YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1936 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 0.32 | 0.32 | j | ||
1937 | 0.12 | 0.07 | 0.86 | 1.32 | 6.71 | 2.92 | 0.46 | 0.22 | 1.70 | 0.60 | 0.00 | 0.23 | 15.21 | |||||||||||||
1938 | 0.08 | 1.21 | 0.33 | 0.27 | 2.71 | 3.35 | 1.88 | 0.21 | 2.39 | 1.96 | 0.16 | 1.22 | 15.77 | |||||||||||||
1939 | 1.06 | 0.29 | 0.30 | 0.69 | 1.62 | 0.79 | 2.84 | 1.98 | 1.64 | 0.17 | b | 0.15 | 0.84 | 12.37 | ||||||||||||
1940 | 0.24 | 0.96 | 0.99 | 0.96 | 2.72 | 0.25 | 1.87 | 2.20 | 0.00 | 0.00 | 2.73 | 0.32 | 13.24 | |||||||||||||
1941 | 0.58 | 0.48 | 2.21 | 2.40 | 4.64 | 3.55 | 2.20 | 2.22 | 8.66 | 2.62 | 0.00 | 0.02 | 29.58 | |||||||||||||
1942 | 0.00 | 0.21 | 0.28 | 3.87 | 0.71 | 0.99 | 0.93 | 4.64 | i | 1.88 | 1.50 | 0.00 | 0.59 | 10.96 | a | |||||||||||
1943 | 0.03 | 0.07 | 0.03 | 0.01 | 1.44 | 2.02 | 1.91 | 1.65 | 0.71 | 0.00 | 0.26 | 1.52 | 9.65 | |||||||||||||
1944 | 0.49 | 0.32 | 0.12 | 1.78 | 1.70 | 0.58 | 2.61 | r | 2.13 | 1.70 | 0.85 | 0.62 | 0.66 | 10.95 | a | |||||||||||
1945 | 1.12 | 0.06 | 0.09 | 0.34 | 1.38 | 1.06 | 1.51 | 4.13 | 1.17 | 0.61 | 0.00 | 0.00 | 11.47 | |||||||||||||
1946 | 0.03 | 0.06 | 0.38 | 0.20 | 0.96 | 0.09 | 3.07 | 2.69 | 2.53 | 1.00 | 1.19 | 0.04 | 12.24 | |||||||||||||
1947 | 0.24 | 0.01 | 0.25 | 0.75 | 2.90 | 0.30 | 0.96 | 2.66 | 0.71 | 0.55 | 0.36 | 0.79 | 10.48 | |||||||||||||
1948 | 0.38 | 1.43 | 1.37 | 0.65 | 4.10 | 2.78 | 1.44 | 2.71 | 0.00 | 1.05 | 0.18 | 0.00 | 16.09 | |||||||||||||
1949 | 0.82 | 2.14 | 0.34 | 2.07 | 0.89 | 3.21 | a | 4.34 | 1.32 | 1.59 | 0.04 | 0.01 | 0.59 | 17.36 | ||||||||||||
1950 | 0.00 | 0.06 | 0.00 | 0.20 | 0.41 | 1.32 | 6.12 | 1.17 | 2.26 | 0.11 | 0.00 | 0.12 | 11.77 | |||||||||||||
1951 | 0.57 | 0.27 | 0.68 | 0.36 | 1.64 | 1.33 | 0.93 | 0.86 | 0.03 | 0.35 | 0.12 | 0.10 | 7.24 | |||||||||||||
1952 | 0.25 | 0.56 | 1.33 | 1.68 | 0.21 | 0.47 | 2.95 | 2.32 | 0.29 | 0.00 | 0.94 | 0.32 | 11.32 | |||||||||||||
1953 | 0.00 | 0.22 | 0.50 | 0.03 | 1.06 | 0.11 | 3.50 | 4.04 | 0.29 | 0.97 | 0.80 | 1.01 | 12.53 | |||||||||||||
1954 | 0.24 | 0.03 | 0.00 | 0.08 | 2.30 | 0.00 | 0.50 | 3.08 | 1.86 | 2.36 | 0.15 | 0.04 | 10.64 | |||||||||||||
