YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1949 | 0.16 | a | 0.63 | 0.77 | 0.03 | 0.10 | 0.00 | 0.00 | 0.13 | 0.18 | 1.02 | 1.37 | 0.12 | 4.51 | ||||||||||||
1950 | 0.72 | 0.75 | 1.31 | 0.51 | 0.39 | 1.63 | 0.04 | 0.01 | 0.04 | 1.92 | 1.44 | 1.69 | 10.45 | |||||||||||||
1951 | 1.08 | 0.47 | 0.97 | 1.20 | 1.14 | 1.60 | 0.82 | 0.83 | 0.31 | 1.22 | 1.63 | 1.17 | 12.44 | |||||||||||||
1952 | 1.14 | 0.68 | 0.18 | 0.47 | 0.45 | 0.87 | 0.11 | 0.00 | 0.00 | 0.03 | 0.47 | 1.45 | 5.85 | |||||||||||||
1953 | 2.29 | 0.44 | 0.49 | 1.06 | 1.14 | 0.86 | 0.00 | 0.41 | 0.07 | 0.25 | 0.75 | 0.55 | 8.31 | |||||||||||||
1954 | 1.17 | 0.47 | 0.67 | 0.18 | 0.47 | 0.90 | 0.25 | 0.77 | 0.60 | 0.07 | 0.65 | 0.12 | 6.32 | |||||||||||||
1955 | 0.81 | 0.10 | 0.18 | 1.04 | 0.51 | 0.13 | 0.53 | 0.00 | 0.81 | 0.49 | 1.85 | 1.63 | 8.08 | |||||||||||||
1956 | 1.17 | 0.48 | 0.18 | 0.17 | 0.15 | 1.35 | 0.04 | 0.07 | 0.00 | 1.51 | 0.13 | 0.57 | 5.82 | |||||||||||||
1957 | 0.94 | 0.88 | 2.05 | 0.34 | 0.57 | 0.81 | 0.10 | 0.11 | 0.22 | 1.87 | 0.40 | 0.68 | 8.97 | |||||||||||||
1958 | 1.72 | 1.96 | 0.84 | 0.74 | 0.12 | 0.98 | 0.17 | 0.02 | 0.21 | 0.33 | 1.46 | 0.86 | 9.41 | |||||||||||||
1959 | 2.31 | 1.25 | 0.62 | 0.15 | 0.40 | 0.13 | 0.01 | 0.02 | 1.43 | 0.53 | 0.38 | 0.43 | 7.66 | |||||||||||||
1960 | 0.74 | 1.04 | 0.79 | 1.04 | 1.48 | 0.06 | 0.00 | 0.19 | 0.67 | 0.13 | 1.33 | 0.70 | 8.17 | |||||||||||||
1961 | 0.40 | 1.55 | 1.80 | 0.88 | 0.72 | 0.26 | 0.17 | 0.16 | 0.00 | 0.14 | 0.39 | 1.41 | 7.88 | |||||||||||||
1962 | 0.16 | 1.28 | 0.69 | 0.75 | 0.56 | 0.12 | 0.08 | 0.54 | 0.43 | 1.05 | 1.18 | 0.97 | 7.81 | |||||||||||||
1963 | 0.49 | 0.53 | 0.56 | 1.39 | 0.36 | 0.04 | 0.33 | 0.06 | 0.26 | 0.09 | 1.34 | 1.58 | 7.03 | |||||||||||||
1964 | 0.49 | 0.04 | 0.17 | 0.16 | 0.23 | 0.98 | 0.04 | 0.21 | 0.07 | 0.23 | 1.36 | 2.20 | 6.18 | |||||||||||||
1965 | 0.95 | 0.29 | 0.03 | 0.47 | 0.14 | 0.77 | 0.80 | 0.19 | 0.06 | 0.05 | 1.20 | 1.34 | 6.29 | |||||||||||||
1966 | 0.53 | 0.15 | 1.14 | 0.01 | 0.06 | 0.55 | 1.28 | 0.00 | 0.30 | 0.57 | 2.04 | 0.99 | 7.62 | |||||||||||||
1967 | 0.68 | 0.04 | 0.29 | 1.43 | 1.18 | 0.85 | 0.00 | 0.00 | 0.11 | 0.47 | 0.31 | 0.60 | 5.96 | |||||||||||||
1968 | 1.62 | 0.98 | 0.11 | 0.31 | 0.14 | 0.26 | 0.11 | 1.14 | 0.30 | 0.81 | 1.44 | 2.13 | 9.35 | |||||||||||||
