YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.37 | 1.33 | 0.54 | 2.24 | i | |||
1950 | 1.77 | 1.17 | 1.45 | 0.83 | 0.81 | 0.77 | d | 0.01 | a | 0.00 | 0.08 | 1.97 | b | 1.02 | 1.82 | c | 11.70 | |||||||||
1951 | 1.39 | 0.69 | 0.77 | 0.25 | 0.33 | 1.69 | 0.44 | 1.52 | 0.21 | 1.58 | 2.34 | 1.61 | 12.82 | |||||||||||||
1952 | 1.90 | a | 0.64 | 0.23 | 0.16 | 0.40 | 1.63 | 0.05 | 0.00 | 0.42 | 0.00 | 0.49 | 1.68 | 7.60 | ||||||||||||
1953 | 1.91 | c | 0.38 | 0.44 | 0.82 | 1.45 | a | 1.61 | a | 0.00 | 0.44 | 0.00 | 0.16 | 1.36 | 0.72 | a | 9.29 | |||||||||
1954 | 1.16 | 0.29 | 0.90 | 0.00 | 1.28 | a | 2.29 | 0.00 | ----- | z | 0.68 | 0.00 | 1.38 | 0.59 | 8.57 | a | ||||||||||
1955 | 0.63 | 0.14 | 0.35 | 1.01 | 0.26 | 1.09 | 1.07 | 0.00 | 0.45 | 0.65 | 1.84 | 3.26 | 10.75 | |||||||||||||
1956 | 2.39 | 0.95 | b | 0.30 | 0.10 | 0.18 | ----- | z | 0.05 | 1.31 | 0.03 | 2.04 | 0.45 | d | 0.25 | c | 8.05 | a | ||||||||
1957 | 0.97 | 0.49 | 1.83 | 1.28 | 1.62 | 0.12 | 0.08 | 0.38 | 0.22 | 1.11 | 0.27 | 0.67 | b | 9.04 | ||||||||||||
1958 | 1.90 | 1.85 | 0.74 | 0.75 | 0.18 | 0.63 | 0.10 | 0.14 | 0.16 | 0.62 | 1.97 | 0.62 | 9.66 | |||||||||||||
1959 | 1.99 | 1.21 | 0.53 | 0.15 | 0.87 | 0.30 | 0.00 | 0.02 | 1.07 | 0.56 | 0.68 | 0.64 | 8.02 | |||||||||||||
1960 | 0.75 | 1.71 | 0.30 | 0.72 | 1.00 | 0.00 | 0.02 | 0.18 | 0.34 | 0.11 | 1.71 | 1.47 | 8.31 | |||||||||||||
1961 | 0.43 | 4.23 | 1.35 | 0.47 | 0.27 | 0.68 | 0.02 | 0.02 | 0.00 | 0.15 | 0.89 | ----- | z | 8.51 | a | |||||||||||
1962 | 0.28 | 1.74 | 1.56 | 1.04 | 1.46 | 0.77 | 0.02 | 0.60 | 0.31 | 1.53 | 0.62 | 1.09 | 11.02 | |||||||||||||
1963 | 0.11 | 1.45 | 1.01 | 1.62 | 0.17 | 0.26 | 0.28 | 0.00 | 0.09 | 0.01 | 2.15 | 1.20 | 8.35 | |||||||||||||
1964 | 1.35 | 0.20 | ----- | z | 0.83 | 0.15 | 1.48 | 0.10 | 0.07 | 0.35 | 0.12 | 1.56 | 1.72 | 7.93 | a | |||||||||||
1965 | 0.69 | 0.17 | 0.05 | 0.71 | 0.21 | 0.60 | 0.44 | 1.87 | 0.00 | 0.03 | 1.64 | 1.65 | 8.06 | |||||||||||||
1966 | 0.96 | 0.12 | 1.31 | 0.05 | 0.22 | 0.91 | 0.46 | 0.05 | 0.59 | 0.29 | 1.78 | 2.01 | 8.75 | |||||||||||||
1967 | 1.13 | 0.02 | 0.76 | 1.03 | 1.50 | 1.59 | 0.12 | 0.00 | 0.06 | 1.04 | 0.43 | 1.46 | 9.14 | |||||||||||||
1968 | 2.68 | 0.86 | 0.30 | 0.55 | 0.56 | 0.14 | a | 0.00 | 1.58 | 0.06 | 1.00 | 1.44 | 2.38 | 11.55 | ||||||||||||
