| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.21 | a | 1.03 | 1.97 | 0.05 | 0.14 | 0.08 | 3.48 | f | |||||
| 1964 | 0.00 | 0.16 | ----- | z | 0.31 | 1.25 | 1.46 | 0.13 | 0.11 | 0.00 | 0.14 | 0.30 | 0.75 | 4.61 | a | |||||||||||
| 1965 | 0.00 | 0.33 | 0.11 | 1.22 | 1.26 | 2.66 | 0.76 | 0.79 | 1.32 | 0.27 | 0.81 | 0.53 | 10.06 | |||||||||||||
| 1966 | 0.08 | 0.32 | 0.18 | 0.63 | 0.38 | 0.67 | 0.57 | 0.76 | 0.86 | 0.70 | 0.14 | 0.62 | 5.91 | |||||||||||||
| 1967 | 0.31 | 0.10 | 0.75 | 0.58 | 0.71 | 3.61 | 0.39 | 0.28 | 0.25 | 0.95 | 0.13 | 0.32 | 8.38 | |||||||||||||
| 1968 | 0.00 | 0.17 | 0.19 | 0.72 | 1.24 | 1.39 | 0.03 | 1.30 | 0.46 | 0.49 | 0.00 | 0.48 | 6.47 | |||||||||||||
| 1969 | 0.59 | 0.86 | 0.20 | 0.04 | 0.18 | 2.25 | 0.42 | 0.33 | a | 0.07 | 0.49 | a | 0.00 | 0.19 | 5.62 | |||||||||||
| 1970 | 0.08 | 0.00 | 0.49 | 0.08 | 0.86 | 1.90 | 0.51 | 0.17 | 0.73 | 0.71 | 0.91 | 0.22 | 6.66 | |||||||||||||
| 1971 | 0.45 | 0.07 | 0.18 | 1.84 | 0.93 | 0.26 | 0.96 | 0.22 | 0.49 | 0.95 | 0.23 | 0.56 | 7.14 | |||||||||||||
| 1972 | 0.28 | 0.03 | 0.03 | 0.40 | 0.45 | 1.78 | ----- | z | 0.78 | 0.70 | ----- | z | 0.06 | 0.07 | 4.58 | b | ||||||||||
| 1973 | 0.27 | ----- | z | 0.38 | 0.44 | 0.47 | 0.02 | 2.85 | 0.17 | 1.59 | 0.30 | 0.08 | 0.15 | 6.72 | a | |||||||||||
| 1974 | 0.28 | ----- | z | 0.09 | 0.41 | ----- | z | 0.08 | 0.11 | 0.28 | 0.00 | 0.69 | ----- | z | 0.07 | 2.01 | c | |||||||||
| 1975 | 0.34 | 0.11 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.29 | 0.21 | 0.08 | 2.03 | g | |||||
| 1976 | 0.00 | 0.81 | 0.00 | 0.61 | 1.63 | 0.48 | 0.09 | 0.30 | 0.09 | 0.09 | 0.00 | 0.00 | 4.10 | |||||||||||||
| 1977 | 0.09 | 0.00 | 0.21 | 0.01 | 0.80 | 0.41 | 1.05 | 1.89 | 0.53 | 0.53 | 0.60 | 0.13 | 6.25 | |||||||||||||
| 1978 | 0.22 | 0.29 | 0.15 | 1.74 | 0.80 | 1.70 | 0.47 | 0.55 | 0.78 | 0.03 | 0.15 | 0.51 | 7.39 | |||||||||||||
| 1979 | 0.37 | 0.41 | 0.12 | 0.06 | 0.46 | 0.28 | 0.19 | 1.54 | 0.11 | 0.66 | 0.21 | 0.10 | 4.51 | |||||||||||||
