| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1932 | ----- | z | ----- | z | 0.00 | 0.00 | 0.00 | 0.11 | 0.00 | 0.00 | 0.00 | 1.68 | 0.00 | 0.65 | 2.44 | b | ||||||||||
| 1933 | 0.50 | 0.02 | 0.00 | 0.72 | 0.00 | 0.00 | 0.33 | 0.04 | 0.02 | 0.00 | 0.06 | 0.06 | 1.75 | |||||||||||||
| 1934 | 0.00 | 0.04 | 0.12 | 0.00 | 0.00 | 0.00 | 0.02 | 0.77 | 0.00 | 0.00 | 0.00 | 0.34 | 1.29 | |||||||||||||
| 1935 | 0.54 | 2.06 | 0.05 | 0.00 | 0.00 | 0.00 | 0.20 | 0.52 | 0.03 | 0.00 | 0.00 | 0.60 | 4.00 | |||||||||||||
| 1936 | 0.20 | 0.43 | 0.00 | 0.00 | 0.00 | 0.00 | 0.43 | 0.11 | 0.00 | 0.09 | 0.16 | 0.27 | 1.69 | |||||||||||||
| 1937 | 0.03 | 0.14 | 0.74 | 0.00 | 0.02 | 0.00 | 0.22 | 0.00 | 0.23 | 0.00 | 0.00 | 0.03 | 1.41 | |||||||||||||
| 1938 | 0.00 | 0.96 | 0.43 | 0.00 | 0.00 | 0.00 | 0.07 | 0.15 | 0.00 | 0.00 | 0.00 | 1.22 | 2.83 | |||||||||||||
| 1939 | 0.56 | 0.57 | 0.06 | 0.13 | 0.00 | 0.00 | 0.00 | 0.03 | 5.13 | 0.00 | 0.32 | 0.00 | 6.80 | |||||||||||||
| 1940 | 0.04 | 0.77 | 0.01 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 1.59 | 0.08 | 0.05 | 2.32 | 4.87 | |||||||||||||
| 1941 | 0.93 | 0.33 | 1.73 | 0.16 | 0.00 | 0.00 | 0.04 | 0.77 | 0.06 | 1.33 | 0.10 | 0.74 | 6.19 | |||||||||||||
| 1942 | 0.04 | 0.72 | 0.50 | 0.31 | 0.00 | 0.00 | 0.00 | 0.07 | 0.00 | 0.03 | 0.00 | 0.00 | 1.67 | |||||||||||||
| 1943 | 0.41 | 0.14 | 0.16 | 0.00 | 0.00 | 0.00 | 0.00 | 0.60 | 0.01 | 0.00 | 0.00 | 2.56 | 3.88 | |||||||||||||
| 1944 | 0.00 | 1.01 | 0.10 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.09 | 0.69 | 0.89 | 2.78 | |||||||||||||
| 1945 | 0.63 | 0.05 | 0.18 | 0.07 | 0.00 | 0.00 | 0.00 | 0.77 | 0.00 | 0.00 | 0.00 | 0.61 | 2.31 | |||||||||||||
| 1946 | 0.00 | 0.00 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 1.84 | 0.08 | 0.26 | 0.11 | 0.46 | 2.78 | |||||||||||||
| 1947 | 0.00 | 0.00 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.12 | 0.00 | 0.00 | 0.02 | 0.41 | 0.59 | |||||||||||||
| 1948 | 0.00 | 0.00 | 0.07 | 0.00 | 0.00 | 0.25 | 0.00 | 0.00 | 0.00 | 1.02 | 0.00 | 0.37 | 1.71 | |||||||||||||
| 1949 | 1.78 | 0.00 | 0.09 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.26 | 0.01 | 0.20 | 2.34 | |||||||||||||
| 1950 | 0.00 | 0.21 | 0.00 | 0.00 | 0.00 | 0.00 | 0.67 | 0.00 | 0.00 | 0.00 | 0.00 | 0.07 | 0.95 | |||||||||||||
| 1951 | 0.29 | 0.01 | 0.00 | 0.14 | 0.00 | 0.00 | 0.10 | 2.49 | 0.00 | 0.00 | 0.35 | 0.36 | 3.74 | |||||||||||||
