YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1933 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.33 | 0.23 | 0.48 | 0.14 | 0.57 | 0.00 | ----- | z | ||||||
1934 | 0.48 | 0.67 | 0.09 | 0.13 | 0.05 | 0.06 | 0.15 | 0.74 | 0.32 | 0.00 | 0.44 | 0.91 | 0.91 | |||||||||||||
1935 | 0.42 | 0.66 | 0.52 | 0.07 | 0.05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||||
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1937 | ----- | z | 0.24 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 0.50 | ----- | z | |||
1938 | 0.30 | 0.32 | 0.76 | 0.01 | 0.00 | 0.25 | 0.05 | 0.40 | 0.00 | 0.00 | 0.00 | 0.72 | 0.76 | |||||||||||||
1939 | 0.15 | 0.31 | 0.09 | 0.10 | 0.00 | 0.00 | ----- | z | 0.87 | 1.88 | ----- | z | ----- | z | ----- | z | ----- | z | ||||||||
1940 | ----- | z | ----- | z | 0.00 | ----- | z | 0.00 | 0.00 | 0.20 | 0.40 | 1.01 | 0.50 | 0.18 | 1.49 | ----- | z | |||||||||
1941 | 0.42 | 0.65 | 1.01 | a | 0.92 | 0.51 | 0.00 | 0.22 | 0.45 | 0.88 | 0.47 | 0.84 | 0.45 | 1.01 | a | |||||||||||
1942 | 0.18 | 0.12 | 0.22 | 0.49 | 0.00 | 0.00 | 0.54 | 0.79 | 0.05 | 0.28 | 0.00 | 0.29 | 0.79 | |||||||||||||
1943 | 0.57 | 0.05 | 0.55 | 0.03 | 0.01 | 0.02 | 0.14 | 2.99 | 0.62 | 0.19 | 0.00 | 0.60 | 2.99 | |||||||||||||
1944 | 0.37 | 0.92 | 0.56 | 0.38 | 0.84 | 0.00 | 0.46 | 0.06 | 0.21 | 0.12 | 0.40 | 1.08 | 1.08 | |||||||||||||
1945 | 0.37 | 0.04 | ----- | z | ----- | z | ----- | z | ----- | z | 1.05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |||
1946 | ----- | z | 0.14 | 0.02 | 0.01 | u | 0.00 | 0.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ||||
1947 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.22 | ----- | z | |
1948 | 0.00 | 0.63 | 0.13 | 0.00 | 0.00 | 0.08 | 0.47 | 0.17 | 0.00 | 0.35 | 0.00 | 0.31 | 0.63 | |||||||||||||
1949 | 0.69 | 0.08 | 0.25 | 0.18 | 0.09 | 0.31 | 0.25 | 0.46 | 0.87 | 0.66 | 0.31 | 0.28 | 0.87 | |||||||||||||
1950 | 0.22 | 0.73 | 0.14 | 0.00 | 0.00 | 0.11 | 0.35 | 0.21 | 0.29 | 0.00 | 0.04 | 0.03 | 0.73 | |||||||||||||
1951 | 1.18 | 0.15 | 0.36 | 0.27 | 0.17 | 0.00 | 0.70 | 2.73 | 0.33 | 0.31 | 0.70 | 0.20 | 2.73 | |||||||||||||
1952 | 0.38 | 0.20 | 0.59 | 0.71 | 0.00 | 0.04 | 0.22 | 1.03 | 0.20 | 0.00 | 1.07 | 0.34 | 1.07 | |||||||||||||
