YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1935 | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 0.00 | 0.00 | 0.48 | 0.02 | 0.00 | 0.38 | 0.49 | 1.37 | d | ||||||||
1936 | 0.05 | 0.60 | 0.66 | 0.00 | 0.00 | 0.00 | 1.36 | 0.16 | 0.00 | 1.61 | 0.78 | 1.31 | 6.53 | |||||||||||||
1937 | 0.17 | 0.24 | 0.21 | 0.00 | 0.00 | 0.04 | 0.33 | 0.30 | 0.00 | 0.00 | 0.00 | 0.29 | 1.58 | |||||||||||||
1938 | 0.04 | 0.53 | 1.25 | 0.00 | 0.00 | 0.00 | 0.98 | 0.00 | 0.46 | 0.10 | 0.00 | 1.33 | 4.69 | |||||||||||||
1939 | 1.69 | 0.18 | 0.20 | 0.49 | 0.00 | 0.00 | 0.00 | 0.57 | 2.38 | 0.00 | 1.25 | 0.00 | 6.76 | |||||||||||||
1940 | 1.08 | 1.38 | 0.14 | 0.00 | 0.14 | 0.00 | 0.00 | 0.00 | 0.33 | 0.00 | 0.00 | 2.05 | 5.12 | |||||||||||||
1941 | 1.27 | 0.20 | 1.42 | 0.59 | 0.00 | 0.00 | 0.01 | 1.84 | 0.00 | 0.84 | 1.25 | 0.84 | 8.26 | |||||||||||||
1942 | 0.20 | 0.07 | 0.16 | 0.05 | 0.00 | 0.00 | 0.00 | 0.25 | 0.00 | 0.18 | 0.00 | 0.04 | 0.95 | |||||||||||||
1943 | 2.19 | 0.23 | 0.66 | 0.40 | 0.00 | 0.00 | 0.05 | 0.84 | 1.05 | 3.90 | 0.00 | 1.88 | 11.20 | |||||||||||||
1944 | 0.32 | 1.39 | 0.43 | 0.06 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 2.06 | 0.05 | 4.36 | |||||||||||||
1945 | 0.26 | 0.34 | 0.37 | 0.00 | 0.00 | 0.00 | 0.00 | 3.83 | 0.08 | 0.44 | 0.00 | 0.44 | 5.76 | |||||||||||||
1946 | 0.00 | 0.00 | 0.02 | 0.00 | 0.00 | 0.00 | 2.55 | 0.61 | 0.06 | 0.02 | 0.24 | 0.15 | 3.65 | |||||||||||||
1947 | 0.00 | 0.00 | 0.13 | 0.06 | 0.00 | 0.00 | 0.00 | 0.25 | 0.01 | 0.52 | 0.10 | 0.87 | 1.94 | |||||||||||||
1948 | 0.00 | 0.05 | 0.00 | ----- | z | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 1.35 | 0.00 | 0.03 | 1.44 | a | |||||||||||
1949 | 2.01 | 0.13 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | b | 0.00 | 0.71 | 0.00 | 0.18 | 0.21 | 3.44 | ||||||||||||
1950 | 0.03 | 0.23 | 0.13 | 0.00 | 0.00 | 0.00 | 0.17 | 0.33 | 0.49 | 0.02 | 0.00 | 0.00 | 1.40 | |||||||||||||
1951 | 0.42 | g | 0.00 | 0.00 | 0.33 | 0.31 | 0.00 | 0.89 | 0.37 | 0.45 | 0.47 | g | 0.36 | 0.56 | 3.27 | b | ||||||||||
1952 | 0.88 | 0.01 | 0.07 | 0.20 | 0.00 | 0.10 | 1.50 | 0.00 | 1.24 | 0.00 | 0.37 | 1.27 | a | 5.64 | ||||||||||||