| 1952 | 0.63 | 0.20 | 0.47 | 0.46 | 0.00 | 0.00 | 0.12 | 0.23 | 0.00 | 0.00 | 0.28 | 0.14 | 2.53 | |||||||||||||
| 1953 | 0.00 | 0.03 | 0.31 | 0.00 | 0.00 | 0.00 | 0.07 | 0.00 | 0.00 | 0.00 | 0.04 | 0.00 | 0.45 | |||||||||||||
| 1954 | 1.72 | 0.00 | 0.24 | 0.00 | 0.00 | 0.00 | 0.06 | a | 0.00 | 0.00 | 0.00 | 0.02 | 0.00 | 2.04 | ||||||||||||
| 1955 | 1.71 | 0.00 | 0.06 | 0.00 | 0.00 | 0.00 | 0.59 | 1.05 | 0.00 | 0.00 | 0.00 | 0.09 | 3.50 | |||||||||||||
| 1956 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | 0.04 | 0.00 | 0.00 | 0.00 | 0.25 | |||||||||||||
| 1957 | 0.70 | 0.09 | 0.02 | 0.00 | 0.00 | 0.00 | 0.00 | 0.74 | 0.00 | 2.09 | 0.00 | 0.05 | 3.69 | |||||||||||||
| 1958 | 0.07 | 1.25 | 0.44 | 0.60 | 0.12 | 0.00 | 0.12 | 0.00 | 0.00 | 0.00 | 0.30 | 0.00 | 2.90 | |||||||||||||
| 1959 | 0.16 | 0.23 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.23 | 0.10 | 0.49 | 0.00 | 0.69 | 1.90 | |||||||||||||
| 1960 | 0.32 | 0.14 | 0.02 | 0.00 | 0.00 | 0.00 | 0.06 | 0.22 | 0.01 | 0.00 | 0.03 | 0.07 | 0.87 | |||||||||||||
| 1961 | 0.15 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.75 | 0.00 | 0.00 | 0.05 | 0.81 | 1.78 | |||||||||||||
| 1962 | 0.92 | 0.15 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.88 | 1.99 | |||||||||||||
| 1963 | 0.00 | 0.07 | 0.15 | 0.00 | 0.00 | 0.00 | 0.00 | 0.13 | 1.02 | 0.00 | b | 0.42 | a | 0.00 | 1.79 | |||||||||||
| 1964 | 0.00 | 0.21 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.22 | 0.24 | 0.02 | 0.69 | |||||||||||||
| 1965 | 0.00 | 0.16 | 0.20 | 0.61 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.24 | 1.88 | 3.09 | |||||||||||||
| 1966 | 0.29 | 0.21 | 0.12 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.13 | 0.82 | 0.06 | 0.00 | 1.63 | |||||||||||||
| 1967 | 0.26 | 0.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.47 | 0.00 | 1.69 | 0.77 | 4.39 | |||||||||||||
| 1968 | 0.00 | 0.00 | 0.50 | 0.00 | 0.00 | 0.00 | 1.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.55 | |||||||||||||
| 1969 | 0.79 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.94 | 0.00 | 0.00 | 1.52 | 0.03 | 3.33 | |||||||||||||
| 1970 | 0.00 | 0.87 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.12 | 0.00 | 0.00 | 0.02 | 0.05 | 1.06 | |||||||||||||
| 1971 | 0.03 | 0.03 | 0.00 | 0.08 | 0.00 | 0.00 | 0.00 | 0.04 | 0.24 | 0.02 | 0.00 | 0.00 | 0.44 | |||||||||||||