1953 | 0.17 | 0.30 | 0.38 | 0.02 | 0.70 | 0.00 | 0.32 | 0.19 | 0.00 | 0.00 | 0.07 | 0.07 | 0.70 | |||||||||||||
1954 | 0.59 | 0.56 | 0.81 | 0.02 | 0.11 | 0.02 | 0.15 | 0.18 | 0.30 | 0.08 | 0.00 | 0.01 | 0.81 | |||||||||||||
1955 | 0.67 | 0.09 | 0.00 | 0.00 | 0.02 | 0.92 | 1.15 | 0.51 | 0.00 | 0.13 | 0.03 | 0.18 | 1.15 | |||||||||||||
1956 | 0.51 | 0.34 | 0.00 | 0.03 | 0.00 | 0.01 | 0.61 | 0.26 | 0.02 | 0.05 | 0.00 | 0.01 | 0.61 | |||||||||||||
1957 | 0.39 | 0.13 | 0.24 | 0.08 | 0.22 | 0.26 | 0.58 | 0.32 | 0.00 | 1.05 | 0.01 | 0.12 | 1.05 | |||||||||||||
1958 | 0.06 | 0.89 | 0.90 | 0.67 | 0.07 | 0.03 | 0.30 | 0.32 | 1.52 | 0.45 | 0.16 | 0.00 | 1.52 | |||||||||||||
1959 | 0.16 | 0.39 | 0.00 | 0.05 | 0.00 | 0.00 | 0.45 | 0.59 | 0.04 | 1.00 | 0.34 | 0.71 | 1.00 | |||||||||||||
1960 | 0.41 | 0.03 | 0.57 | 0.00 | 0.00 | 0.00 | 0.24 | 0.34 | 0.11 | 0.42 | 0.00 | 0.07 | 0.57 | |||||||||||||
1961 | 0.10 | 0.01 | 0.17 | 0.00 | 0.00 | 0.00 | 0.21 | 0.62 | 0.20 | 0.05 | 0.09 | 0.55 | 0.62 | |||||||||||||
1962 | 0.71 | 0.21 | 0.20 | 0.00 | 0.00 | 0.08 | 0.10 | 0.24 | 0.17 | 0.00 | 0.03 | 0.29 | 0.71 | |||||||||||||
1963 | 0.42 | 0.81 | 0.28 | 0.33 | 0.00 | 0.00 | 0.03 | 0.51 | 0.00 | 1.03 | 0.24 | 0.00 | 1.03 | |||||||||||||
1964 | 0.21 | 0.01 | 0.15 | 0.10 | 0.00 | 0.00 | 0.22 | 0.54 | 1.50 | 0.10 | 0.21 | 0.67 | 1.50 | |||||||||||||
1965 | 0.76 | 0.76 | 0.52 | 0.69 | 0.16 | 0.84 | 0.07 | 0.16 | 0.42 | 0.19 | 0.28 | 0.96 | 0.96 | |||||||||||||
1966 | 0.32 | 0.46 | 0.24 | 0.00 | 0.00 | 0.21 | 0.04 | 1.73 | 1.25 | 0.16 | 0.36 | 0.46 | 1.73 | |||||||||||||
1967 | 0.25 | 0.00 | 0.42 | 0.07 | 0.03 | 0.25 | 0.53 | 0.01 | 0.08 | 0.66 | 0.51 | 1.43 | 1.43 | |||||||||||||
1968 | 0.12 | 0.59 | 0.64 | 0.00 | 0.00 | 0.00 | 0.81 | 0.26 | 0.00 | 0.35 | 0.52 | 0.37 | 0.81 | |||||||||||||
1969 | 0.77 | 0.20 | 0.52 | 0.02 | 0.15 | 0.00 | 0.20 | 0.05 | 1.33 | 0.08 | 0.20 | 0.34 | 1.33 | |||||||||||||
1970 | 0.00 | 0.23 | 0.74 | 0.00 | 0.00 | 0.00 | 0.26 | 0.45 | 2.43 | 0.34 | 0.02 | 0.12 | 2.43 | |||||||||||||
1971 | 0.22 | 0.30 | 0.00 | 0.13 | 0.00 | 0.00 | 0.14 | 0.30 | 0.69 | 0.14 | 0.00 | 0.24 | 0.69 | |||||||||||||