| 1980 | 1.01 | 0.50 | 0.54 | 0.41 | 2.65 | 0.34 | 0.89 | 0.41 | 0.60 | 0.93 | 0.63 | 0.10 | 9.01 | |||||||||||||
| 1981 | 0.15 | 0.02 | 1.00 | 0.78 | 1.83 | 0.06 | 0.65 | 0.07 | 0.52 | 1.23 | 0.15 | 0.42 | 6.88 | |||||||||||||
| 1982 | 0.15 | 0.23 | a | 0.34 | 0.66 | 0.40 | 0.39 | 2.40 | 0.23 | 5.24 | 0.14 | 0.60 | 0.08 | 10.86 | ||||||||||||
| 1983 | 0.07 | 0.18 | 0.77 | 1.74 | 2.74 | 0.54 | 0.50 | 1.95 | 2.17 | 0.51 | 1.24 | a | 0.92 | 13.33 | ||||||||||||
| 1984 | 0.04 | 0.14 | 0.00 | 1.48 | 0.57 | 0.46 | 1.72 | 0.38 | 1.72 | 0.00 | 0.58 | 0.05 | 7.14 | |||||||||||||
| 1985 | 0.52 | 0.17 | 0.18 | 0.00 | 0.84 | 0.51 | 0.84 | 0.01 | 1.33 | 0.03 | 0.70 | 0.79 | 5.92 | |||||||||||||
| 1986 | 0.00 | 1.08 | 0.56 | 0.74 | 1.42 | 0.84 | 1.21 | 1.33 | 0.63 | 2.33 | 0.05 | 0.21 | 10.40 | |||||||||||||
| 1987 | 0.46 | 0.17 | 0.76 | 0.17 | 3.06 | 0.35 | 1.59 | 1.38 | 0.16 | 1.11 | 0.50 | 0.25 | 9.96 | |||||||||||||
| 1988 | 0.17 | 0.02 | 0.34 | 0.66 | 0.47 | 0.95 | 0.00 | 0.12 | 1.04 | 0.09 | 0.31 | 0.06 | 4.23 | |||||||||||||
| 1989 | 0.00 | 0.31 | 0.29 | 0.19 | 0.60 | 0.59 | 0.75 | 0.31 | 1.47 | 0.30 | 0.15 | c | 0.03 | c | 4.99 | |||||||||||
| 1990 | 0.11 | b | 0.03 | 0.11 | 0.75 | 1.42 | 0.65 | 0.70 | 0.47 | 0.48 | 0.05 | 0.55 | 0.08 | 5.40 | ||||||||||||
| 1991 | 0.05 | 0.00 | 0.39 | 1.19 | 1.42 | 2.33 | 0.38 | 0.64 | 0.75 | 1.10 | 0.71 | a | 0.00 | 8.96 | ||||||||||||
| 1992 | 0.39 | 0.03 | 0.29 | 0.25 | 1.11 | 0.59 | 0.63 | 1.11 | 0.42 | 0.76 | 0.39 | 0.48 | 6.45 | |||||||||||||
| 1993 | 0.48 | 0.34 | 0.40 | 0.51 | 2.01 | 0.92 | 0.94 | 1.12 | 0.50 | 1.07 | 0.46 | 0.19 | 8.94 | |||||||||||||
| 1994 | 0.26 | 0.20 | 0.46 | 0.11 | 0.50 | 0.27 | 0.43 | 0.41 | 0.14 | 1.10 | 0.43 | 0.07 | 4.38 | |||||||||||||
| 1995 | 0.18 | 0.75 | 0.36 | 1.59 | 2.58 | 1.78 | 1.03 | 0.88 | 0.82 | 0.14 | 0.28 | 0.17 | 10.56 | |||||||||||||
| 1996 | 0.56 | 0.44 | 0.68 | ----- | z | 1.62 | 0.16 | 0.38 | ----- | z | 0.65 | 0.77 | 0.83 | r | 0.25 | r | 5.26 | d | ||||||||
| 1997 | 0.65 | s | 0.21 | u | ----- | z | 1.65 | u | 0.54 | u | 0.25 | o | ----- | z | 2.05 | o | 1.53 | 1.26 | 0.20 | a | 0.45 | 3.44 | h | |||
