YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1939 | 1.49 | 0.19 | 0.53 | 0.80 | ----- | z | 0.16 | 5.77 | 2.81 | 0.91 | 1.49 | 0.13 | 0.62 | 14.90 | a | |||||||||||
1940 | 0.40 | 0.45 | 0.46 | 0.90 | 3.85 | 1.43 | 0.33 | 1.36 | 0.21 | 0.13 | 0.96 | 0.32 | 10.80 | |||||||||||||
1941 | 0.45 | 0.53 | 2.96 | 2.67 | 5.48 | 3.27 | 4.88 | 2.06 | 12.05 | 6.23 | 0.16 | 0.23 | 40.97 | |||||||||||||
1942 | 0.05 | 0.10 | 0.12 | 3.51 | 0.86 | 1.49 | 3.16 | 5.66 | 2.15 | 0.99 | 0.00 | 0.77 | 18.86 | |||||||||||||
1943 | 0.05 | 0.03 | 0.33 | 0.02 | 1.53 | 2.38 | 2.47 | 0.15 | 1.12 | 0.15 | 0.25 | 1.25 | 9.73 | |||||||||||||
1944 | 0.47 | 0.43 | 0.02 | 0.53 | 1.31 | 0.53 | 1.22 | 1.68 | 1.27 | 2.70 | 0.50 | 0.64 | 11.30 | |||||||||||||
1945 | 0.78 | 0.07 | 0.00 | 0.16 | 0.37 | 0.11 | 1.26 | 1.91 | 1.03 | 0.26 | 0.00 | 0.07 | 6.02 | |||||||||||||
1946 | 0.44 | 0.02 | 0.17 | 0.17 | 0.76 | 0.27 | 2.56 | 1.38 | 3.83 | 0.88 | 0.46 | 0.65 | 11.59 | |||||||||||||
1947 | 0.21 | 0.00 | 0.43 | 0.40 | 3.96 | 0.08 | 2.02 | 1.85 | 0.01 | 0.86 | 0.39 | 0.81 | 11.02 | |||||||||||||
1948 | 0.49 | 1.08 | 0.45 | 0.22 | 0.74 | 0.91 | 1.35 | 1.92 | 0.10 | 0.86 | 0.16 | 0.19 | 8.47 | |||||||||||||
1949 | 0.94 | 0.50 | 0.04 | 0.78 | 1.67 | 2.59 | 3.60 | 1.06 | 4.04 | 0.44 | 0.04 | 0.23 | a | 15.93 | ||||||||||||
1950 | 0.00 | 0.19 | 0.00 | 0.00 | 0.05 | 1.45 | 5.45 | 0.12 | 2.84 | 0.45 | 0.00 | 0.01 | 10.56 | |||||||||||||
1951 | 0.28 | 0.27 | 0.17 | 0.15 | 0.63 | 0.01 | 1.43 | 1.12 | 0.49 | 0.54 | 0.32 | 0.42 | 5.83 | |||||||||||||
1952 | 0.17 | 0.23 | 0.00 | 0.45 | 0.14 | 1.07 | 4.78 | 1.94 | 0.99 | 0.00 | 1.19 | 0.24 | 11.20 | |||||||||||||
1953 | 0.02 | 0.12 | 0.09 | 0.05 | 1.86 | 0.00 | 2.79 | 1.49 | 0.01 | 0.37 | c | 0.64 | 0.36 | 7.80 | ||||||||||||
1954 | 0.12 | 0.03 | 0.02 | 0.31 | 0.34 | 0.07 | 0.95 | 2.43 | 1.84 | 3.16 | 0.10 | 0.00 | 9.37 | |||||||||||||
1955 | 0.17 | 0.06 | 0.04 | 0.50 | 0.36 | 0.05 | 3.85 | 1.50 | 2.11 | 1.08 | 0.00 | 0.07 | 9.79 | |||||||||||||
1956 | 0.01 | 0.59 | 0.00 | 0.05 | 0.53 | 0.21 | 1.67 | 0.74 | 0.00 | 0.12 | 0.03 | 0.00 | 3.95 | |||||||||||||