1972 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.37 | 0.39 | 0.68 | 0.21 | 1.69 | 0.58 | 0.79 | 1.69 | |||||||||||||
1973 | 0.03 | 0.73 | 0.58 | 0.07 | 0.10 | 0.00 | 1.02 | 0.00 | 0.00 | 0.00 | 0.51 | 0.00 | 1.02 | |||||||||||||
1974 | 0.22 | 0.02 | 0.86 | 0.01 | 0.00 | 0.00 | 0.33 | 1.04 | 0.36 | 0.92 | 0.44 | 0.27 | 1.04 | |||||||||||||
1975 | 0.02 | 0.26 | 0.25 | 0.22 | 0.00 | 0.00 | 0.36 | 0.00 | 0.79 | 0.22 | 0.48 | 0.67 | 0.79 | |||||||||||||
1976 | 0.00 | 0.36 | 0.40 | 0.38 | 0.91 | 0.09 | 0.96 | 0.09 | 0.72 | 0.52 | 0.40 | 0.80 | 0.96 | |||||||||||||
1977 | 0.15 | 0.06 | 0.17 | 0.06 | 0.10 | 0.10 | 0.24 | 0.16 | 0.50 | 0.34 | 0.00 | 0.45 | 0.50 | |||||||||||||
1978 | 0.80 | 0.69 | 0.64 | 0.14 | 0.00 | 0.01 | 0.76 | 1.24 | 0.00 | 0.26 | 0.79 | 1.02 | 1.24 | |||||||||||||
1979 | 0.73 | 0.05 | 0.85 | 0.01 | 0.73 | 0.04 | 0.30 | 0.84 | 0.08 | 0.09 | 0.11 | 0.13 | 0.85 | |||||||||||||
1980 | 0.51 | 0.79 | 0.33 | 0.17 | 0.21 | 0.03 | 0.32 | 0.06 | 0.07 | 0.02 | 0.00 | 0.06 | 0.79 | |||||||||||||
1981 | 0.48 | 0.88 | 0.57 | 0.20 | 0.03 | 0.00 | 0.67 | 0.09 | 0.13 | 0.73 | 0.45 | 0.00 | 0.88 | |||||||||||||
1982 | 0.32 | 0.17 | 0.34 | 0.00 | 0.38 | 0.00 | 0.18 | 0.65 | 0.09 | 0.00 | 0.78 | 0.68 | 0.78 | |||||||||||||
1983 | 0.46 | 0.47 | 1.98 | 0.09 | 0.00 | 0.00 | 0.26 | 1.32 | 1.66 | 0.62 | 0.23 | 0.41 | 1.98 | |||||||||||||
1984 | 0.31 | 0.00 | 0.00 | 0.56 | 0.18 | 0.18 | 1.90 | 0.44 | 1.21 | 0.23 | 0.33 | 1.05 | 1.90 | |||||||||||||
1985 | 0.43 | 0.06 | 0.24 | 0.07 | 0.00 | 0.00 | 0.35 | 0.21 | 0.92 | 0.56 | 0.98 | 0.86 | 0.98 | |||||||||||||
1986 | 0.05 | 0.44 | 0.50 | 0.01 | 0.00 | 0.01 | 0.46 | 0.70 | 0.44 | 0.27 | 0.03 | 0.59 | 0.70 | |||||||||||||
1987 | 0.30 | 1.46 | 0.20 | 0.06 | 0.06 | 0.01 | 0.93 | 0.20 | 0.41 | 0.14 | 0.99 | 1.35 | 1.46 | |||||||||||||
1988 | 0.36 | 0.11 | 0.17 | 0.38 | 0.00 | 0.02 | 0.64 | 0.21 | 0.00 | 2.32 | 0.49 | 0.08 | 2.32 | |||||||||||||
1989 | 0.63 | 0.00 | 1.19 | 0.00 | 0.00 | 0.00 | 0.03 | 0.63 | 0.35 | 0.37 | 0.10 | 0.17 | 1.19 | |||||||||||||
1990 | 0.57 | 0.35 | 0.17 | 0.17 | 0.14 | 0.04 | 0.39 | 1.20 | 0.44 | 0.04 | 0.11 | 0.17 | 1.20 | |||||||||||||
1991 | 0.32 | 0.45 | 0.52 | 0.00 | 0.00 | 0.00 | 0.13 | 0.06 | 0.73 | 1.12 | 0.52 | 0.59 | 1.12 | |||||||||||||