| 1998 | 0.17 | 0.60 | 1.23 | 0.60 | 1.82 | 3.44 | 1.21 | 1.23 | 0.65 | 1.17 | 0.25 | 0.00 | 12.37 | |||||||||||||
| 1999 | 0.34 | 0.54 | 0.27 | 2.23 | 1.27 | 1.50 | 0.56 | 0.65 | 1.40 | 0.00 | 0.07 | 0.10 | 8.93 | |||||||||||||
| 2000 | 0.49 | 0.21 | 0.24 | 0.21 | 1.34 | 0.13 | 0.15 | 0.81 | 1.34 | 0.88 | 0.61 | 0.04 | 6.45 | |||||||||||||
| 2001 | 0.09 | 0.39 | a | 0.13 | 1.31 | 0.45 | 0.32 | 0.42 | 0.77 | 0.48 | 0.25 | 0.39 | 0.26 | 5.26 | ||||||||||||
| 2002 | 0.00 | 0.00 | a | 0.81 | 1.45 | w | ----- | z | 0.12 | 0.41 | 0.25 | 0.29 | 1.14 | 0.27 | 0.30 | 3.59 | b | |||||||||
| 2003 | 0.04 | 0.64 | 0.68 | 0.17 | 0.91 | 1.62 | 0.13 | 0.18 | b | 0.05 | 0.00 | d | 0.16 | 0.48 | 5.06 | |||||||||||
| 2004 | 0.12 | 0.85 | 0.04 | 1.91 | 0.94 | a | 1.03 | 0.09 | 0.50 | 0.07 | 1.22 | a | 1.11 | 0.20 | 8.08 | |||||||||||
| 2005 | 1.33 | 0.08 | 0.90 | 1.62 | a | 1.26 | a | 0.32 | 0.26 | 0.84 | 0.29 | 0.13 | b | 0.22 | 0.46 | a | 7.71 | |||||||||
| 2006 | 0.44 | 0.40 | 0.37 | 0.13 | 0.16 | 0.42 | 0.16 | 0.59 | 1.24 | 0.79 | ----- | z | 0.23 | 4.93 | a | |||||||||||
| 2007 | 0.09 | a | 0.12 | a | 0.68 | 0.13 | 1.34 | 0.01 | 0.50 | 1.24 | 1.43 | 0.05 | 0.00 | 0.46 | 6.05 | |||||||||||
| 2008 | 0.31 | 0.58 | 0.12 | 0.15 | 0.69 | 0.09 | 0.09 | 0.50 | 0.72 | 0.65 | 0.33 | 0.09 | 4.32 | |||||||||||||
| 2009 | 0.31 | 0.02 | 0.26 | 0.99 | 0.87 | 1.58 | 0.22 | 0.79 | 0.40 | 0.64 | 0.00 | ----- | z | 6.08 | a | |||||||||||
| 2010 | 0.03 | 0.26 | 0.52 | 1.24 | 0.60 | 1.59 | 0.39 | 1.13 | 0.05 | 0.06 | 0.25 | 0.33 | 6.45 | |||||||||||||
| 2011 | 0.02 | 0.41 | 0.30 | 0.79 | 4.01 | 0.44 | 0.18 | 0.19 | 0.21 | 0.31 | 0.32 | 0.08 | 7.26 | |||||||||||||
| 2012 | 0.11 | 0.10 | 0.03 | 0.13 | 0.07 | 0.01 | 0.62 | 0.43 | 0.14 | 0.68 | 0.09 | 0.21 | 2.62 | |||||||||||||
| 2013 | 0.05 | 0.33 | 0.16 | 0.36 | 1.26 | 0.01 | 1.21 | 0.40 | 4.23 | 1.39 | 0.17 | 0.63 | 10.20 | |||||||||||||
| 2014 | 0.30 | 0.31 | 0.45 | 0.15 | 1.32 | 1.00 | 0.79 | 1.86 | 2.71 | 0.10 | 0.26 | 0.13 | 9.38 | |||||||||||||
