| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1978 | ----- | z | ----- | z | ----- | z | 2.93 | 0.06 | 0.00 | 0.00 | 0.60 | 3.00 | 1.10 | 1.36 | 0.35 | 9.40 | c | |||||||||
| 1979 | 1.08 | 0.77 | 1.07 | 0.18 | 0.17 | 0.04 | 0.90 | 1.07 | 0.00 | 0.55 | 0.57 | 0.20 | 6.60 | |||||||||||||
| 1980 | 1.09 | 0.98 | 1.95 | 0.64 | 3.43 | 0.33 | 0.42 | 0.26 | 1.81 | 0.20 | 1.00 | 0.00 | 12.11 | |||||||||||||
| 1981 | 0.86 | 0.66 | 1.43 | 1.90 | 2.07 | 0.03 | 0.08 | 0.08 | 0.20 | 4.23 | 0.28 | 0.00 | 11.82 | |||||||||||||
| 1982 | 0.74 | 0.20 | b | 2.10 | 0.68 | 2.14 | 0.22 | 0.74 | a | 0.90 | 3.95 | 2.09 | 1.23 | 0.12 | 15.11 | |||||||||||
| 1983 | 1.66 | 0.92 | 1.36 | 1.32 | 0.12 | 0.42 | 0.00 | 3.92 | 0.50 | 0.62 | 1.48 | 1.37 | 13.69 | |||||||||||||
| 1984 | 0.35 | b | 0.56 | a | 0.78 | 0.88 | 0.00 | 0.33 | 2.94 | 1.54 | a | 1.66 | 0.85 | 0.44 | 1.54 | d | 11.87 | |||||||||
| 1985 | 0.66 | 0.65 | 0.97 | 0.00 | 0.69 | 0.00 | 1.21 | 0.00 | 0.52 | 2.55 | 1.48 | 0.34 | 9.07 | |||||||||||||
| 1986 | 0.48 | 0.66 | 1.40 | 0.82 | 0.75 | 0.00 | 0.75 | 0.56 | 0.37 | 0.86 | 0.16 | 0.00 | 6.81 | |||||||||||||
| 1987 | 0.83 | 0.43 | 0.81 | b | 0.85 | 1.70 | a | 0.27 | 1.13 | 1.00 | 0.06 | 2.13 | 2.53 | 0.50 | 12.24 | |||||||||||
| 1988 | 1.41 | 0.00 | 0.16 | 1.94 | 1.39 | 0.42 | 0.14 | 0.66 | 0.91 | 0.00 | 0.85 | 0.44 | 8.32 | |||||||||||||
| 1989 | 0.15 | a | 0.51 | 0.06 | 0.00 | 2.04 | 1.08 | 0.56 | 2.24 | 0.22 | 0.51 | 0.00 | 0.00 | 7.37 | ||||||||||||
| 1990 | 0.26 | b | 0.84 | 0.81 | 0.89 | 0.74 | 1.21 | 0.28 | 0.27 | 0.63 | 0.93 | 0.54 | 0.02 | 7.42 | ||||||||||||
| 1991 | 0.24 | 0.19 | 1.65 | 0.26 | 1.98 | 0.28 | 0.06 | 0.11 | 0.44 | 0.86 | 0.03 | 0.41 | 6.51 | |||||||||||||
| 1992 | 0.77 | 0.29 | 2.43 | 0.12 | 0.05 | 0.18 | 0.60 | 0.22 | 0.48 | 0.65 | 0.02 | 0.25 | 6.06 | |||||||||||||
| 1993 | 1.48 | 1.10 | 0.77 | 0.07 | 0.12 | 1.30 | 0.12 | 0.48 | 0.13 | 0.53 | 0.51 | 0.55 | 7.16 | |||||||||||||
| 1994 | 0.63 | 0.51 | 0.59 | 0.92 | 1.33 | 0.03 | 0.00 | 1.00 | 0.52 | 0.37 | 0.61 | 1.50 | 8.01 | |||||||||||||
| 1995 | 0.81 | 0.28 | 0.92 | 1.53 | 3.11 | 1.31 | 0.20 | 0.53 | 0.15 | 0.00 | 0.00 | 0.52 | 9.36 | |||||||||||||
| 1996 | 0.12 | 0.68 | 0.87 | 0.00 | 0.99 | 0.18 | 0.08 | 0.04 | 0.12 | 0.29 | 1.85 | 0.72 | 5.94 | |||||||||||||
| 1997 | 1.21 | b | 0.58 | 0.16 | 0.18 | 0.29 | 1.19 | 0.53 | 0.79 | 1.53 | 0.72 | 0.85 | 0.29 | 8.32 | ||||||||||||
| 1998 | 1.10 | 1.85 | 1.92 | 1.43 | 1.10 | 1.52 | 0.98 | 0.17 | 1.54 | 1.77 | 0.83 | 0.04 | 14.25 | |||||||||||||
| 1999 | 0.72 | 0.69 | 0.15 | 1.05 | 0.86 | 0.78 | 0.04 | 0.16 | 0.29 | 0.00 | ----- | z | 0.00 | 4.74 | a | |||||||||||
| 2000 | 0.57 | e | 1.97 | 0.69 | 1.28 | a | 0.48 | 0.00 | 0.00 | 1.02 | 0.53 | 2.03 | 0.06 | 0.34 | 8.97 | |||||||||||
| 2001 | 0.46 | 0.26 | 0.05 | 1.52 | 0.45 | 0.04 | 0.62 | 0.20 | 0.28 | 0.61 | 0.78 | 1.38 | 6.65 | |||||||||||||