| 1972 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.00 | 0.00 | 0.00 | 1.86 | 0.36 | 0.00 | 2.32 | |||||||||||||
| 1973 | 0.00 | 0.29 | ----- | z | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.29 | a | |||||||||||
| 1974 | 0.98 | 0.00 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | ----- | z | 0.00 | 0.37 | 1.42 | a | |||||||||||
| 1975 | 0.00 | 0.00 | 0.20 | 0.40 | 0.00 | 0.00 | 0.07 | 0.00 | 0.27 | 0.00 | 0.00 | 0.03 | 0.97 | |||||||||||||
| 1976 | 0.00 | 0.67 | 0.00 | 0.33 | 0.21 | 0.00 | 0.04 | 0.00 | 2.40 | 0.02 | 0.51 | 0.18 | 4.36 | |||||||||||||
| 1977 | 0.11 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 2.98 | 0.00 | 0.37 | 0.00 | 1.08 | 4.54 | |||||||||||||
| 1978 | 1.11 | 0.35 | 0.30 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.04 | 1.20 | 0.83 | 4.88 | |||||||||||||
| 1979 | 1.20 | 0.12 | 0.38 | 0.00 | 0.06 | 0.00 | 0.43 | 0.88 | 0.00 | 0.00 | 0.00 | 0.00 | 3.07 | |||||||||||||
| 1980 | 1.01 | 1.57 | 1.31 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 4.06 | |||||||||||||
| 1981 | 1.26 | 0.40 | 0.57 | 0.00 | 0.21 | 0.00 | 0.00 | 1.15 | 0.00 | 0.00 | 0.27 | 0.00 | 3.86 | |||||||||||||
| 1982 | 0.05 | 0.09 | 0.63 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.28 | 0.00 | 0.15 | 2.72 | 4.92 | |||||||||||||
| 1983 | 0.21 | 1.64 | 1.33 | 0.04 | 0.00 | 0.00 | 0.00 | 1.71 | b | 0.09 | 0.00 | 0.00 | 0.48 | 5.50 | ||||||||||||
| 1984 | 0.21 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.34 | 0.09 | 0.00 | 0.00 | 0.36 | 1.33 | 2.33 | |||||||||||||
| 1985 | 0.06 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.30 | 1.86 | 0.63 | 0.79 | 0.84 | 4.72 | |||||||||||||
| 1986 | 0.14 | 0.45 | 0.11 | 0.01 | 0.00 | 0.00 | 0.26 | 0.16 | 0.07 | 2.41 | 0.17 | 0.04 | 3.82 | |||||||||||||
| 1987 | 0.05 | 0.22 | 0.00 | 0.00 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 1.53 | 0.04 | 0.37 | 2.24 | |||||||||||||
| 1988 | 1.30 | 0.30 | 0.00 | 0.11 | 0.00 | 0.00 | 0.00 | 0.72 | 0.00 | 0.00 | 0.00 | 0.00 | 2.43 | |||||||||||||
| 1989 | 0.72 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.17 | 0.00 | 0.03 | 0.00 | 0.00 | 0.92 | |||||||||||||
| 1990 | 0.18 | 0.00 | 0.00 | 0.02 | 0.00 | 0.08 | 0.25 | 0.91 | 0.53 | 0.00 | 0.00 | 0.00 | 1.97 | |||||||||||||
| 1991 | 0.45 | 0.71 | 0.50 | 0.00 | 0.00 | 0.00 | 0.00 | a | 0.02 | 0.55 | 0.00 | 0.35 | 1.28 | 3.86 | ||||||||||||
