YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1937 | 0.22 | 0.44 | 1.58 | 1.73 | 3.63 | 1.58 | 0.49 | 0.50 | 1.39 | ----- | z | ----- | z | ----- | z | 11.56 | c | |||||||||
1938 | ----- | z | 0.53 | 0.88 | 0.93 | 2.23 | 1.19 | 3.52 | 1.71 | 1.94 | 3.00 | 0.06 | 0.25 | 16.24 | a | |||||||||||
1939 | 2.11 | 0.32 | 0.18 | 2.67 | 0.91 | 2.80 | 2.68 | 3.48 | 0.11 | 0.87 | 0.07 | 1.19 | 17.39 | |||||||||||||
1940 | 0.98 | 0.53 | 0.27 | 0.43 | 2.35 | 1.19 | 0.04 | 0.77 | 0.55 | ----- | z | ----- | z | ----- | z | 7.11 | c | |||||||||
1941 | ----- | z | ----- | z | 1.37 | 2.28 | 8.33 | 1.87 | 6.54 | 2.41 | 2.45 | 5.41 | 0.29 | 0.26 | 31.21 | b | ||||||||||
1942 | 0.00 | 0.04 | 0.82 | 4.25 | 0.39 | 5.58 | 2.97 | 1.97 | 0.43 | 6.66 | 0.00 | 0.81 | 23.92 | |||||||||||||
1943 | 0.00 | 0.00 | 0.10 | 1.00 | 1.29 | 2.29 | 4.33 | 2.82 | 0.02 | 0.50 | 0.12 | 2.16 | 14.63 | |||||||||||||
1944 | 1.51 | 0.71 | ----- | z | 2.39 | 4.02 | 4.19 | 1.54 | 1.97 | 0.60 | 0.60 | 0.74 | 1.30 | 19.57 | a | |||||||||||
1945 | 1.18 | 0.74 | 0.35 | 0.85 | 0.48 | 2.85 | 0.95 | 4.02 | 3.09 | 2.11 | 0.00 | 0.12 | 16.74 | |||||||||||||
1946 | 0.10 | 0.45 | 0.10 | 1.11 | 2.92 | 1.81 | 1.82 | 2.85 | 2.57 | 4.08 | 1.55 | 0.00 | 19.36 | |||||||||||||
1947 | 0.32 | 0.15 | 0.98 | 1.92 | 3.93 | 1.73 | 1.63 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9.03 | f | ||||||
1948 | 0.56 | 2.48 | a | 0.90 | 0.26 | 3.02 | 2.58 | 1.60 | 6.00 | 0.91 | 0.93 | 1.62 | d | 0.00 | u | 20.86 | a | |||||||||
1949 | 0.54 | u | 0.49 | u | 0.83 | 2.15 | 5.06 | 1.86 | 7.03 | 2.82 | 1.94 | 0.46 | 0.05 | 0.58 | 22.78 | b | ||||||||||
1950 | 0.02 | 0.14 | 0.11 | 1.69 | ----- | z | 5.49 | 7.50 | 3.54 | 5.62 | 1.27 | 0.00 | 0.00 | 25.38 | a | |||||||||||
1951 | 0.93 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.93 | k | |
1952 | ----- | z | 0.25 | 1.13 | 3.59 | 0.81 | 2.13 | 2.21 | 4.12 | 0.36 | 0.00 | ----- | z | ----- | z | 14.60 | c | |||||||||
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 4.24 | 4.19 | 0.03 | 2.24 | 0.54 | 0.43 | 11.67 | f | ||||||
1954 | ----- | z | ----- | z | ----- | z | ----- | z | 3.90 | 3.82 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 7.72 | j | ||
1955 | ----- | z | ----- | z | ----- | z | ----- | z | 3.10 | 1.17 | 1.73 | 1.28 | ----- | z | ----- | z | 0.07 | ----- | z | 7.35 | g | |||||
1956 | ----- | z | ----- | z | 0.00 | 0.05 | 2.81 | 1.36 | 3.89 | 1.79 | 0.35 | 0.20 | 0.00 | 0.00 | 10.45 | b | ||||||||||
1957 | 0.50 | 0.28 | 3.43 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 2.18 | 0.79 | 0.00 | 7.18 | f | ||||||
1958 | 0.51 | 0.57 | 2.00 | 2.13 | 5.22 | 1.87 | 10.84 | 1.07 | 1.42 | 0.13 | 0.59 | 0.44 | 26.79 | |||||||||||||