| 2002 | 0.50 | 0.63 | 0.46 | 0.54 | 0.93 | 0.33 | 0.31 | 0.00 | 0.19 | 0.82 | 0.33 | a | 0.10 | a | 5.14 | |||||||||||
| 2003 | 0.23 | 0.81 | 0.46 | 1.45 | 0.91 | 0.02 | a | 0.47 | 2.19 | 0.21 | 0.00 | 0.72 | 0.81 | 8.28 | ||||||||||||
| 2004 | 0.33 | b | 0.76 | a | 0.00 | a | 0.97 | 0.00 | 0.12 | 0.28 | 0.41 | 0.00 | 1.12 | 0.88 | 0.27 | 5.14 | ||||||||||
| 2005 | 1.46 | 1.08 | 1.06 | 2.46 | a | 1.95 | 0.11 | 0.13 | 0.60 | a | 0.07 | j | 0.24 | 0.53 | 0.33 | 9.95 | a | |||||||||
| 2006 | 0.61 | a | 0.21 | 1.20 | 0.90 | 0.12 | 0.08 | c | 1.60 | 0.19 | 0.07 | 0.50 | 0.00 | 0.46 | 5.94 | |||||||||||
| 2007 | 0.35 | 0.75 | g | 0.73 | 0.92 | g | 0.04 | 0.66 | 0.05 | 1.27 | 1.41 | 0.24 | 0.00 | 1.05 | 5.80 | b | ||||||||||
| 2008 | 0.41 | 1.14 | 0.25 | 0.00 | 0.02 | 0.07 | a | 0.42 | 0.18 | 0.16 | 0.27 | 1.21 | 0.28 | a | 4.41 | |||||||||||
| 2009 | 0.40 | 0.99 | 0.30 | 1.05 | a | 0.13 | e | 1.14 | 0.66 | 0.55 | 0.15 | 0.76 | 0.12 | 1.09 | a | 7.34 | ||||||||||
| 2010 | 0.69 | 0.86 | 0.72 | 1.10 | 1.31 | g | 0.12 | c | 0.23 | a | 0.72 | b | 0.00 | 1.73 | 1.00 | 1.25 | b | 8.42 | a | |||||||
| 2011 | 0.10 | 0.25 | a | 0.83 | 0.76 | a | 1.41 | b | 0.16 | 1.00 | a | 0.22 | a | 0.47 | e | 1.34 | 0.38 | b | 0.08 | 7.00 | ||||||
| 2012 | 0.62 | 0.71 | 0.15 | 0.42 | 0.12 | 0.02 | 0.95 | 1.26 | 0.34 | a | 0.03 | 0.19 | 1.10 | 5.91 | ||||||||||||
| 2013 | 0.76 | 0.10 | 0.82 | b | 0.07 | 0.20 | 0.00 | a | 0.30 | 0.23 | 1.53 | 0.28 | 1.38 | 0.80 | 6.47 | |||||||||||
| 2014 | 0.37 | 0.32 | 1.25 | 0.89 | 0.54 | 0.00 | 0.65 | 1.28 | 1.29 | 0.00 | 0.05 | e | 0.76 | 7.40 | ||||||||||||
| 2015 | 0.67 | 0.04 | 0.20 | 0.77 | 0.95 | 0.23 | 0.31 | 0.47 | 0.04 | 1.32 | 1.33 | 0.21 | 6.54 | |||||||||||||
| 2016 | 1.67 | a | 0.63 | l | 0.26 | 1.38 | 1.44 | 0.67 | 0.00 | 0.69 | 0.11 | 0.19 | 0.49 | 0.69 | 7.59 | a | ||||||||||
| 2017 | 1.09 | 0.75 | 2.19 | 0.43 | 0.29 | 0.03 | 0.27 | d | 0.08 | 0.40 | 0.00 | 0.62 | 0.08 | 6.23 | ||||||||||||
| 2018 | 0.64 | 0.12 | e | 0.86 | a | 0.77 | 0.54 | 0.00 | 0.10 | 0.16 | 0.04 | 1.38 | h | 0.17 | 0.10 | a | 3.50 | a | ||||||||
| 2019 | 0.68 | 1.35 | 1.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 3.93 | i | |||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.71 | 0.66 | 0.90 | 0.88 | 0.89 | 0.36 | 0.49 | 0.69 | 0.66 | 0.83 | 0.67 | 0.50 | 8.22 | |||||||||||||
| S.D. | 0.42 | 0.44 | 0.65 | 0.68 | 0.87 | 0.45 | 0.55 | 0.75 | 0.85 | 0.87 | 0.59 | 0.46 | 2.77 | |||||||||||||
| SKEW | 0.71 | 0.97 | 0.63 | 0.86 | 1.12 | 1.26 | 2.35 | 2.33 | 2.17 | 1.83 | 0.97 | 0.87 | 1.06 | |||||||||||||
| MAX | 1.67 | 1.97 | 2.43 | 2.93 | 3.43 | 1.52 | 2.94 | 3.92 | 3.95 | 4.23 | 2.53 | 1.54 | 15.11 | |||||||||||||
| MIN | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 4.41 | |||||||||||||
| YRS | 41 | 39 | 41 | 40 | 40 | 41 | 41 | 41 | 40 | 40 | 40 | 41 | 34 | |||||||||||||