1957 | 0.07 | 0.61 | 1.01 | 0.56 | 1.66 | 0.03 | 1.91 | 2.16 | 0.17 | 1.87 | 0.40 | 0.03 | 10.48 | |||||||||||||
1958 | 0.83 | 0.02 | 2.16 | 0.94 | 0.25 | 1.08 | 2.24 | 3.59 | 5.03 | 1.00 | 0.00 | 0.05 | 17.19 | |||||||||||||
1959 | 0.05 | 0.04 | 0.45 | 0.50 | 2.15 | 2.57 | 1.27 | 3.11 | 0.07 | 1.40 | 0.00 | 1.15 | 12.76 | |||||||||||||
1960 | 0.75 | 0.18 | 0.08 | 0.00 | 1.30 | 2.51 | 9.93 | 0.59 | 1.42 | 4.21 | 0.00 | 1.48 | 22.45 | |||||||||||||
1961 | 0.22 | 0.09 | 0.92 | 0.92 | 0.15 | 0.29 | 1.25 | 2.46 | 1.97 | 1.03 | 0.74 | 0.80 | 10.84 | |||||||||||||
1962 | 0.31 | 0.03 | 0.19 | 0.12 | 0.04 | 1.74 | 3.85 | 0.46 | 1.43 | 0.78 | 1.07 | 0.63 | 10.65 | |||||||||||||
1963 | 0.29 | 0.99 | 0.06 | 1.06 | 0.45 | 4.67 | 1.14 | 4.90 | 0.18 | 0.58 | 0.11 | 0.18 | 14.61 | |||||||||||||
1964 | 0.04 | 0.26 | 0.08 | 0.00 | 0.06 | 0.18 | 1.72 | 1.50 | 1.62 | 0.00 | 0.51 | 0.13 | 6.10 | |||||||||||||
1965 | 0.00 | 0.30 | 0.74 | 1.34 | 3.56 | 0.73 | 1.77 | 1.10 | 1.19 | 0.16 | 0.00 | 0.33 | 11.22 | |||||||||||||
1966 | 0.40 | 0.05 | 0.00 | 0.03 | 0.79 | 3.26 | 0.86 | 4.27 | 0.18 | 0.00 | 0.08 | 0.11 | 10.03 | |||||||||||||
1967 | 0.00 | 0.20 | 0.28 | 0.02 | 0.51 | 1.38 | 1.98 | 4.18 | 0.07 | 0.04 | 0.49 | 0.52 | 9.67 | |||||||||||||
1968 | 0.69 | 0.27 | 1.01 | 0.69 | 0.47 | 0.28 | 5.03 | 4.91 | 0.00 | 0.89 | 0.45 | 0.04 | 14.73 | |||||||||||||
1969 | 0.00 | 0.56 | 0.51 | 0.97 | 1.78 | 1.09 | 1.88 | 3.10 | 4.66 | 2.97 | 0.02 | 0.49 | 18.03 | |||||||||||||
1970 | 0.00 | 0.20 | 0.20 | 1.32 | 0.12 | 1.68 | 4.11 | 0.85 | 2.53 | 0.76 | 0.07 | 0.00 | 11.84 | |||||||||||||
1971 | 0.21 | 0.10 | 0.00 | 0.12 | 0.27 | 0.43 | 1.19 | 1.86 | 1.93 | 1.50 | 0.89 | 0.77 | 9.27 | |||||||||||||
1972 | 0.02 | 0.07 | 0.05 | 0.00 | 0.89 | 2.42 | 7.26 | 4.74 | 1.76 | 2.61 | 1.05 | ----- | z | 20.87 | a | |||||||||||
1973 | 0.00 | b | 0.46 | 1.73 | 0.98 | 0.87 | 0.83 | 2.48 | a | 0.74 | 0.12 | 1.37 | 0.03 | 0.14 | 9.75 | |||||||||||
1974 | 0.34 | 0.30 | 0.19 | 0.02 | 0.00 | 0.08 | 1.32 | 1.88 | 2.76 | 2.82 | 0.51 | 0.53 | 10.75 | |||||||||||||