1955 | 0.15 | 0.23 | 0.00 | 0.30 | 1.11 | 0.17 | 5.60 | 1.88 | 1.26 | 0.00 | 0.01 | 0.08 | 10.79 | |||||||||||||
1956 | 0.00 | 0.07 | 0.00 | 0.15 | 0.37 | 1.26 | 1.96 | 1.67 | 0.00 | 0.86 | 0.01 | 0.00 | 6.35 | |||||||||||||
1957 | 0.19 | 0.29 | 1.14 | 0.92 | 1.42 | 0.43 | 2.00 | 1.98 | 0.58 | 3.84 | 0.22 | 0.00 | 13.01 | |||||||||||||
1958 | 0.54 | 0.17 | 3.18 | 2.01 | 1.38 | 1.13 | 1.09 | 3.64 | 0.50 | 1.06 | 0.05 | 0.71 | 15.46 | |||||||||||||
1959 | 0.16 | 0.13 | 0.01 | 0.61 | 3.10 | 0.45 | 2.09 | 6.65 | 0.16 | 2.17 | 0.02 | 2.02 | 17.57 | |||||||||||||
1960 | 0.71 | 0.06 | 1.46 | 0.00 | 0.20 | 5.08 | 4.39 | 3.67 | 1.84 | 4.62 | 0.01 | 1.39 | 23.43 | |||||||||||||
1961 | 0.07 | 0.38 | 0.80 | 1.55 | 0.93 | 2.33 | 2.80 | 1.56 | 2.31 | 0.04 | 0.45 | 0.19 | 13.41 | |||||||||||||
1962 | 0.05 | 0.05 | 0.08 | 0.40 | 0.18 | 1.08 | 4.84 | 0.20 | 1.29 | 0.20 | 0.33 | 0.77 | 9.47 | |||||||||||||
1963 | 0.36 | 1.38 | 0.09 | 0.22 | 0.04 | 0.49 | 0.61 | 4.83 | 1.67 | 0.20 | 0.21 | 0.04 | 10.14 | |||||||||||||
1964 | 0.03 | 0.33 | 0.13 | 0.68 | 1.29 | 0.53 | 1.16 | 0.79 | 1.77 | 0.05 | 0.87 | 0.17 | 7.80 | |||||||||||||
1965 | 0.14 | 0.20 | 0.94 | 1.06 | 0.85 | 4.33 | 2.69 | 1.31 | 2.29 | 0.82 | 0.00 | 0.68 | 15.31 | |||||||||||||
1966 | 0.43 | 0.35 | 0.00 | 0.13 | 0.59 | 2.11 | 1.62 | 3.19 | 0.11 | 0.00 | 0.00 | 0.20 | 8.73 | |||||||||||||
1967 | 0.06 | 0.16 | 0.01 | 0.05 | 0.84 | 2.71 | 3.97 | 0.93 | 0.78 | 0.23 | 0.12 | 0.35 | 10.21 | |||||||||||||
1968 | 0.65 | 0.33 | 0.40 | 0.71 | 0.52 | 0.15 | 4.88 | 4.02 | 0.30 | 0.55 | 0.28 | 0.22 | 13.01 | |||||||||||||
1969 | 0.00 | 0.87 | 0.62 | 1.07 | 2.48 | 4.00 | 2.25 | 2.13 | 2.33 | 2.90 | 0.17 | 0.64 | 19.46 | |||||||||||||
1970 | 0.02 | 0.00 | 0.29 | 1.65 | 0.18 | 0.26 | 2.34 | 0.48 | 1.76 | 2.02 | 0.11 | 0.00 | 9.11 | |||||||||||||
1971 | 0.23 | 0.04 | 0.09 | 0.65 | 0.11 | 0.20 | 3.69 | 1.18 | 1.45 | 0.81 | 1.17 | 1.02 | 10.64 | |||||||||||||
1972 | 0.00 | 0.00 | 0.09 | 0.03 | 1.22 | 0.96 | 2.02 | 3.96 | 5.38 | 2.07 | 0.96 | 0.18 | 16.87 | |||||||||||||
1973 | 0.58 | 0.74 | 2.12 | 0.80 | 0.77 | 0.95 | 4.44 | 0.35 | 0.25 | 0.81 | 0.00 | 0.55 | 12.36 | |||||||||||||