1953 | 0.00 | 0.20 | 0.15 | 0.00 | 0.00 | 0.00 | 0.22 | 0.64 | 0.00 | 0.00 | 0.10 | 0.00 | 1.31 | |||||||||||||
1954 | 0.69 | 0.00 | 0.52 | 0.00 | 0.00 | 0.05 | 0.58 | 0.00 | i | 1.43 | 0.01 | 0.11 | 0.00 | 3.39 | a | |||||||||||
1955 | 1.53 | 0.00 | 0.00 | 0.02 | 0.00 | 0.00 | 2.34 | 2.24 | a | 0.00 | 0.00 | 0.00 | 0.06 | 6.19 | ||||||||||||
1956 | 0.13 | 0.03 | 0.00 | 0.04 | 0.03 | 0.00 | 0.01 | 0.00 | 0.00 | 0.03 | 0.00 | 0.00 | h | 0.27 | a | |||||||||||
1957 | 1.04 | 0.02 | 0.15 | 0.03 | 0.03 | 0.08 | 0.84 | 0.00 | 0.00 | 1.12 | 0.00 | 0.11 | 3.42 | |||||||||||||
1958 | 0.00 | 0.90 | 0.44 | 0.57 | 0.16 | 0.05 | 0.21 | 0.94 | 0.18 | 0.66 | 0.19 | 0.00 | 4.30 | |||||||||||||
1959 | 0.18 | 0.03 | 0.00 | 0.00 | 0.00 | 0.13 | 0.70 | 0.21 | 0.03 | 0.36 | 0.40 | 1.43 | 3.47 | |||||||||||||
1960 | 0.09 | 0.20 | 0.01 | 0.00 | 0.00 | 0.00 | 1.13 | 0.00 | 0.86 | 0.00 | 0.83 | 0.12 | 3.24 | |||||||||||||
1961 | 0.11 | 0.00 | 0.30 | 0.00 | 0.00 | 0.00 | 0.05 | 2.97 | 0.00 | 0.00 | 0.25 | 0.38 | 4.06 | |||||||||||||
1962 | 0.02 | 0.23 | 0.27 | 0.00 | 0.07 | 0.00 | 0.00 | 0.00 | 0.00 | 0.77 | 0.00 | 0.48 | 1.84 | |||||||||||||
1963 | 0.51 | 0.10 | 0.00 | 0.25 | 0.00 | 0.03 | 0.03 | 0.55 | 1.74 | 2.74 | 0.59 | 0.01 | 6.55 | |||||||||||||
1964 | 0.01 | 0.00 | 0.07 | 0.00 | 0.00 | 0.00 | 0.24 | 0.25 | 0.00 | 0.00 | 0.83 | 0.00 | 1.40 | |||||||||||||
1965 | 0.01 | 0.03 | 0.29 | 0.80 | 0.00 | 0.08 | 0.23 | 0.89 | 0.00 | 0.00 | 1.09 | 2.03 | 5.45 | |||||||||||||
1966 | 0.21 | 0.53 | 0.54 | 0.00 | 0.00 | 0.00 | 0.00 | ----- | z | 0.06 | 0.19 | 0.12 | 0.38 | 2.03 | a | |||||||||||
1967 | 0.08 | 0.00 | 0.00 | 0.07 | 0.00 | 0.00 | 1.68 | 2.18 | 1.21 | 0.00 | 0.21 | 0.83 | 6.26 | |||||||||||||
1968 | 0.00 | ----- | z | 0.80 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | ----- | z | 0.00 | 0.23 | 1.03 | b | ||||||||||
1969 | 0.57 | 0.00 | 0.08 | 0.00 | 0.86 | 0.03 | 1.03 | 0.19 | 0.22 | 0.00 | 0.00 | 0.00 | 2.98 | |||||||||||||
1970 | 0.00 | 0.45 | 0.31 | 0.00 | 0.00 | 0.00 | 1.18 | 1.24 | 0.00 | 0.00 | 0.11 | 0.33 | 3.62 | |||||||||||||
1971 | 0.00 | 0.01 | 0.00 | 0.20 | 0.19 | 0.00 | 0.95 | 2.46 | 0.00 | 0.02 | 0.02 | 0.17 | 4.02 | |||||||||||||
1972 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.24 | 0.50 | 0.00 | 0.74 | |||||||||||||