| 1992 | 0.49 | 2.16 | 1.96 | 0.05 | 0.19 | 0.00 | 0.00 | 0.28 | 0.00 | 1.88 | 0.00 | ----- | z | 7.01 | a | |||||||||||
| 1993 | 3.45 | t | 0.74 | 0.19 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.75 | 0.00 | 1.72 | a | |||||||||||
| 1994 | 0.13 | 0.50 | ----- | z | 0.00 | 0.14 | 0.00 | 0.00 | 0.00 | 0.15 | 0.00 | 0.20 | 0.71 | 1.83 | a | |||||||||||
| 1995 | 1.66 | y | 0.12 | 0.22 | 0.10 | 0.00 | 0.00 | 0.02 | 0.04 | 0.00 | 0.00 | 0.00 | 0.06 | 0.56 | a | |||||||||||
| 1996 | 0.00 | 0.15 | 0.00 | 0.00 | 0.00 | 0.00 | 0.09 | 0.02 | 0.00 | 0.00 | 0.00 | 0.00 | 0.26 | |||||||||||||
| 1997 | ----- | z | 0.05 | 0.00 | 0.01 | c | 0.00 | 0.02 | 0.00 | 0.06 | 2.44 | 0.00 | 0.00 | 0.82 | 3.40 | a | ||||||||||
| 1998 | 0.08 | 0.97 | 0.43 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.28 | 0.00 | 0.04 | 0.20 | 2.02 | |||||||||||||
| 1999 | 0.00 | 0.00 | 0.00 | 0.31 | 0.00 | 0.00 | ----- | z | 0.16 | 0.63 | 0.00 | 0.00 | 0.00 | 1.10 | a | |||||||||||
| 2000 | 0.00 | 0.06 | 0.09 | 0.00 | 0.09 | 0.00 | 0.00 | 0.01 | 0.00 | 0.54 | 0.00 | 0.00 | 0.79 | |||||||||||||
| 2001 | 0.24 | 0.55 | 0.56 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.02 | 0.00 | 0.00 | 0.00 | 1.39 | |||||||||||||
| 2002 | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.08 | 0.00 | 0.26 | 0.01 | 0.36 | |||||||||||||
| 2003 | 0.00 | 1.32 | 0.42 | 0.00 | 0.00 | 0.00 | 0.12 | 1.04 | 0.00 | 0.00 | 0.11 | 0.02 | 3.03 | |||||||||||||
| 2004 | 0.06 | 1.34 | 0.17 | 0.43 | 0.00 | 0.00 | 0.00 | 0.34 | 0.04 | 0.83 | 0.65 | 0.52 | 4.38 | |||||||||||||
| 2005 | 0.86 | 0.91 | 0.20 | 0.00 | 0.00 | a | 0.00 | 0.17 | 1.53 | 0.02 | 0.88 | 0.00 | 0.00 | 4.57 | ||||||||||||
| 2006 | 0.00 | 0.00 | 0.38 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 | 0.00 | 0.00 | 0.42 | |||||||||||||
| 2007 | 0.00 | 0.00 | 0.03 | 0.02 | 0.00 | 0.00 | 0.00 | 0.14 | 0.37 | 0.00 | 1.03 | 0.05 | 1.64 | |||||||||||||
| 2008 | 0.85 | a | 0.00 | 0.00 | 0.00 | 0.02 | 0.00 | 0.12 | 0.47 | 0.06 | 0.00 | a | 0.03 | 1.05 | 2.60 | |||||||||||
| 2009 | 0.00 | 0.38 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.21 | 0.59 | |||||||||||||
| 2010 | 2.06 | 0.42 | a | 0.62 | 0.23 | 0.00 | 0.00 | 0.00 | 0.16 | 0.00 | 1.44 | 0.00 | 0.42 | 5.35 | ||||||||||||
| 2011 | 0.00 | 0.78 | 0.00 | a | 0.00 | 0.00 | 0.00 | 0.34 | a | 0.00 | 0.02 | 0.00 | 0.13 | 0.42 | 1.69 | |||||||||||