1974 | 0.58 | 0.05 | 0.17 | 0.38 | 0.00 | 0.98 | 0.63 | 1.57 | 2.12 | 2.41 | 0.18 | 0.44 | 9.51 | |||||||||||||
1975 | 0.45 | 0.37 | 0.19 | 0.72 | 1.06 | 0.92 | 3.58 | 0.67 | 2.03 | 0.01 | 0.76 | 0.18 | 10.94 | |||||||||||||
1976 | 0.18 | 0.46 | 0.01 | 1.02 | 1.77 | 1.65 | 3.10 | 0.85 | 1.86 | 0.45 | 0.09 | a | 0.00 | 11.44 | ||||||||||||
1977 | 0.34 | 0.10 | 0.12 | 2.64 | 1.41 | 0.45 | 3.15 | 4.13 | 1.75 | 0.27 | 0.55 | 0.05 | 14.96 | |||||||||||||
1978 | 0.85 | 0.18 | 0.81 | 0.02 | 1.85 | 5.90 | 0.15 | 0.86 | 0.83 | 0.16 | 2.82 | a | 0.28 | 14.71 | ||||||||||||
1979 | 1.06 | 0.00 | 0.68 | 1.28 | 2.25 | 2.23 | 2.76 | 3.36 | 0.55 | 0.53 | 0.52 | 0.21 | 15.43 | |||||||||||||
1980 | 0.33 | 0.84 | 0.80 | 1.82 | 2.01 | 0.28 | 1.15 | 1.58 | 2.37 | 0.02 | 0.41 | 0.06 | 11.67 | |||||||||||||
1981 | 0.00 | 0.08 | 1.21 | 0.62 | 1.30 | 0.76 | 1.49 | 5.31 | 0.61 | 1.30 | 0.08 | 0.05 | 12.81 | |||||||||||||
1982 | 0.14 | a | 0.30 | 0.54 | 0.08 | 1.45 | 3.24 | 3.67 | a | 3.44 | 0.70 | 1.63 | 1.17 | 0.86 | 17.22 | |||||||||||
1983 | 0.76 | 0.72 | 1.34 | 0.63 | 0.98 | 1.77 | 0.53 | 1.73 | 0.26 | 1.55 | 0.49 | 0.61 | 11.37 | |||||||||||||
1984 | 0.20 | 0.03 | 0.92 | d | 0.89 | 2.53 | 2.06 | 1.22 | 2.51 | 1.05 | 3.41 | 1.50 | 1.20 | a | 17.52 | |||||||||||
1985 | 0.86 | 0.36 | 2.87 | 1.67 | 1.90 | 2.45 | a | 0.85 | 4.25 | 2.56 | 4.24 | a | 0.33 | i | 0.00 | 22.01 | a | |||||||||
1986 | 0.10 | a | 1.51 | 0.15 | d | 0.21 | 3.49 | 3.49 | 1.85 | 1.99 | 2.17 | 1.94 | 3.04 | 0.60 | 20.54 | |||||||||||
1987 | 1.77 | 1.42 | 0.25 | 0.61 | 4.00 | 1.86 | 0.37 | 5.68 | 0.93 | 0.04 | 0.90 | 0.80 | 18.63 | |||||||||||||
1988 | 0.21 | 0.01 | 0.49 | 1.74 | 2.33 | a | 4.52 | 4.24 | 1.65 | 2.42 | 0.42 | 0.19 | 0.18 | 18.40 | ||||||||||||
1989 | 0.30 | 0.54 | 0.22 | 0.13 | 0.63 | 1.61 | 2.33 | 3.73 | 1.95 | 0.44 | 0.00 | 0.22 | 12.10 | |||||||||||||
1990 | 0.68 | 1.38 | 0.90 | 0.22 | 0.55 | 0.28 | 3.79 | 5.74 | 2.84 | 0.89 | 1.24 | 0.55 | 19.06 | |||||||||||||
1991 | 0.42 | 0.02 | 0.37 | 0.00 | 2.07 | 2.68 | 4.54 | 4.37 | 4.76 | 0.88 | 1.69 | a | 1.18 | 22.98 | ||||||||||||
1992 | 0.36 | 0.31 | 0.06 | 0.66 | 1.19 | 1.31 | 3.36 | 2.55 | 0.40 | 0.20 | 0.06 | d | 0.57 | 11.03 | ||||||||||||