1992 | 0.63 | 0.33 | 0.66 | 0.46 | 0.46 | 0.02 | 1.66 | 0.50 | 0.03 | 0.18 | 0.03 | 1.06 | 1.66 | |||||||||||||
1993 | 1.22 | 0.83 | 0.80 | 0.00 | 0.07 | 0.01 | 0.00 | 0.25 | 0.06 | 1.17 | 1.58 | 0.02 | 1.58 | |||||||||||||
1994 | 0.13 | 0.38 | 0.64 | 0.09 | 0.34 | 0.00 | 0.18 | 0.01 | 1.36 | 0.55 | 0.68 | 0.83 | 1.36 | |||||||||||||
1995 | 0.65 | 0.09 | 0.51 | 0.11 | 0.09 | 0.00 | 0.00 | 1.59 | 0.58 | 0.00 | 1.25 | 0.01 | 1.59 | |||||||||||||
1996 | 0.13 | 0.47 | 0.32 | 0.00 | 0.00 | 0.00 | 0.50 | 0.19 | 0.22 | 0.25 | 0.14 | 0.02 | 0.50 | |||||||||||||
1997 | 0.70 | 0.38 | 0.01 | 0.16 | 0.00 | 0.00 | 0.14 | 0.45 | 0.22 | 0.07 | 0.03 | 0.23 | 0.70 | |||||||||||||
1998 | 0.35 | 0.77 | 0.39 | 0.26 | 0.04 | 0.00 | 1.02 | 0.60 | 0.40 | 0.36 | 0.18 | 0.42 | 1.02 | |||||||||||||
1999 | 0.01 | 0.16 | 0.07 | 0.53 | 0.00 | 0.00 | 1.24 | 0.56 | 1.06 | 0.00 | 0.00 | 0.00 | 1.24 | |||||||||||||
2000 | 0.01 | 0.00 | 1.53 | 0.00 | 0.00 | 0.15 | 0.23 | 0.21 | 0.01 | 0.94 | 0.50 | 0.00 | 1.53 | |||||||||||||
2001 | 0.69 | 0.28 | 0.71 | 0.74 | 0.02 | 0.01 | 0.20 | 0.40 | 0.00 | 0.02 | 0.20 | 0.54 | 0.74 | |||||||||||||
2002 | 0.05 | 0.00 | 0.08 | 0.06 | 0.00 | 0.00 | 0.77 | 0.00 | 0.20 | 0.28 | 0.39 | 0.11 | 0.77 | |||||||||||||
2003 | 0.41 | 1.42 | 0.31 | 0.17 | 0.00 | 0.00 | 0.61 | 0.20 | 0.14 | 0.21 | 0.64 | 0.10 | 1.42 | |||||||||||||
2004 | 0.35 | 0.94 | 1.11 | 0.68 | 0.00 | 0.00 | 0.26 | 0.27 | 0.08 | 0.45 | 0.28 | 0.45 | 1.11 | |||||||||||||
2005 | 0.82 | 0.93 | 0.18 | 0.12 | 0.00 | 0.00 | 0.14 | 0.59 | 0.13 | 0.12 | 0.00 | 0.00 | 0.93 | |||||||||||||
2006 | 0.00 | 0.00 | 1.40 | 0.00 | 0.00 | 0.00 | 1.04 | 0.54 | 0.45 | 0.08 | 0.00 | 0.26 | 1.40 | |||||||||||||
2007 | 0.25 | 0.31 | 0.80 | 0.08 | 0.00 | 0.00 | 0.22 | 0.24 | 0.07 | 0.04 | 1.23 | 0.69 | 1.23 | |||||||||||||
2008 | 0.87 | 0.21 | 0.00 | 0.00 | 0.28 | 0.00 | 1.30 | 0.94 | 0.00 | 0.00 | 0.31 | 0.30 | 1.30 | |||||||||||||
2009 | 0.10 | 0.69 | 0.00 | 0.19 | 0.13 | 0.02 | 0.36 | 0.28 | 0.16 | 0.00 | 0.01 | 0.29 | 0.69 | |||||||||||||
2010 | 1.33 | 0.70 | 0.52 | 0.04 | 0.00 | 0.00 | 1.33 | 0.14 | 0.13 | 0.36 | 0.01 | 0.47 | 1.33 | |||||||||||||