1973 | 0.04 | 0.14 | 0.61 | 0.00 | 0.00 | 0.00 | 0.05 | 0.56 | 0.00 | 0.00 | 0.15 | 0.00 | 1.55 | |||||||||||||
1974 | 1.03 | 0.00 | 0.48 | 0.00 | 0.00 | 0.00 | 0.63 | 0.03 | 0.00 | 0.44 | 0.13 | 0.10 | 2.84 | |||||||||||||
1975 | 0.00 | 0.02 | 0.20 | 0.43 | 0.00 | 0.00 | 0.25 | 0.00 | 2.04 | 0.02 | 0.02 | 0.02 | 3.00 | |||||||||||||
1976 | 0.00 | 1.57 | 0.09 | 0.28 | 0.26 | 0.00 | 0.66 | 0.00 | 3.41 | 0.28 | 0.09 | 0.01 | 6.65 | |||||||||||||
1977 | 0.78 | 0.00 | 0.14 | 0.05 | 0.16 | 0.00 | 0.56 | 3.68 | 0.05 | 0.00 | 0.00 | 0.58 | 6.00 | |||||||||||||
1978 | 2.07 | 0.91 | 0.89 | 0.26 | 0.04 | 0.00 | 0.78 | 0.02 | 0.06 | 0.31 | 1.37 | 0.28 | 6.99 | |||||||||||||
1979 | 1.12 | 0.65 | 0.78 | 0.00 | 0.05 | 0.00 | 2.84 | 0.73 | 0.00 | 0.00 | 0.00 | 0.25 | 6.42 | |||||||||||||
1980 | 0.83 | 2.45 | 1.08 | 0.17 | 0.37 | 0.00 | 0.61 | 0.00 | 1.65 | 0.03 | 0.00 | 0.00 | 7.19 | |||||||||||||
1981 | 0.84 | 0.12 | 1.12 | 0.00 | 0.46 | 0.00 | 0.23 | 0.00 | 0.10 | 0.00 | 0.05 | 0.00 | 2.92 | |||||||||||||
1982 | 0.82 | 0.00 | 0.34 | 0.00 | 0.58 | 0.00 | 0.85 | 0.54 | 0.53 | 0.00 | 0.51 | 2.46 | 6.63 | |||||||||||||
1983 | 0.50 | 0.88 | 2.40 | 0.06 | 0.00 | 0.00 | 0.00 | 4.93 | 1.22 | 1.23 | 0.20 | 0.90 | 12.32 | |||||||||||||
1984 | 0.00 | 0.00 | 0.00 | 0.00 | 0.07 | 0.00 | 3.12 | 1.87 | 0.00 | 0.00 | 0.62 | 1.08 | 6.76 | |||||||||||||
1985 | 0.33 | 0.08 | 0.00 | 0.00 | 0.00 | 0.00 | 2.33 | 0.02 | 0.91 | 0.00 | 0.42 | 0.36 | 4.45 | |||||||||||||
1986 | 0.29 | 0.65 | b | 0.21 | 0.01 | 0.00 | 0.00 | 0.22 | 0.73 | 0.00 | a | 0.39 | 0.15 | 0.58 | a | 3.23 | ||||||||||
1987 | 0.03 | 0.23 | 0.16 | 0.00 | 0.21 | 0.00 | 0.00 | 0.36 | 0.72 | 0.92 | 1.07 | 0.99 | 4.69 | |||||||||||||
1988 | 0.47 | 0.67 | 0.16 | 0.46 | 0.00 | 0.00 | d | 0.00 | 0.00 | 0.00 | 0.00 | a | 0.00 | 0.04 | a | 1.80 | ||||||||||
1989 | 0.81 | 0.00 | 0.70 | 0.00 | 0.03 | 0.00 | 0.00 | 0.27 | 0.01 | 0.00 | 0.00 | 0.47 | 2.29 | |||||||||||||
1990 | 0.02 | 0.06 | 0.05 | 0.09 | 0.09 | 0.10 | 1.34 | 0.07 | 0.09 | 0.13 | a | 0.00 | 0.00 | 2.04 | ||||||||||||
1991 | 0.55 | 0.41 | 1.23 | 0.00 | 0.00 | a | 0.00 | 0.43 | 0.24 | 0.76 | 0.07 | 0.00 | 1.06 | 4.75 | ||||||||||||