1993 | 0.40 | 0.64 | 1.02 | 0.18 | 0.66 | 2.02 | 3.50 | 2.74 | 0.40 | 0.15 | 0.59 | 0.05 | 12.35 | |||||||||||||
1994 | 0.07 | 0.10 | 2.04 | 0.62 | 3.89 | 1.50 | 1.11 | 0.83 | 1.21 | 0.84 | 0.35 | 0.33 | 12.89 | |||||||||||||
1995 | 0.42 | 0.01 | 0.69 | 0.91 | 3.25 | 1.01 | 1.96 | 4.00 | 2.49 | 0.05 | 0.07 | 0.83 | 15.69 | |||||||||||||
1996 | 0.13 | 0.03 | 0.00 | 0.00 | 0.44 | 2.84 | 6.78 | 1.77 | 1.68 | 0.95 | 0.80 | 2.05 | 17.47 | |||||||||||||
1997 | 0.51 | 1.12 | 0.12 | 4.39 | 1.84 | 5.84 | 3.69 | 0.96 | 2.94 | 0.07 | 0.83 | 1.92 | c | 24.23 | ||||||||||||
1998 | 0.00 | 0.28 | 2.32 | 0.63 | 0.04 | 0.00 | 3.65 | 3.23 | 0.58 | 2.93 | 1.48 | 0.18 | 15.32 | |||||||||||||
1999 | 0.33 | 0.00 | 0.93 | 2.42 | 3.82 | 3.12 | 1.78 | 2.95 | 1.07 | 0.51 | 0.04 | 0.15 | 17.12 | |||||||||||||
2000 | 0.00 | 0.00 | 2.23 | 0.23 | 0.28 | 3.73 | 4.61 | 1.19 | 0.07 | 5.47 | 0.58 | 0.89 | 19.28 | |||||||||||||
2001 | 2.29 | 0.75 | 1.27 | 0.09 | 1.67 | 1.17 | 3.17 | 1.38 | 0.21 | 0.29 | 1.21 | 0.34 | 13.84 | |||||||||||||
2002 | 0.58 | 0.02 | 0.00 | 0.83 | 0.30 | 0.80 | 3.47 | 0.68 | 5.97 | 2.19 | 0.21 | 0.90 | 15.95 | |||||||||||||
2003 | 0.00 | 0.03 | 0.83 | 0.01 | 0.26 | 3.91 | 0.18 | 2.55 | 0.16 | 1.03 | 0.80 | 0.00 | 9.76 | |||||||||||||
2004 | 0.26 | 0.53 | 0.94 | 4.32 | 0.00 | 1.35 | 2.87 | 3.58 | 1.78 | 1.65 | 1.02 | 0.25 | 18.55 | |||||||||||||
2005 | 1.61 | 0.43 | 1.82 | 1.29 | 3.60 | 1.50 | 2.14 | 2.74 | 3.80 | 0.37 | 0.00 | 0.00 | 19.30 | |||||||||||||
2006 | 0.17 | 0.20 | 0.08 | ----- | z | 0.61 | 2.87 | 1.13 | 6.71 | 1.90 | 1.36 | 0.00 | 0.80 | 15.83 | a | |||||||||||
2007 | 0.37 | 0.18 | 0.31 | 0.52 | 1.19 | 1.49 | 1.06 | 2.07 | 0.97 | 0.43 | 0.24 | 0.79 | 9.62 | |||||||||||||
2008 | 0.03 | 0.03 | 0.32 | 0.50 | 4.28 | 1.33 | 2.05 | 2.73 | 0.05 | 1.07 | 0.06 | 0.25 | 12.70 | |||||||||||||
2009 | 0.00 | 0.08 | 0.00 | 2.34 | 0.80 | 0.36 | 3.49 | 1.24 | 1.36 | 1.72 | 0.10 | 0.81 | 12.30 | |||||||||||||
2010 | 0.73 | 1.28 | 1.30 | 0.21 | 0.92 | 4.09 | 2.44 | 3.12 | 1.51 | 0.82 | 0.00 | 0.16 | 16.58 | |||||||||||||
2011 | 0.07 | 0.19 | 0.75 | 0.10 | 0.13 | 0.05 | 0.65 | 2.15 | 2.66 | 1.01 | 0.00 | 1.98 | 9.74 | |||||||||||||