| 2015 | 0.00 | 0.08 | 0.04 | 1.00 | 4.72 | 0.42 | 0.29 | 0.81 | 0.36 | 0.27 | 0.23 | 0.36 | 8.58 | |||||||||||||
| 2016 | 0.19 | 0.11 | 0.75 | 1.58 | 4.04 | 0.24 | 0.41 | 0.63 | 1.41 | 1.09 | 0.17 | 0.50 | 11.12 | |||||||||||||
| 2017 | 2.05 | 0.65 | 2.42 | 1.19 | 0.62 | 0.00 | 0.34 | 0.73 | 1.74 | 0.05 | 0.24 | 0.12 | 10.15 | |||||||||||||
| 2018 | 0.31 | 0.53 | 0.02 | 0.01 | 2.10 | 1.60 | 0.80 | 0.59 | 0.00 | 1.34 | 0.23 | 0.19 | 7.72 | |||||||||||||
| 2019 | 0.43 | 0.44 | 1.04 | 1.54 | 1.47 | 0.10 | 0.14 | 0.02 | 1.41 | 0.11 | 0.74 | 1.03 | 8.47 | |||||||||||||
| 2020 | 0.30 | 0.18 | 0.73 | 0.51 | 0.23 | 1.23 | 0.12 | 0.10 | 0.10 | 0.02 | 0.23 | 0.19 | 3.94 | |||||||||||||
| 2021 | 0.30 | 0.34 | 0.17 | 0.25 | 0.84 | 0.06 | 0.08 | 1.04 | 0.77 | 2.73 | 0.23 | 0.40 | 7.21 | |||||||||||||
| 2022 | 0.12 | 0.02 | 0.27 | 0.47 | 0.79 | 0.33 | 0.02 | 0.91 | 0.53 | 0.19 | 0.47 | 0.79 | 4.91 | |||||||||||||
| 2023 | 2.09 | 0.35 | 0.25 | 1.10 | 0.34 | 2.46 | 0.55 | 0.76 | 1.20 | 0.38 | 0.34 | 0.03 | 9.85 | |||||||||||||
| 2024 | 0.42 | 0.55 | 0.91 | 0.15 | 0.14 | 0.09 | 0.37 | 1.42 | 0.06 | 0.98 | 0.19 | 0.21 | 5.49 | |||||||||||||
| 2025 | 0.06 | 0.55 | 0.71 | 0.24 | 0.41 | 0.19 | 0.22 | 0.71 | 0.41 | 0.71 | 0.00 | u | ----- | z | 4.21 | b | ||||||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.30 | 0.30 | 0.42 | 0.70 | 1.22 | 0.85 | 0.58 | 0.69 | 0.87 | 0.62 | 0.33 | 0.28 | 7.40 | |||||||||||||
| S.D. | 0.41 | 0.26 | 0.40 | 0.59 | 0.99 | 0.87 | 0.55 | 0.48 | 0.94 | 0.56 | 0.27 | 0.25 | 2.39 | |||||||||||||
| SKEW | 3.02 | 0.88 | 2.34 | 0.78 | 1.68 | 1.31 | 2.05 | 0.77 | 2.47 | 1.26 | 1.29 | 1.08 | 0.32 | |||||||||||||
| MAX | 2.09 | 1.08 | 2.42 | 2.23 | 4.72 | 3.61 | 2.85 | 1.95 | 5.24 | 2.73 | 1.24 | 1.03 | 13.33 | |||||||||||||
| MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.07 | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 2.62 | |||||||||||||
| YRS | 61 | 59 | 59 | 58 | 58 | 60 | 60 | 60 | 62 | 62 | 59 | 60 | 51 | |||||||||||||