1969 | 1.28 | 0.74 | 0.01 | 0.64 | 0.53 | 0.86 | 0.02 | 0.00 | 0.37 | 0.30 | 0.19 | 1.90 | 6.84 | |||||||||||||
1970 | 2.44 | 0.70 | 0.36 | 0.25 | 0.03 | 0.04 | 0.12 | 0.00 | 0.10 | 0.36 | 1.31 | 1.96 | 7.67 | |||||||||||||
1971 | 0.99 | 0.16 | 1.21 | 0.13 | 0.56 | 1.20 | 0.00 | 0.00 | 1.00 | 0.20 | 0.64 | 1.69 | 7.78 | |||||||||||||
1972 | 0.33 | 0.14 | 0.82 | 0.33 | 1.83 | 0.49 | 0.45 | 0.81 | 0.07 | 0.01 | 0.70 | 1.26 | 7.24 | |||||||||||||
1973 | 0.96 | 0.06 | 0.00 | 0.05 | 0.10 | 0.00 | 0.00 | 0.00 | 0.35 | 1.60 | 2.60 | 1.93 | 7.65 | |||||||||||||
1974 | 1.06 | 0.51 | 1.16 | 0.28 | 0.05 | 0.03 | 0.70 | 0.00 | 0.02 | 0.04 | 1.13 | 1.31 | 6.29 | |||||||||||||
1975 | 0.94 | 1.21 | 1.05 | 0.29 | 0.36 | 0.15 | 0.00 | 0.78 | 0.00 | 0.99 | 0.35 | 0.58 | 6.70 | |||||||||||||
1976 | 0.48 | 0.38 | 0.63 | 0.29 | 0.20 | 0.26 | 0.25 | 0.30 | 0.02 | 0.12 | 0.00 | 0.07 | 3.00 | |||||||||||||
1977 | 0.00 | 0.46 | 0.30 | 0.00 | 0.37 | 0.44 | 0.02 | 0.63 | 0.71 | 0.33 | 0.71 | 1.65 | 5.62 | |||||||||||||
1978 | 1.34 | 0.99 | 0.85 | 0.68 | 0.66 | 0.10 | 0.88 | 0.61 | 0.28 | 0.00 | 0.29 | 0.14 | 6.82 | |||||||||||||
1979 | 0.26 | 0.35 | 0.28 | 0.35 | 0.04 | 0.01 | 0.25 | 0.34 | 0.28 | 0.64 | 0.69 | 1.12 | 4.61 | |||||||||||||
1980 | 0.92 | 1.62 | 0.22 | 0.91 | 1.53 | 0.75 | 0.00 | 0.07 | 0.46 | 0.35 | 0.68 | 1.35 | 8.86 | |||||||||||||
1981 | 0.53 | 1.33 | 0.39 | 0.00 | 0.78 | 0.77 | 0.32 | 0.00 | 0.49 | 1.14 | 0.92 | 1.55 | 8.22 | |||||||||||||
1982 | 0.41 | 0.40 | 0.51 | 0.54 | 0.31 | 0.71 | 1.00 | 0.24 | 0.90 | d | 0.79 | 1.07 | 1.75 | 8.63 | ||||||||||||
1983 | 1.22 | 1.76 | 1.78 | 0.63 | 0.32 | 0.28 | 0.59 | 0.33 | 0.41 | 0.27 | 3.63 | 0.82 | a | 12.04 | ||||||||||||
1984 | 0.34 | 0.77 | 0.96 | 0.89 | 0.93 | 1.90 | 0.29 | 0.00 | 1.09 | 0.33 | 2.30 | 0.44 | 10.24 | |||||||||||||
1985 | 0.50 | 0.85 | 0.32 | 0.00 | 0.31 | 0.31 | 0.00 | 0.00 | 0.89 | 0.36 | 0.90 | 0.95 | 5.39 | |||||||||||||
1986 | 1.76 | 1.27 | 0.72 | 0.21 | 0.02 | 0.04 | 0.13 | 0.06 | 1.68 | 0.48 | 0.69 | 0.79 | 7.85 | |||||||||||||
1987 | 1.17 | 0.38 | 1.34 | 0.10 | 0.24 | 0.71 | 1.28 | 0.02 | 0.02 | 0.00 | 0.43 | 3.10 | 8.79 | |||||||||||||
1988 | 0.67 | 0.00 | 0.37 | 0.59 | 0.46 | 0.14 | 0.00 | 0.00 | 0.28 | 0.03 | 1.15 | 0.57 | 4.26 | |||||||||||||
1989 | 0.27 | 1.58 | 1.13 | 0.91 | 0.91 | 0.00 | 0.02 | 0.28 | 0.00 | 0.61 | 1.22 | 0.08 | 7.01 | |||||||||||||