2011 | 0.03 | 0.32 | 0.06 | 0.27 | 0.01 | 0.00 | 0.74 | 0.17 | 0.02 | 0.06 | 0.25 | 0.49 | 0.74 | |||||||||||||
2012 | 0.00 | 0.00 | 0.25 | 0.05 | 0.03 | 0.00 | 0.24 | 0.80 | 0.51 | 0.00 | 0.05 | 0.43 | 0.80 | |||||||||||||
2013 | 1.18 | 0.23 | 0.84 | 0.06 | 0.00 | 0.00 | 0.89 | 0.34 | 0.50 | 0.00 | 1.60 | 0.23 | 1.60 | |||||||||||||
2014 | 0.00 | 0.00 | 0.94 | 0.00 | 0.00 | 0.00 | 0.03 | 0.44 | 3.30 | 0.08 | 0.00 | 0.61 | 3.30 | |||||||||||||
2015 | 0.35 | 0.01 | 0.23 | 0.14 | 0.93 | 0.16 | 0.72 | 0.37 | 0.41 | 0.32 | 0.17 | 0.16 | 0.93 | |||||||||||||
2016 | 0.60 | 0.00 | 0.00 | 0.26 | 0.05 | 0.01 | 0.53 | 0.52 | 0.26 | 0.20 | 0.35 | 0.42 | 0.60 | |||||||||||||
2017 | 0.86 | 0.63 | 0.06 | 0.00 | 0.01 | 0.00 | 0.38 | 0.92 | 0.00 | 0.00 | 0.00 | 0.16 | 0.92 | |||||||||||||
2018 | 0.16 | 0.28 | 0.04 | 0.00 | 0.00 | 0.00 | 0.56 | 0.56 | 0.19 | 2.36 | 0.26 | 0.14 | 2.36 | |||||||||||||
2019 | 0.48 | 1.01 | 0.23 | 0.08 | 0.06 | 0.00 | 0.13 | 0.14 | 0.17 | 0.00 | 0.70 | 0.22 | 1.01 | |||||||||||||
2020 | 0.19 | 1.04 | 0.67 | 0.08 | 0.00 | 0.00 | 0.10 | 0.90 | 0.00 | 0.00 | 0.00 | 0.44 | 1.04 | |||||||||||||
2021 | 0.29 | 0.00 | 0.19 | 0.01 | 0.00 | 0.17 | 0.80 | 0.64 | 0.43 | 0.28 | 0.00 | 1.00 | 1.00 | |||||||||||||
2022 | 0.07 | 0.28 | 0.09 | 0.00 | 0.00 | 0.18 | 0.17 | 0.58 | 0.62 | 0.62 | 0.04 | 0.76 | 0.76 | |||||||||||||
2023 | 0.43 | 0.13 | 0.74 | 0.00 | 0.00 | 0.00 | 0.00 | 0.06 | 0.02 | 0.00 | 0.14 | 0.70 | 0.74 | |||||||||||||
2024 | 0.41 | 0.38 | 0.50 | 0.40 | 0.01 | 0.01 | 0.33 | 0.24 | 0.00 | 0.00 | y | ----- | z | ----- | z | ----- | z | |||||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.38 | 0.37 | 0.42 | 0.15 | 0.10 | 0.07 | 0.45 | 0.51 | 0.44 | 0.34 | 0.32 | 0.42 | 1.16 | |||||||||||||
S.D. | 0.31 | 0.34 | 0.38 | 0.21 | 0.21 | 0.20 | 0.39 | 0.51 | 0.58 | 0.46 | 0.37 | 0.36 | 0.55 | |||||||||||||
SKEW | 0.91 | 0.96 | 1.34 | 1.75 | 2.75 | 4.60 | 1.39 | 2.61 | 2.33 | 2.47 | 1.54 | 0.93 | 1.73 | |||||||||||||
MAX | 1.33 | 1.46 | 1.98 | 0.92 | 0.93 | 1.37 | 1.90 | 2.99 | 3.30 | 2.36 | 1.60 | 1.49 | 3.30 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.50 | |||||||||||||
YRS | 86 | 88 | 87 | 85 | 87 | 86 | 86 | 86 | 86 | 84 | 85 | 86 | 82 |