1975 | 0.11 | ----- | z | 0.43 | 0.45 | 0.35 | 0.17 | 3.55 | 0.86 | 3.07 | 0.00 | 0.37 | 0.13 | 9.49 | a | |||||||||||
1976 | 0.04 | 0.39 | 0.05 | 0.30 | 1.79 | 1.60 | 2.84 | 1.27 | 2.15 | 0.29 | 0.37 | 0.00 | 11.09 | |||||||||||||
1977 | 0.18 | 0.50 | 0.53 | 1.69 | 2.66 | 2.02 | 1.77 | 4.00 | 2.08 | 1.98 | 0.73 | 0.02 | 18.16 | |||||||||||||
1978 | 0.64 | 0.57 | 0.25 | 0.14 | 2.04 | 4.81 | 0.73 | 1.48 | 2.23 | 1.07 | 1.94 | 0.69 | 16.59 | |||||||||||||
1979 | 0.54 | 0.23 | 0.26 | 0.47 | 4.74 | 3.15 | 1.79 | 2.98 | 0.96 | 0.40 | 0.36 | 0.21 | 16.09 | |||||||||||||
1980 | 0.03 | 0.72 | 0.53 | 0.39 | 1.40 | 1.19 | 0.00 | 1.94 | 3.54 | 0.09 | 0.56 | 0.00 | 10.39 | |||||||||||||
1981 | 0.20 | 0.00 | 0.76 | 0.29 | 1.09 | 1.34 | 1.91 | 3.99 | 1.34 | 1.46 | 0.16 | 0.00 | 12.54 | |||||||||||||
1982 | 0.39 | 0.04 | 0.21 | 0.10 | 0.18 | 0.24 | 1.90 | 2.02 | 1.18 | 2.63 | 1.09 | 0.94 | 10.92 | |||||||||||||
1983 | 0.79 | 0.43 | 0.66 | 0.55 | 0.35 | b | 0.91 | 0.98 | 0.73 | 0.94 | 1.78 | 1.22 | 0.50 | a | 9.84 | |||||||||||
1984 | 0.30 | 0.03 | 0.07 | 0.19 | 2.18 | 3.62 | 3.10 | 2.63 | 1.91 | 2.08 | 2.15 | 1.38 | 19.64 | |||||||||||||
1985 | 1.74 | 0.51 | 1.54 | 1.40 | 2.77 | 2.43 | 2.97 | 1.72 | 2.26 | 4.58 | 0.30 | 0.08 | 22.30 | |||||||||||||
1986 | 0.00 | 0.92 | 0.64 | b | 0.18 | 1.79 | 3.81 | 0.37 | 4.05 | 1.52 | 3.35 | 2.15 | 1.77 | 20.55 | ||||||||||||
1987 | 0.86 | 1.12 | 0.27 | 0.27 | 1.85 | 1.69 | 0.14 | 3.46 | 1.39 | 0.22 | 0.40 | 0.72 | 12.39 | |||||||||||||
1988 | 0.16 | 0.07 | 0.08 | 1.01 | 1.65 | 1.95 | 5.70 | 2.00 | 2.88 | 0.18 | 0.02 | 0.24 | 15.94 | |||||||||||||
1989 | 0.32 | 0.59 | 0.14 | 0.26 | 0.38 | 0.95 | 0.72 | 4.14 | 0.60 | 0.24 | 0.00 | 0.36 | 8.70 | |||||||||||||
1990 | 0.53 | 0.94 | 1.18 | 1.41 | 1.16 | 0.05 | 2.42 | 5.29 | 1.42 | 0.64 | 0.43 | 0.29 | 15.76 | |||||||||||||
1991 | 0.36 | 0.00 | 0.00 | 0.00 | 2.01 | 0.27 | 6.12 | 4.65 | 4.16 | 0.21 | 1.42 | 1.86 | 21.06 | |||||||||||||
1992 | 0.31 | 0.27 | 0.29 | 0.75 | 2.98 | 2.68 | 0.35 | 3.32 | 0.50 | 0.08 | 0.07 | 0.79 | 12.39 | |||||||||||||
1993 | 0.81 | 0.35 | 1.05 | 0.01 | 1.12 | 1.98 | 2.98 | 2.33 | 1.19 | 0.54 | 0.56 | 0.00 | 12.92 | |||||||||||||