1990 | 0.74 | 0.55 | 0.50 | 0.22 | 1.36 | 0.38 | 0.64 | 1.20 | 0.00 | 0.73 | 0.03 | 0.25 | 6.60 | |||||||||||||
1991 | 0.11 | 0.07 | 1.68 | 0.41 | 0.93 | 1.84 | 0.29 | 0.11 | 0.00 | 0.30 | 1.61 | a | 0.33 | 7.68 | ||||||||||||
1992 | 0.41 | 0.75 | 0.41 | 0.93 | 0.00 | 1.03 | 1.74 | 0.00 | 0.01 | 0.39 | 1.18 | 3.12 | 9.97 | |||||||||||||
1993 | 1.50 | 0.52 | 0.50 | 1.08 | 0.23 | a | 0.47 | 0.49 | 0.05 | 0.09 | 0.02 | 0.08 | 1.62 | 6.65 | ||||||||||||
1994 | 0.56 | 0.82 | 0.09 | 0.85 | 0.50 | 0.32 | 0.18 | 0.23 | 0.04 | 0.88 | 1.13 | 1.28 | a | 6.88 | ||||||||||||
1995 | 2.45 | 0.53 | 1.25 | 0.77 | 0.81 | 0.43 | 0.64 | 0.06 | 0.55 | 0.43 | 1.77 | 2.17 | 11.86 | |||||||||||||
1996 | 0.80 | 1.29 | 0.74 | 0.45 | 0.77 | 0.36 | 0.11 | 0.00 | 0.43 | 1.16 | 0.86 | 2.52 | 9.49 | |||||||||||||
1997 | 1.06 | 0.75 | 0.94 | 0.35 | 1.81 | 1.12 | 0.66 | 0.25 | 0.42 | 1.11 | 0.72 | 0.23 | 9.42 | |||||||||||||
1998 | 0.95 | 1.18 | 0.89 | 0.21 | 1.24 | 0.43 | 1.93 | 0.00 | 0.44 | 0.18 | 1.70 | 1.63 | 10.78 | |||||||||||||
1999 | 1.29 | 1.43 | 0.40 | 0.02 | 0.55 | 0.28 | 0.27 | 1.21 | 0.00 | 0.27 | 0.76 | 0.45 | 6.93 | |||||||||||||
2000 | 0.97 | 1.34 | 0.91 | 0.52 | 0.92 | 0.37 | 0.08 | 0.00 | 0.14 | 0.33 | 0.97 | 0.87 | 7.42 | |||||||||||||
2001 | 0.38 | 0.71 | a | 0.99 | 0.52 | 0.10 | 0.99 | a | 0.01 | 0.05 | 0.08 | 0.52 | 1.92 | 1.02 | 7.29 | |||||||||||
2002 | 0.37 | 0.56 | 0.06 | 0.44 | 0.24 | 0.68 | 0.21 | 0.00 | 0.02 | 0.13 | 0.32 | 2.37 | 5.40 | |||||||||||||
2003 | 2.49 | 0.46 | 0.35 | 0.81 | 0.20 | 0.00 | 0.00 | 0.31 | 0.21 | 0.23 | 0.37 | 0.81 | 6.24 | |||||||||||||
2004 | 0.55 | 0.67 | 0.47 | 0.29 | 0.72 | 0.51 | 0.28 | 0.75 | 0.40 | 1.25 | 0.00 | 0.62 | 6.51 | |||||||||||||
2005 | 0.45 | 0.01 | 0.55 | 0.22 | 1.49 | 0.95 | 0.19 | 0.16 | 0.34 | 0.97 | 1.79 | 1.65 | 8.77 | |||||||||||||
2006 | 2.24 | 0.80 | 0.35 | 0.96 | 0.54 | 0.85 | 0.08 | 0.00 | 0.37 | 0.33 | 1.08 | 1.75 | 9.35 | |||||||||||||
2007 | 0.21 | 0.76 | 0.56 | 0.29 | 0.59 | 0.66 | 0.10 | 0.10 | 0.38 | 0.35 | 0.71 | 1.13 | 5.84 | |||||||||||||
2008 | 0.57 | 0.22 | 0.34 | 0.15 | 0.07 | 0.22 | 0.01 | 0.25 | 0.01 | 0.42 | 0.61 | 0.49 | 3.36 | |||||||||||||
2009 | 0.49 | 0.51 | 0.50 | 0.16 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.66 | h | ||||