1969 | 1.07 | 2.33 | 0.15 | 0.93 | 0.31 | 0.55 | 0.00 | 0.00 | 0.66 | 0.29 | 0.08 | 3.15 | 9.52 | |||||||||||||
1970 | 2.55 | 0.47 | 0.74 | 0.35 | 0.27 | 0.11 | 0.04 | 0.09 | 0.13 | 0.45 | 1.58 | 2.99 | 9.77 | |||||||||||||
1971 | 1.31 | 0.21 | 1.78 | 0.69 | 0.25 | 1.34 | 0.11 | 0.02 | 0.36 | 0.54 | 1.11 | 2.21 | 9.93 | |||||||||||||
1972 | 0.40 | 0.54 | 1.19 | 0.38 | 1.94 | 1.54 | ----- | z | 0.86 | 0.36 | 0.42 | 1.59 | 0.94 | 10.16 | a | |||||||||||
1973 | 0.80 | 0.24 | 0.18 | 0.00 | 0.34 | ----- | z | 0.05 | 0.15 | 1.91 | 0.90 | 3.65 | ----- | z | 8.22 | b | ||||||||||
1974 | 1.11 | 1.42 | 0.95 | 0.78 | 0.39 | 0.16 | 0.99 | 0.00 | 0.08 | 0.08 | 1.31 | 2.15 | 9.42 | |||||||||||||
1975 | 0.94 | 1.50 | 1.27 | 1.45 | 0.29 | 0.44 | 0.34 | 1.71 | 0.08 | 1.85 | 0.35 | 1.00 | 11.22 | |||||||||||||
1976 | 0.67 | 0.99 | 0.11 | 0.70 | 0.42 | 0.55 | 0.18 | 2.24 | 0.06 | 0.20 | 0.05 | 0.36 | 6.53 | |||||||||||||
1977 | 0.02 | ----- | z | 0.94 | 0.04 | 1.00 | 0.72 | 0.06 | 0.36 | 0.85 | 0.32 | 1.08 | 2.71 | 8.10 | a | |||||||||||
1978 | 2.06 | 1.42 | 1.18 | 1.53 | 0.34 | 0.14 | 1.15 | 1.33 | 0.99 | 0.00 | 0.17 | c | 0.27 | a | 10.58 | |||||||||||
1979 | 0.56 | 1.13 | 0.06 | 0.44 | 0.25 | 0.55 | 0.06 | 0.59 | 0.24 | 1.41 | 1.64 | 1.93 | 8.86 | |||||||||||||
1980 | 1.46 | 3.00 | 0.55 | a | 0.90 | 2.38 | 1.57 | 0.02 | 0.09 | 1.30 | 0.38 | 1.07 | 1.74 | 14.46 | ||||||||||||
1981 | 1.61 | 1.81 | 0.33 | 0.01 | 1.71 | 0.66 | 0.67 | 0.10 | 0.42 | 1.77 | 1.75 | 1.45 | 12.29 | |||||||||||||
1982 | 0.65 | 0.94 | 1.54 | 0.60 | 0.75 | 0.35 | a | 0.93 | 0.42 | a | 0.55 | 0.82 | 1.82 | a | 2.77 | 12.14 | ||||||||||
1983 | 3.15 | 2.52 | 2.53 | 1.37 | 0.83 | a | 0.56 | 0.78 | 1.33 | 1.24 | 0.18 | 5.57 | 1.51 | a | 21.57 | |||||||||||
1984 | 0.32 | 1.31 | 1.36 | 0.97 | 0.99 | a | 2.45 | 0.07 | 0.09 | 0.36 | 0.33 | 3.38 | 0.52 | 12.15 | ||||||||||||
1985 | 0.53 | 0.81 | 0.83 | 0.01 | 0.36 | 0.20 | 0.00 | 0.05 | 0.82 | 0.50 | 0.61 | 0.89 | 5.61 | |||||||||||||
1986 | 2.86 | 0.89 | 0.64 | ----- | z | 0.10 | 0.10 | 0.13 | 0.00 | 2.65 | 0.36 | 0.56 | 0.58 | 8.87 | a | |||||||||||
1987 | 1.62 | 0.80 | 1.58 | a | 0.12 | 0.34 | 1.35 | 1.78 | 0.46 | 0.00 | 0.05 | 0.69 | 3.51 | 12.30 | ||||||||||||