2012 | 0.00 | 0.01 | 0.00 | 1.04 | 1.08 | 3.31 | 0.60 | 0.90 | 1.98 | d | 0.19 | ----- | z | 0.43 | 9.54 | a | ||||||||||
2013 | 0.21 | ----- | z | 0.00 | b | 0.07 | 0.36 | b | 1.69 | e | 5.66 | 0.97 | 8.52 | 0.09 | 0.66 | b | 0.08 | a | 18.31 | a | ||||||
2014 | 0.00 | 0.03 | 0.18 | a | 0.81 | 1.75 | 0.48 | 1.92 | 1.93 | 2.23 | 0.30 | a | 0.75 | a | 0.30 | 10.68 | ||||||||||
2015 | 1.22 | 1.00 | 0.21 | 0.99 | 2.97 | 2.87 | 4.93 | 3.41 | 1.03 | 4.47 | b | 1.11 | 1.01 | 25.22 | ||||||||||||
2016 | 0.00 | 0.23 | 0.05 | 0.04 | a | 0.58 | e | 2.78 | 0.68 | 2.90 | 2.70 | 0.10 | 2.06 | 0.22 | 12.34 | |||||||||||
2017 | 0.35 | 0.20 | a | 0.99 | 2.21 | 1.72 | 0.65 | 0.82 | 4.41 | a | 4.68 | b | 4.06 | 0.00 | 0.00 | 20.09 | ||||||||||
2018 | 0.00 | 0.02 | 0.33 | 0.55 | 0.36 | 1.65 | 0.95 | 1.15 | a | 1.94 | 4.53 | a | 0.23 | 1.07 | 12.78 | |||||||||||
2019 | 0.74 | 0.00 | 0.61 | 0.87 | 2.50 | b | 0.37 | 3.08 | 1.61 | c | 1.96 | 0.99 | a | 0.30 | a | 0.12 | 13.15 | |||||||||
2020 | 0.31 | d | 0.35 | 0.13 | 0.04 | 0.77 | 0.96 | 3.66 | 1.22 | b | 0.96 | 0.78 | b | 0.00 | 0.08 | 9.26 | ||||||||||
2021 | 0.26 | 0.18 | 1.88 | 0.10 | 2.77 | 2.31 | a | 2.45 | 1.43 | 0.62 | 1.88 | 0.00 | a | 0.00 | 13.88 | |||||||||||
2022 | 0.10 | 0.06 | f | 0.41 | 0.00 | 0.20 | 3.29 | 1.45 | 1.77 | 0.79 | 1.82 | 0.06 | 0.00 | 9.89 | a | |||||||||||
2023 | 0.00 | 0.16 | 0.53 | 0.49 | 3.63 | c | 1.69 | a | 1.48 | 1.48 | 1.05 | 0.73 | 0.23 | 0.47 | 11.94 | |||||||||||
2024 | 0.38 | 0.67 | 0.32 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 1.37 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.36 | 0.37 | 0.64 | 0.85 | 1.55 | 1.76 | 2.47 | 2.39 | 1.69 | 1.17 | 0.49 | 0.48 | 14.16 | |||||||||||||
S.D. | 0.42 | 0.45 | 0.70 | 0.93 | 1.30 | 1.41 | 1.51 | 1.47 | 1.59 | 1.27 | 0.65 | 0.50 | 4.37 | |||||||||||||
SKEW | 2.08 | 1.71 | 1.51 | 1.87 | 1.24 | 0.89 | 0.59 | 0.84 | 2.28 | 1.51 | 2.02 | 1.38 | 0.98 | |||||||||||||
MAX | 2.29 | 2.14 | 3.18 | 4.39 | 6.71 | 5.90 | 6.78 | 6.71 | 8.66 | 5.47 | 3.04 | 2.05 | 29.58 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.15 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 6.35 | |||||||||||||
YRS | 88 | 86 | 88 | 86 | 87 | 87 | 86 | 86 | 87 | 87 | 86 | 88 | 80 |