1959 | 0.48 | 0.11 | 0.76 | 0.64 | 2.97 | 2.59 | 4.00 | 4.80 | 0.65 | 2.23 | 0.12 | 4.28 | 23.63 | |||||||||||||
1960 | 1.48 | 1.22 | 0.57 | 0.49 | 0.42 | 4.09 | 6.27 | 1.65 | 6.41 | 3.23 | 0.10 | 1.31 | 27.24 | |||||||||||||
1961 | 0.13 | 1.00 | 3.16 | 0.27 | 1.32 | 4.88 | 7.19 | 1.66 | 1.65 | 1.44 | 1.71 | 0.40 | 24.81 | |||||||||||||
1962 | 0.58 | 0.50 | 0.68 | 0.30 | 0.63 | 5.11 | 6.05 | 1.13 | 1.67 | 0.46 | 0.84 | 0.34 | 18.29 | |||||||||||||
1963 | 0.15 | 0.74 | 0.00 | 0.11 | 2.51 | 1.67 | 2.63 | 2.58 | 2.60 | 0.12 | 0.19 | 0.70 | 14.00 | |||||||||||||
1964 | 0.00 | 1.95 | 0.00 | 0.12 | 2.45 | 1.61 | 1.72 | 1.38 | 2.64 | 0.00 | 2.21 | 0.43 | 14.51 | |||||||||||||
1965 | 0.12 | 0.39 | 0.63 | 0.16 | 3.61 | 10.21 | 1.58 | 2.02 | 1.03 | 1.19 | 0.00 | 1.19 | 22.13 | |||||||||||||
1966 | 0.75 | 0.93 | 0.10 | 0.07 | 0.01 | 2.93 | 0.92 | 1.96 | 0.27 | 0.18 | 0.00 | 0.06 | 8.18 | |||||||||||||
1967 | 0.02 | 0.35 | 0.04 | 2.37 | 3.43 | 5.58 | 2.25 | 0.72 | 0.53 | 0.32 | 0.18 | 0.44 | 16.23 | |||||||||||||
1968 | 0.90 | 0.44 | 0.48 | 1.18 | 4.19 | 3.42 | 2.35 | 1.64 | 0.59 | 3.45 | 0.87 | 0.18 | 19.69 | |||||||||||||
1969 | 0.00 | 1.51 | 1.48 | 0.32 | 3.56 | 2.61 | 4.12 | 0.79 | 4.72 | 1.71 | 0.40 | 0.15 | 21.37 | |||||||||||||
1970 | 0.10 | 0.00 | 0.72 | 2.29 | 0.33 | 1.30 | 1.63 | 3.31 | 0.68 | 1.30 | 0.33 | 0.00 | 11.99 | |||||||||||||
1971 | 0.45 | 1.54 | 0.11 | 0.89 | 1.25 | 1.71 | 7.14 | 0.58 | 2.63 | 1.96 | 2.13 | 0.60 | 20.99 | |||||||||||||
1972 | 0.05 | 0.08 | 0.02 | 0.09 | 1.32 | 6.10 | 3.72 | 2.52 | 2.66 | 1.43 | 1.86 | 0.25 | 20.10 | |||||||||||||
1973 | 0.41 | 0.47 | 4.54 | 2.12 | 1.50 | 0.21 | 3.23 | 1.09 | 1.47 | 0.58 | 0.51 | 0.28 | 16.41 | |||||||||||||
1974 | 0.46 | 0.00 | 1.40 | 0.05 | 1.28 | 1.76 | 0.34 | 4.98 | 1.75 | 2.84 | 0.16 | 0.26 | 15.28 | |||||||||||||
1975 | 0.48 | 1.12 | 0.04 | 1.57 | 3.83 | 3.00 | 4.83 | 1.54 | 0.61 | 0.00 | 0.80 | 0.04 | 17.86 | |||||||||||||
1976 | 0.02 | 0.00 | 0.43 | 2.61 | 3.66 | 0.57 | 0.35 | 1.26 | 2.95 | 0.33 | 0.06 | 0.00 | 12.24 | |||||||||||||
1977 | 0.41 | 0.32 | 0.22 | 2.74 | 1.60 | 0.37 | 1.58 | 3.23 | 2.11 | 0.11 | 0.69 | 0.22 | 13.60 | |||||||||||||
1978 | 1.15 | 1.79 | 0.09 | 0.61 | 5.70 | 3.81 | 0.31 | 1.03 | 0.88 | ----- | z | 1.23 | 0.25 | 16.85 | a | |||||||||||
1979 | 0.85 | 0.20 | 0.78 | 1.09 | 3.02 | 2.15 | 0.97 | 3.75 | 1.31 | 1.50 | 0.46 | 0.16 | 16.24 | |||||||||||||
1980 | 0.84 | 0.65 | 0.98 | 1.14 | 6.34 | 2.55 | 0.77 | 3.14 | 0.38 | 0.15 | 1.18 | 0.58 | 18.70 | |||||||||||||
1981 | 0.01 | 0.11 | 1.59 | 0.56 | 2.23 | 0.92 | 4.24 | 5.29 | 1.43 | 1.21 | 0.46 | 0.21 | 18.26 | |||||||||||||
