||||||
1992 | 2.22 | 1.31 | 0.52 | 1.01 | 0.39 | 0.49 | 0.28 | 0.25 | 0.85 | 0.75 | 1.56 | 2.10 | 2.22 | |||||||||||||
1993 | 2.28 | 0.19 | 1.47 | 1.56 | 0.66 | 0.24 | a | 0.89 | 0.46 | 0.03 | 1.26 | 0.62 | 2.09 | 2.28 | a | |||||||||||
1994 | 1.45 | 1.82 | 1.90 | 0.45 | 0.72 | 0.99 | 0.07 | 0.36 | 0.48 | 1.43 | 1.30 | 1.94 | 1.94 | |||||||||||||
1995 | 1.65 | 2.75 | 2.34 | 0.82 | 0.17 | 0.32 | 0.53 | 1.18 | 0.44 | 1.85 | 3.75 | 1.75 | 3.75 | |||||||||||||
1996 | 1.85 | 1.32 | 0.38 | 1.30 | 0.70 | 0.47 | 0.35 | 0.10 | 0.43 | 1.60 | 2.00 | 1.93 | d | 2.00 | d | |||||||||||
1997 | 2.20 | 1.53 | 2.87 | 1.23 | 1.07 | 0.82 | 0.61 | 0.77 | 1.12 | 2.04 | 1.18 | 1.86 | 2.87 | |||||||||||||
1998 | 1.55 | 1.44 | 1.13 | 0.24 | 0.29 | 0.49 | 0.60 | 0.11 | 0.16 | 0.99 | 2.62 | 2.20 | a | 2.62 | a | |||||||||||
1999 | 2.65 | 2.14 | a | 1.78 | 0.19 | d | 0.40 | 0.19 | a | 1.45 | 2.00 | 0.10 | 1.40 | 1.82 | 1.20 | 2.65 | f | |||||||||
2000 | 1.40 | b | 0.93 | 0.46 | 0.37 | 0.61 | b | 0.79 | a | 0.17 | 0.29 | 0.45 | 1.94 | a | 1.35 | 1.68 | e | 1.94 | k | |||||||
2001 | 2.14 | a | 0.60 | 1.14 | a | 1.48 | d | 1.10 | a | 0.29 | 0.19 | 0.77 | 0.13 | b | 1.42 | a | 2.19 | a | 1.98 | 2.19 | k | |||||
2002 | 2.89 | c | 2.68 | a | 1.66 | a | 1.50 | a | 0.20 | a | 1.40 | 0.80 | 0.03 | 0.40 | 0.34 | 1.77 | a | 3.02 | b | 3.02 | j | |||||
2003 | 2.43 | b | 0.64 | d | 2.70 | b | 0.48 | 0.48 | 0.05 | 0.23 | 0.07 | 0.20 | 4.48 | 3.05 | 1.61 | 4.48 | h | |||||||||
2004 | 2.11 | 0.72 | b | 0.73 | 0.19 | 0.49 | 0.39 | 0.26 | 0.77 | 0.75 | 0.67 | a | 1.70 | 2.36 | 2.36 | c | ||||||||||
2005 | 1.11 | b | 0.52 | 1.20 | a | 0.98 | a | 1.15 | 0.66 | 0.21 | a | 0.38 | 0.72 | 1.28 | a | 1.22 | 1.33 | a | 1.33 | g | ||||||
2006 | 2.21 | 1.28 | 1.98 | g | 0.45 | 0.31 | 0.73 | a | 0.23 | 0.22 | 0.28 | 0.32 | b | 2.59 | g | 2.40 | n | ----- | z | |||||||
2007 | 2.35 | b | 1.62 | b | 2.10 | d | 0.65 | d | 0.37 | 0.29 | 0.97 | 0.57 | 0.50 | a | 1.64 | e | 1.27 | e | 3.35 | d | ----- | z | ||||