1988 | 0.54 | 0.03 | t | 0.24 | 0.70 | 0.72 | 1.45 | 0.10 | 0.01 | 0.08 | 0.03 | 1.78 | 0.83 | 6.48 | a | |||||||||||
1989 | 0.05 | 1.34 | 1.42 | 0.56 | 2.12 | 0.07 | 0.14 | 0.30 | 0.00 | 0.75 | 0.78 | 0.21 | a | 7.74 | ||||||||||||
1990 | 1.35 | 0.42 | 0.43 | 0.52 | 2.60 | 1.13 | 0.96 | 0.89 | 0.00 | 0.61 | 0.24 | 0.44 | i | 9.15 | a | |||||||||||
1991 | 0.44 | a | 0.47 | ----- | z | 0.33 | 2.05 | 1.42 | 0.46 | 0.10 | 0.00 | 0.50 | 2.19 | 0.34 | 8.30 | a | ||||||||||
1992 | 0.80 | 0.40 | 0.16 | 0.84 | 0.01 | 1.62 | 2.28 | 0.08 | 0.14 | 0.49 | 1.13 | 2.19 | 10.14 | |||||||||||||
1993 | 0.96 | a | 0.59 | 0.35 | 1.67 | 0.37 | 1.67 | 3.08 | 0.34 | 0.16 | 0.02 | 0.25 | a | 2.91 | 12.37 | |||||||||||
1994 | 0.48 | 0.85 | 0.22 | 1.39 | 0.69 | 0.80 | 0.01 | 0.53 | 0.00 | 0.35 | 2.17 | 1.59 | a | 9.08 | ||||||||||||
1995 | 4.26 | 0.28 | 2.77 | 0.56 | 0.49 | 1.15 | 0.21 | 0.18 | 0.32 | 0.36 | 1.98 | 2.76 | 15.32 | |||||||||||||
1996 | 1.29 | 1.54 | 0.46 | 0.46 | 1.26 | 0.23 | 0.23 | 0.00 | 0.50 | 0.38 | 1.03 | 5.18 | 12.56 | |||||||||||||
1997 | 0.88 | 0.70 | 1.02 | 0.81 | 1.21 | 1.23 | 0.88 | 0.19 | 0.62 | 1.55 | 1.14 | 0.39 | 10.62 | |||||||||||||
1998 | 2.81 | 2.25 | 1.66 | 0.67 | 2.08 | 0.41 | 1.36 | 0.04 | 0.26 | 0.72 | 1.72 | 2.06 | 16.04 | |||||||||||||
1999 | 1.93 | 1.94 | 0.82 | 0.06 | 0.82 | 0.86 | 0.13 | 0.67 | 0.00 | 0.51 | 1.11 | 0.95 | 9.80 | |||||||||||||
2000 | 1.61 | 1.53 | 1.34 | 0.16 | 0.41 | 0.22 | 0.69 | 0.00 | 0.04 | 0.41 | 1.16 | 1.06 | 8.63 | |||||||||||||
2001 | 0.30 | 0.68 | 0.85 | 0.08 | 0.14 | 0.94 | 0.17 | 0.07 | 0.12 | 0.52 | 2.40 | 1.67 | 7.94 | |||||||||||||
2002 | 0.87 | 0.79 | 0.44 | 0.21 | 0.37 | 0.45 | 0.20 | 0.07 | 0.21 | 0.06 | 0.85 | 3.24 | 7.76 | |||||||||||||
2003 | 2.99 | 0.42 | 0.35 | 1.19 | 1.03 | 0.56 | 0.00 | 0.00 | 0.18 | 0.54 | 0.22 | 1.60 | 9.08 | |||||||||||||
2004 | 0.94 | 1.49 | 0.36 | 0.13 | a | 1.28 | 0.70 | 0.40 | 0.58 | 0.10 | 1.01 | 0.12 | 2.72 | 9.83 | ||||||||||||
2005 | 2.72 | c | 0.00 | a | 0.05 | b | 0.44 | 2.34 | 0.59 | 0.20 | 0.05 | 0.03 | 1.44 | 2.46 | 2.96 | 13.28 | ||||||||||
2006 | 2.77 | 1.06 | 0.70 | 0.60 | 1.14 | 0.50 | 0.03 | b | 0.00 | 0.00 | 0.58 | 1.29 | a | 2.84 | a | 11.51 | ||||||||||
2007 | 0.35 | 2.16 | 0.02 | 0.00 | 0.50 | 0.65 | 0.38 | 0.00 | 0.65 | 0.25 | 0.39 | 2.49 | 7.84 | |||||||||||||