1994 | 0.01 | 0.00 | 0.98 | 0.41 | 3.30 | 0.77 | 1.84 | 3.42 | 1.47 | 1.21 | 0.50 | 0.60 | 14.51 | |||||||||||||
1995 | 0.16 | 0.03 | 0.59 | 0.51 | 1.86 | 2.03 | 0.80 | 1.42 | 1.46 | 0.02 | 0.08 | 0.46 | 9.42 | |||||||||||||
1996 | 0.12 | 0.24 | 0.00 | 0.00 | 0.00 | 3.27 | 2.36 | 3.75 | 1.51 | 1.22 | 0.07 | 0.00 | 12.54 | |||||||||||||
1997 | 0.41 | a | 1.19 | 0.08 | 5.10 | 1.12 | 3.10 | 3.54 | 1.90 | 2.07 | 0.48 | 0.90 | 2.71 | 22.60 | ||||||||||||
1998 | 0.01 | 0.85 | 0.89 | 0.86 | 0.00 | 0.28 | 2.41 | 4.95 | 0.76 | 4.35 | 0.30 | 0.38 | 16.04 | |||||||||||||
1999 | 0.40 | 0.00 | 2.05 | 3.30 | 4.94 | 1.08 | 4.74 | 2.91 | 1.76 | 0.34 | 0.00 | 0.55 | 22.07 | |||||||||||||
2000 | 0.00 | 0.00 | 1.37 | 0.68 | 0.10 | 3.07 | 1.42 | 0.21 | 0.03 | 5.32 | 0.24 | 0.67 | 13.11 | |||||||||||||
2001 | 0.73 | 0.65 | 1.27 | 0.03 | 0.65 | 0.97 | 1.28 | 0.49 | 0.77 | 0.34 | 1.08 | 0.18 | 8.44 | |||||||||||||
2002 | 0.62 | 0.00 | 0.64 | 0.22 | 0.05 | 0.66 | 3.47 | 0.34 | 3.74 | 1.52 | 0.08 | 1.18 | 12.52 | |||||||||||||
2003 | 0.00 | 0.33 | 0.33 | 0.26 | 0.09 | 2.62 | 0.07 | 0.35 | 1.00 | 2.11 | 0.50 | 0.02 | 7.68 | |||||||||||||
2004 | 0.00 | a | 2.19 | 0.48 | 4.31 | 0.00 | 2.36 | 3.52 | 2.49 | 1.42 | 2.61 | 1.24 | 0.18 | 20.80 | ||||||||||||
2005 | 1.06 | 1.38 | 0.60 | 1.64 | 2.87 | ----- | z | 0.68 | 2.38 | 1.57 | 0.54 | 0.00 | 0.00 | 12.72 | a | |||||||||||
2006 | 0.00 | 0.00 | 0.07 | 0.37 | 0.33 | 1.21 | 2.87 | 4.38 | 1.52 | 1.49 | 0.02 | 0.83 | 13.09 | |||||||||||||
2007 | 0.67 | 0.28 | 1.34 | 0.61 | 2.28 | 1.53 | 1.25 | 1.31 | 1.61 | 0.29 | 0.10 | 0.45 | 11.72 | |||||||||||||
2008 | 0.00 | 0.55 | 0.21 | 0.10 | 1.67 | 0.44 | 3.56 | 3.00 | 0.97 | 1.43 | 0.05 | 0.05 | 12.03 | |||||||||||||
2009 | 0.00 | 0.00 | 0.70 | 0.47 | 0.59 | 2.80 | 1.82 | 1.62 | 3.08 | 0.95 | 0.50 | 1.44 | 13.97 | |||||||||||||
2010 | 0.60 | 0.92 | 1.44 | 0.39 | 0.94 | 2.03 | 4.08 | 2.29 | 1.48 | 1.47 | 0.00 | 0.20 | 15.84 | |||||||||||||
2011 | 0.00 | 0.50 | 0.12 | 0.00 | 0.00 | 0.00 | 0.31 | 0.84 | 0.72 | 1.16 | 0.00 | 2.48 | 6.13 | |||||||||||||