2010 | ----- | z | ----- | z | 0.19 | t | 0.90 | 1.45 | 1.84 | 0.05 | 0.01 | 0.62 | 1.02 | 0.98 | 1.27 | 8.14 | c | |||||||||
2011 | 0.49 | 0.07 | 0.99 | 0.23 | 1.65 | 0.40 | 0.26 | 0.00 | 0.03 | 0.40 | 0.11 | 0.21 | 4.84 | |||||||||||||
2012 | 0.24 | 0.67 | 0.98 | 0.70 | 0.18 | 1.32 | 0.87 | 0.00 | 0.00 | 1.02 | 1.06 | 1.69 | 8.73 | |||||||||||||
2013 | 0.19 | 0.16 | 0.54 | 0.63 | 0.70 | 1.39 | 0.00 | 0.63 | 0.70 | 0.14 | 0.58 | 0.01 | 5.67 | |||||||||||||
2014 | 0.31 | 0.66 | 0.79 | 0.95 | 0.09 | 0.26 | 0.00 | 0.83 | 0.29 | 1.14 | 0.90 | 0.75 | 6.97 | |||||||||||||
2015 | 0.71 | 0.59 | 1.01 | 0.57 | 1.18 | 0.00 | 0.05 | 0.09 | 0.16 | 0.28 | 0.19 | 2.25 | 7.08 | |||||||||||||
2016 | 1.64 | 0.38 | 1.60 | 0.55 | 0.53 | 1.27 | 0.32 | 0.00 | 0.07 | 2.52 | 0.76 | 0.32 | 9.96 | |||||||||||||
2017 | 0.96 | 1.31 | 1.12 | 1.36 | 0.76 | 0.24 | 0.00 | 0.06 | 0.09 | 0.75 | 1.42 | 0.41 | 8.48 | |||||||||||||
2018 | 1.41 | 0.44 | 0.46 | 1.37 | 1.13 | 0.19 | 0.00 | 0.00 | 0.00 | 1.00 | 0.64 | 0.97 | 7.61 | |||||||||||||
2019 | 0.63 | 0.35 | 0.41 | 0.65 | 0.83 | 0.44 | 0.12 | 0.29 | 0.37 | b | 0.58 | 0.13 | 0.64 | 5.44 | ||||||||||||
2020 | 1.11 | 0.14 | 0.56 | 0.09 | 1.73 | 0.76 | 0.00 | 0.00 | 0.20 | 0.39 | 0.72 | 0.88 | 6.58 | |||||||||||||
2021 | 1.04 | 0.25 | 0.03 | 0.07 | 0.22 | 0.22 | 0.00 | 0.76 | 0.85 | 0.77 | 1.17 | 0.26 | 5.64 | |||||||||||||
2022 | 0.36 | 0.15 | 0.43 | 0.36 | 0.36 | a | 1.49 | 0.37 | 0.00 | 0.00 | 0.13 | 1.03 | 1.37 | 6.05 | ||||||||||||
2023 | 1.18 | 0.12 | 0.52 | 1.42 | 0.53 | 0.06 | 0.09 | 0.98 | 0.27 | 0.43 | 0.88 | 1.30 | a | 7.78 | ||||||||||||
2024 | 1.36 | 0.31 | 0.59 | 0.33 | 0.03 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.59 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.90 | 0.66 | 0.68 | 0.53 | 0.61 | 0.60 | 0.29 | 0.24 | 0.31 | 0.57 | 0.96 | 1.12 | 7.44 | |||||||||||||
S.D. | 0.60 | 0.47 | 0.46 | 0.39 | 0.49 | 0.51 | 0.40 | 0.33 | 0.35 | 0.51 | 0.65 | 0.72 | 1.89 | |||||||||||||
SKEW | 1.01 | 0.73 | 0.84 | 0.63 | 0.86 | 0.83 | 2.11 | 1.47 | 1.67 | 1.41 | 1.18 | 0.58 | 0.33 | |||||||||||||
MAX | 2.49 | 1.96 | 2.05 | 1.43 | 1.83 | 1.90 | 1.93 | 1.21 | 1.68 | 2.52 | 3.63 | 3.12 | 12.44 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 3.00 | |||||||||||||
YRS | 75 | 75 | 75 | 76 | 74 | 74 | 74 | 74 | 74 | 74 | 74 | 74 | 73 |