1992 | 0.23 | 2.23 | 2.03 | 0.17 | 0.10 | 0.00 | 0.07 | 1.23 | 0.00 | 0.30 | 0.00 | ----- | z | 6.36 | a | |||||||||||
1993 | 2.63 | d | 0.95 | 0.14 | 0.00 | 0.02 | 0.05 | 0.00 | 0.02 | 0.00 | 0.04 | 0.25 | 0.24 | 4.34 | ||||||||||||
1994 | 0.15 | 0.47 | 0.83 | 0.00 | 0.31 | 0.00 | 0.00 | 1.06 | 0.20 | 0.00 | 0.16 | 0.88 | a | 4.06 | ||||||||||||
1995 | 2.13 | 0.86 | 0.29 | 0.18 | 0.00 | 0.00 | 0.07 | 0.03 | 0.13 | 0.00 | 0.00 | 0.00 | 3.69 | |||||||||||||
1996 | 0.05 | f | 0.30 | 0.12 | 0.00 | 0.02 | 0.00 | 0.49 | 0.37 | 0.00 | 0.03 | 0.25 | 0.06 | 1.64 | a | |||||||||||
1997 | 0.51 | 0.01 | ----- | z | 0.38 | 0.64 | 0.01 | 1.05 | 1.34 | 3.96 | 0.00 | 0.17 | 0.33 | 8.40 | a | |||||||||||
1998 | 0.25 | 1.25 | 0.82 | 0.01 | 0.03 | 0.00 | 0.65 | 0.00 | 0.28 | 0.04 | 0.03 | 0.04 | 3.40 | |||||||||||||
1999 | ----- | z | 0.40 | 0.00 | 1.37 | 0.02 | 0.02 | 0.93 | 0.03 | 0.39 | 0.00 | 0.00 | 0.00 | 3.16 | a | |||||||||||
2000 | 0.02 | 0.33 | 0.16 | 0.00 | 0.00 | 0.00 | 0.00 | 2.28 | 0.03 | 0.47 | 0.00 | 0.00 | 3.29 | |||||||||||||
2001 | 0.86 | 1.33 | 0.29 | 0.00 | 0.00 | 0.00 | 0.60 | 0.54 | 1.05 | 0.00 | 0.01 | 0.46 | 5.14 | |||||||||||||
2002 | 0.04 | 0.00 | 0.12 | 0.14 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | a | 0.00 | 0.56 | 0.02 | 0.90 | ||||||||||||
2003 | 0.16 | 0.95 | 0.24 | 0.14 | 0.00 | 0.00 | 0.09 | 3.51 | 0.50 | 0.00 | 1.02 | 0.29 | 6.90 | |||||||||||||
2004 | 0.14 | 0.92 | 0.77 | 0.42 | 0.00 | 0.00 | 0.00 | 1.02 | 0.07 | 0.38 | 1.32 | a | 2.13 | 7.17 | ||||||||||||
2005 | 1.14 | 3.19 | 0.06 | a | 0.00 | 0.00 | 0.00 | 2.54 | c | 0.15 | c | 0.18 | 0.47 | 0.00 | 0.00 | 7.73 | ||||||||||
2006 | 0.01 | 0.02 | b | 0.04 | c | 0.13 | 0.00 | 0.00 | 0.30 | 0.01 | 0.03 | 0.07 | 0.00 | 0.04 | 0.65 | |||||||||||
2007 | 0.00 | 0.01 | 0.09 | 0.25 | 0.00 | 0.00 | 0.02 | 1.06 | 0.52 | 0.00 | 0.28 | 1.30 | 3.53 | |||||||||||||
2008 | 1.02 | 0.13 | 0.00 | 0.00 | 0.02 | 0.00 | 0.72 | 0.96 | 0.14 | 0.00 | 0.00 | 1.30 | 4.29 | |||||||||||||
2009 | 0.00 | 0.51 | 0.00 | o | 0.02 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 0.05 | 0.71 | 1.30 | a | |||||||||||
2010 | 1.01 | 0.11 | 0.80 | 0.00 | 0.00 | 0.00 | 0.05 | 0.00 | 0.00 | 0.75 | 0.00 | 0.77 | 3.49 | |||||||||||||