2012 | 0.00 | 0.24 | 0.19 | 0.00 | 0.21 | 0.16 | 0.41 | 2.97 | 0.29 | 0.24 | ----- | z | 0.41 | 5.12 | a | |||||||||||
2013 | 0.23 | ----- | z | ----- | z | ----- | z | 0.05 | ----- | z | 3.70 | 0.90 | 8.83 | 0.28 | 0.27 | 0.08 | 14.34 | d | ||||||||
2014 | 0.00 | 0.11 | 0.20 | 0.08 | 1.93 | 0.85 | 5.15 | 1.72 | 4.13 | 0.49 | 0.59 | 0.26 | 15.51 | |||||||||||||
2015 | 1.51 | 0.67 | 0.59 | 0.18 | 2.95 | 4.39 | 6.05 | 1.76 | 1.16 | 4.83 | 0.59 | 1.39 | 26.07 | |||||||||||||
2016 | 0.45 | 0.10 | 0.00 | 0.69 | 0.85 | 1.54 | 1.15 | 1.15 | 1.60 | 0.14 | 4.44 | 0.35 | 12.46 | |||||||||||||
2017 | 0.98 | 0.07 | 0.88 | 1.23 | 0.53 | 1.03 | 1.71 | 2.68 | 3.52 | 6.54 | 0.00 | 0.00 | 19.17 | |||||||||||||
2018 | 0.11 | 0.11 | 0.03 | 0.02 | 0.90 | 0.95 | 2.74 | 3.90 | 3.14 | 3.20 | 0.25 | 0.57 | 15.92 | |||||||||||||
2019 | 0.09 | 0.01 | 0.85 | 1.68 | 0.62 | 1.14 | 1.86 | 1.06 | 1.20 | 1.11 | 0.74 | 0.28 | 10.64 | |||||||||||||
2020 | 0.70 | 0.29 | 1.08 | 0.38 | 0.08 | 0.29 | 2.20 | 0.64 | 0.35 | 0.62 | 0.10 | 0.01 | 6.74 | |||||||||||||
2021 | 0.12 | 0.02 | 0.18 | 0.30 | 1.27 | 2.73 | 4.98 | 1.35 | 0.63 | 0.96 | 0.00 | 0.00 | 12.54 | |||||||||||||
2022 | 0.03 | 0.08 | 0.24 | 0.00 | 0.30 | 1.93 | 0.92 | 2.39 | 0.25 | 2.42 | 0.21 | 0.33 | 9.10 | |||||||||||||
2023 | 0.14 | 0.16 | 0.12 | 0.07 | 1.76 | 2.09 | 1.12 | 0.63 | 2.43 | 0.94 | 0.15 | 1.35 | 10.96 | |||||||||||||
2024 | 0.83 | 0.27 | 0.26 | 0.06 | k | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.36 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.34 | 0.34 | 0.50 | 0.65 | 1.24 | 1.46 | 2.51 | 2.23 | 1.79 | 1.35 | 0.46 | 0.50 | 13.32 | |||||||||||||
S.D. | 0.38 | 0.38 | 0.56 | 0.93 | 1.24 | 1.21 | 1.82 | 1.38 | 1.81 | 1.45 | 0.65 | 0.56 | 5.52 | |||||||||||||
SKEW | 1.48 | 1.98 | 1.83 | 2.79 | 1.37 | 0.76 | 1.28 | 0.58 | 2.95 | 1.68 | 3.29 | 1.78 | 1.87 | |||||||||||||
MAX | 1.74 | 2.19 | 2.96 | 5.10 | 5.48 | 4.81 | 9.93 | 5.66 | 12.05 | 6.54 | 4.44 | 2.71 | 40.97 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.12 | 0.00 | 0.00 | 0.00 | 0.00 | 3.95 | |||||||||||||
YRS | 86 | 84 | 85 | 84 | 84 | 83 | 85 | 85 | 85 | 85 | 84 | 84 | 79 |