2008 | 0.91 | f | 0.41 | 2.29 | 0.06 | 0.20 | 1.40 | 0.11 | 0.83 | 0.04 | 0.54 | 1.42 | 1.40 | 8.70 | a | |||||||||||
2009 | 0.76 | 1.52 | a | 0.80 | 0.25 | 0.74 | 0.38 | 0.18 | 0.07 | 0.43 | 1.38 | 0.51 | 1.33 | 8.35 | ||||||||||||
2010 | 2.13 | 1.81 | 0.22 | 0.97 | 1.21 | 1.70 | 0.24 | 0.61 | 1.60 | 0.82 | 1.40 | 1.90 | 14.61 | |||||||||||||
2011 | 0.74 | 0.55 | 2.71 | 0.11 | 2.65 | 0.92 | 0.59 | 0.00 | 0.07 | a | 0.92 | 0.30 | 0.92 | 10.48 | ||||||||||||
2012 | 1.28 | 1.20 | 1.91 | 0.69 | 0.39 | 1.79 | 0.75 | 0.00 | a | 0.00 | 1.45 | a | 1.13 | b | 2.61 | a | 13.20 | |||||||||
2013 | 0.38 | 0.05 | 0.96 | 0.71 | c | 0.69 | c | 0.67 | 0.43 | 0.81 | 0.92 | d | 0.10 | 0.86 | a | 0.02 | 6.60 | |||||||||
2014 | 0.33 | a | 1.32 | 0.95 | 0.69 | 0.17 | c | 0.40 | 0.00 | 1.10 | 0.34 | 1.10 | 1.67 | 1.96 | 10.03 | |||||||||||
2015 | 0.94 | 0.84 | c | 1.01 | 0.30 | b | 1.00 | a | 0.37 | a | 0.07 | 0.00 | 0.00 | a | 0.70 | 0.70 | 0.96 | t | 5.93 | a | ||||||
2016 | 3.22 | 0.55 | i | 3.00 | 0.60 | 0.71 | 1.46 | 0.65 | 0.00 | j | 0.00 | d | 3.80 | b | 1.11 | 2.37 | 16.92 | b | ||||||||
2017 | 1.81 | a | 2.34 | 1.74 | a | 2.31 | 0.66 | 0.58 | a | 0.00 | k | 0.00 | l | 0.00 | h | 1.01 | c | 1.68 | e | 0.82 | g | 12.13 | d | |||
2018 | 2.46 | b | 0.03 | b | 1.74 | 1.31 | 0.52 | 0.25 | 0.00 | 0.01 | 0.20 | 1.17 | 0.82 | 1.50 | 10.01 | |||||||||||
2019 | 1.15 | 0.55 | 0.90 | 0.59 | 1.24 | 0.15 | 0.09 | 0.09 | 2.34 | 0.26 | 0.32 | 1.18 | 8.86 | |||||||||||||
2020 | 2.01 | 0.07 | 0.25 | 0.11 | 0.72 | 0.58 | 0.01 | 0.00 | 0.50 | 1.21 | ----- | z | ----- | z | 5.46 | b | ||||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 1.34 | 1.03 | 0.93 | 0.62 | 0.83 | 0.83 | 0.37 | 0.38 | 0.40 | 0.69 | 1.26 | 1.66 | 10.40 | |||||||||||||
S.D. | 0.91 | 0.80 | 0.71 | 0.49 | 0.67 | 0.58 | 0.56 | 0.54 | 0.54 | 0.65 | 0.91 | 1.00 | 2.71 | |||||||||||||
SKEW | 0.85 | 1.25 | 0.96 | 0.87 | 1.10 | 0.67 | 2.67 | 1.67 | 2.28 | 1.90 | 1.80 | 0.71 | 1.44 | |||||||||||||
MAX | 4.26 | 4.23 | 3.00 | 2.31 | 2.65 | 2.45 | 3.08 | 2.24 | 2.65 | 3.80 | 5.57 | 5.18 | 21.57 | |||||||||||||
MIN | 0.02 | 0.00 | 0.02 | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.05 | 0.02 | 5.61 | |||||||||||||
YRS | 70 | 68 | 69 | 70 | 71 | 69 | 69 | 68 | 70 | 72 | 71 | 66 | 55 |