2008 | 2.22 | b | 1.23 | c | 0.63 | c | 0.64 | d | 0.30 | a | 0.70 | 0.10 | 0.68 | 0.35 | 0.66 | g | 2.53 | 1.50 | g | ----- | z | |||||
2009 | 2.12 | e | 0.94 | j | 0.74 | k | 0.98 | k | ----- | z | ----- | z | ----- | z | 0.25 | c | 0.68 | c | 3.46 | j | 4.27 | f | 2.10 | m | ----- | z |
2010 | 2.98 | k | 0.82 | f | 1.95 | f | 2.27 | j | 1.43 | c | 0.25 | a | 0.14 | c | 0.09 | a | 0.95 | b | 2.55 | d | 1.62 | g | 3.36 | d | ----- | z |
2011 | 1.51 | c | 1.53 | h | 2.00 | i | 1.11 | e | 1.29 | g | 0.08 | 0.45 | 0.12 | e | 0.76 | h | 1.28 | g | 4.09 | 1.89 | ----- | z | ||||
2012 | 2.07 | e | 2.04 | b | 2.00 | 0.76 | 0.24 | 0.42 | 0.47 | 0.04 | 0.10 | 1.52 | 2.04 | 1.90 | 2.07 | g | ||||||||||
2013 | 1.99 | 1.00 | 0.95 | d | 0.88 | a | 0.85 | 0.24 | 0.00 | 0.62 | 2.03 | a | 1.62 | a | 1.32 | 0.56 | 2.03 | g | ||||||||
2014 | 2.85 | 2.21 | 2.66 | 0.81 | 0.60 | 0.12 | 0.05 | 0.75 | 0.48 | 1.49 | 1.26 | 2.28 | 2.85 | |||||||||||||
2015 | 2.60 | 2.02 | 1.56 | 1.05 | 0.31 | 0.06 | 0.15 | 0.79 | 0.52 | 1.74 | 3.27 | 2.31 | 3.27 | |||||||||||||
2016 | 2.06 | 1.50 | 2.07 | 0.54 | 0.24 | 0.95 | 0.31 | 0.22 | 0.41 | 1.53 | 1.82 | 0.80 | 2.07 | |||||||||||||
2017 | 2.93 | c | 1.51 | a | 1.56 | 1.09 | d | 0.63 | b | 0.23 | 0.00 | 0.09 | 0.15 | 3.34 | 3.79 | 4.29 | m | 4.29 | w | |||||||
2018 | 5.90 | w | 1.29 | o | 0.63 | t | 2.90 | s | 0.17 | 0.26 | 0.06 | 0.25 | 0.45 | ----- | z | ----- | z | ----- | z | ----- | z | |||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.91 | 1.68 | 1.46 | 0.99 | 0.58 | 0.45 | 0.34 | 0.46 | 0.60 | 1.36 | 1.87 | 2.01 | 2.74 | |||||||||||||
S.D. | 0.74 | 0.76 | 0.67 | 0.63 | 0.32 | 0.28 | 0.28 | 0.46 | 0.42 | 0.73 | 0.88 | 0.67 | 0.68 | |||||||||||||
SKEW | 0.21 | 0.51 | 0.47 | 1.81 | 0.86 | 1.10 | 1.35 | 1.84 | 1.21 | 1.31 | 1.02 | 0.30 | 1.10 | |||||||||||||
MAX | 4.03 | 3.82 | 3.09 | 4.10 | 1.46 | 1.40 | 1.45 | 2.11 | 2.03 | 4.48 | 4.81 | 3.45 | 4.81 | |||||||||||||
MIN | 0.54 | 0.19 | 0.24 | 0.08 | 0.09 | 0.05 | 0.00 | 0.00 | 0.02 | 0.15 | 0.20 | 0.56 | 1.94 | |||||||||||||
YRS | 70 | 70 | 70 | 71 | 72 | 72 | 75 | 75 | 75 | 71 | 72 | 68 | 40 |