2011 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.20 | 1.62 | 0.04 | 0.00 | 0.04 | 1.83 | 3.73 | |||||||||||||
2012 | 0.00 | 0.00 | 0.04 | 0.00 | 0.00 | 0.00 | 0.40 | 0.80 | ----- | z | ----- | z | 0.00 | 0.03 | 1.27 | b | ||||||||||
2013 | 0.07 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.24 | 0.61 | 0.57 | 0.00 | 0.74 | 0.04 | 2.27 | |||||||||||||
2014 | 0.00 | 0.23 | 0.03 | 0.06 | 0.00 | 0.00 | 2.25 | 0.18 | 0.03 | 0.00 | 0.00 | 0.24 | 3.02 | |||||||||||||
2015 | 0.76 | 0.07 | 0.14 | 0.13 | 0.03 | 0.00 | 0.82 | 0.06 | 0.06 | 0.26 | 0.05 | 0.00 | 2.38 | |||||||||||||
2016 | 0.62 | 0.01 | 0.03 | 0.31 | 0.05 | 0.00 | 0.00 | 0.00 | 0.39 | 0.10 | 0.01 | 1.26 | 2.78 | |||||||||||||
2017 | 1.41 | 0.44 | 0.00 | 0.00 | 0.01 | 0.00 | 0.03 | 0.79 | 0.37 | 0.00 | 0.00 | 0.00 | 3.05 | |||||||||||||
2018 | 0.75 | 0.00 | 0.09 | 0.00 | 0.03 | 0.00 | 1.28 | 0.06 | 0.00 | 1.50 | 0.00 | 0.29 | 4.00 | |||||||||||||
2019 | 0.53 | 1.61 | 0.36 | 0.00 | 0.09 | 0.00 | 1.44 | 0.00 | 0.53 | 0.00 | 0.35 | 2.13 | 7.04 | |||||||||||||
2020 | 0.04 | 0.03 | 1.38 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.00 | 0.00 | 0.02 | 0.20 | 1.70 | |||||||||||||
2021 | 0.64 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.08 | 0.67 | 0.10 | 0.06 | 0.00 | 0.44 | 2.99 | |||||||||||||
2022 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.28 | 0.90 | 0.10 | 0.44 | 0.00 | 0.09 | 1.81 | |||||||||||||
2023 | 0.00 | 0.02 | 0.76 | 0.00 | 0.27 | 0.06 | 0.00 | 1.96 | 0.00 | 0.00 | 0.09 | 0.31 | 3.47 | |||||||||||||
2024 | 0.61 | 0.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.01 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.48 | 0.39 | 0.35 | 0.11 | 0.06 | 0.01 | 0.56 | 0.69 | 0.39 | 0.28 | 0.25 | 0.49 | 4.20 | |||||||||||||
S.D. | 0.61 | 0.59 | 0.46 | 0.22 | 0.15 | 0.03 | 0.74 | 1.00 | 0.71 | 0.60 | 0.40 | 0.62 | 2.29 | |||||||||||||
SKEW | 1.52 | 2.38 | 2.07 | 3.16 | 3.21 | 2.97 | 1.65 | 2.11 | 2.89 | 3.73 | 2.12 | 1.45 | 0.95 | |||||||||||||
MAX | 2.63 | 3.19 | 2.40 | 1.37 | 0.86 | 0.13 | 3.12 | 4.93 | 3.96 | 3.90 | 2.06 | 2.46 | 12.32 | |||||||||||||
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 | 0.65 | |||||||||||||
YRS | 86 | 88 | 86 | 87 | 89 | 89 | 89 | 87 | 88 | 86 | 89 | 87 | 76 |