| 2012 | 0.00 | a | 0.14 | a | 0.00 | 0.00 | 0.00 | 0.00 | a | 0.43 | 0.19 | 0.04 | a | 0.00 | 0.00 | 0.43 | 1.23 | |||||||||
| 2013 | 0.63 | a | 0.03 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | a | 0.56 | 0.72 | a | 0.00 | 1.12 | a | 0.04 | 3.13 | |||||||||
| 2014 | 0.00 | a | 0.00 | 0.00 | 0.00 | 0.00 | a | 0.00 | 0.08 | 0.44 | a | 0.00 | 0.00 | 0.00 | 0.48 | 1.00 | ||||||||||
| 2015 | 0.30 | a | 0.00 | a | 0.63 | a | 0.00 | b | 0.70 | 0.07 | a | 1.08 | 0.00 | h | 0.00 | b | 0.00 | a | 0.02 | 0.06 | 2.86 | a | ||||
| 2016 | 0.43 | 0.00 | 0.00 | b | 0.30 | 0.00 | 0.00 | 0.00 | 0.00 | a | 0.00 | h | 0.03 | f | 0.01 | b | 1.09 | c | 1.83 | b | ||||||
| 2017 | 0.98 | 0.48 | c | 0.00 | b | 0.00 | a | 0.13 | b | 0.00 | b | 0.00 | b | 0.10 | c | 0.08 | 0.00 | 0.00 | a | 0.00 | d | 1.77 | ||||
| 2018 | 0.00 | a | 0.02 | a | 0.02 | 0.00 | 0.00 | h | 0.00 | g | 0.00 | 0.00 | b | 0.00 | a | 0.02 | a | 0.00 | l | 2.03 | 2.09 | c | ||||
| 2019 | 0.30 | a | 0.22 | 0.11 | a | 0.00 | 0.04 | 0.00 | a | 0.00 | a | 0.00 | b | 0.57 | a | 0.00 | 1.70 | c | 0.54 | f | 2.94 | a | ||||
| 2020 | 0.00 | 0.56 | b | 1.53 | 0.68 | 0.00 | 0.00 | b | 0.00 | a | 0.00 | 0.00 | 0.00 | a | 0.00 | a | 0.00 | a | 2.77 | |||||||
| 2021 | 0.88 | 0.00 | a | 0.00 | a | 0.00 | a | 0.00 | 0.00 | c | 0.00 | 0.15 | a | 0.28 | a | 0.09 | 0.00 | a | 0.35 | a | 1.75 | |||||
| 2022 | 0.00 | e | 0.00 | a | 0.03 | 0.00 | 0.00 | 0.00 | a | 0.00 | a | 0.08 | 1.59 | a | 0.00 | d | 0.00 | b | 0.09 | 1.79 | ||||||
| 2023 | 0.61 | a | 0.02 | 0.26 | 0.00 | d | 0.00 | 0.00 | 0.00 | 1.52 | 0.70 | 0.00 | 0.14 | 0.02 | 3.27 | |||||||||||
| 2024 | 1.42 | a | 0.23 | a | 0.07 | i | 0.00 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.65 | j |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.37 | 0.33 | 0.23 | 0.07 | 0.02 | 0.01 | 0.09 | 0.32 | 0.28 | 0.25 | 0.19 | 0.40 | 2.53 | |||||||||||||
| S.D. | 0.49 | 0.47 | 0.39 | 0.16 | 0.08 | 0.03 | 0.20 | 0.56 | 0.72 | 0.54 | 0.37 | 0.59 | 1.52 | |||||||||||||
| SKEW | 1.48 | 1.96 | 2.67 | 2.61 | 6.25 | 5.78 | 3.21 | 2.53 | 4.24 | 2.38 | 2.64 | 2.09 | 0.58 | |||||||||||||
| MAX | 2.06 | 2.16 | 1.96 | 0.72 | 0.70 | 0.25 | 1.08 | 2.98 | 5.13 | 2.41 | 1.70 | 2.72 | 6.80 | |||||||||||||
| 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 | 0.25 | |||||||||||||
| YRS | 89 | 92 | 90 | 92 | 91 | 91 | 91 | 91 | 91 | 90 | 91 | 90 | 79 | |||||||||||||