1982 | 0.00 | 0.86 | 0.79 | 0.19 | 3.14 | 2.45 | 5.42 | 1.63 | 1.07 | 0.69 | 0.42 | 0.80 | 17.46 | |||||||||||||
1983 | 1.05 | 1.72 | 1.00 | 1.03 | 2.91 | 1.60 | 0.32 | 1.06 | 0.25 | 1.26 | 0.51 | 0.60 | 13.31 | |||||||||||||
1984 | 0.37 | 0.26 | 1.77 | 2.30 | 0.64 | 1.34 | 0.69 | 2.00 | 0.75 | 2.79 | 0.50 | 1.11 | 14.52 | |||||||||||||
1985 | 0.45 | 1.61 | 2.58 | 1.46 | 1.26 | 3.69 | 0.67 | 2.30 | 6.17 | 2.63 | 0.11 | 0.12 | 23.05 | |||||||||||||
1986 | 0.00 | 0.79 | 0.57 | 0.65 | 1.39 | 2.81 | 2.26 | 3.32 | 3.12 | 2.71 | 1.87 | 0.73 | 20.22 | |||||||||||||
1987 | 0.68 | 0.98 | 2.33 | 0.53 | 4.30 | 2.75 | 0.37 | 1.08 | 3.22 | 0.34 | 0.53 | 1.01 | 18.12 | |||||||||||||
1988 | 0.48 | 0.00 | 1.93 | 2.15 | 7.61 | 2.33 | 0.59 | 1.50 | 2.40 | 0.05 | 0.08 | 0.08 | 19.20 | |||||||||||||
1989 | 0.49 | 0.30 | 0.09 | 0.09 | 4.34 | 5.11 | 2.06 | 3.20 | 1.55 | 0.48 | 0.00 | 0.46 | 18.17 | |||||||||||||
1990 | 0.87 | 1.19 | 0.82 | 2.83 | 2.13 | 0.61 | 2.44 | 3.81 | 3.34 | 0.32 | 1.00 | 0.33 | 19.69 | |||||||||||||
1991 | 0.72 | a | 0.00 | 0.40 | 0.03 | 4.29 | 3.71 | 1.31 | 1.52 | 2.06 | 1.27 | 1.17 | 2.83 | 19.31 | ||||||||||||
1992 | 0.80 | 0.65 | 0.92 | 1.40 | 2.53 | 7.00 | 2.94 | 4.66 | 0.86 | 0.01 | 1.01 | 0.81 | 23.59 | |||||||||||||
1993 | ----- | z | 0.49 | 1.43 | 0.32 | 1.67 | 3.41 | 2.14 | 2.24 | 0.60 | 0.40 | 0.80 | 0.79 | 14.29 | a | |||||||||||
1994 | 0.37 | a | 0.00 | 0.66 | a | 0.81 | 2.21 | 1.14 | 2.75 | 4.36 | 0.96 | 1.39 | 0.62 | 0.54 | 15.81 | |||||||||||
1995 | 0.91 | 0.04 | 0.76 | a | 1.10 | 3.51 | 1.59 | 4.48 | 2.13 | 0.92 | 0.55 | 0.00 | 0.11 | a | 16.10 | |||||||||||
1996 | 0.00 | 0.50 | 0.00 | a | 0.00 | 0.00 | c | 1.98 | ----- | z | ----- | z | 10.90 | 2.30 | 0.00 | b | 0.00 | a | 15.68 | b | ||||||
1997 | 0.00 | g | 0.15 | d | 0.00 | 4.25 | 2.25 | 2.14 | 5.44 | 3.27 | 1.54 | 0.15 | a | 0.08 | b | 1.45 | a | 20.72 | a | |||||||
1998 | 0.00 | 1.09 | 2.17 | 0.37 | 1.49 | 0.03 | 4.87 | 2.54 | 0.00 | 0.00 | 1.00 | 0.08 | a | 13.64 | ||||||||||||
1999 | 0.78 | 0.00 | 1.13 | 6.11 | ----- | z | 2.19 | 2.93 | 1.39 | 0.16 | 0.37 | 0.00 | 0.16 | 15.22 | a | |||||||||||
2000 | 0.10 | 0.08 | 4.19 | 0.44 | 0.93 | 3.22 | 0.78 | 0.08 | 0.35 | 5.19 | 0.17 | 0.00 | b | 15.53 | ||||||||||||
2001 | ----- | z | 0.00 | g | 1.44 | 0.68 | 2.64 | 2.38 | 1.43 | 2.60 | 1.12 | 0.00 | 2.44 | 0.10 | 14.83 | b | ||||||||||
2002 | 0.70 | ----- | z | 0.16 | 0.82 | 0.18 | 1.78 | 1.77 | 5.63 | 1.27 | 3.21 | ----- | z | 0.72 | 16.24 | b | ||||||||||
2003 | 0.00 | 0.00 | 0.73 | 0.66 | 0.16 | 4.57 | 0.04 | 0.65 | 1.98 | 0.88 | 0.57 | 5.00 | 15.24 | |||||||||||||
2004 | 0.06 | 0.40 | 1.50 | 2.83 | 0.11 | 2.68 | 1.56 | 1.21 | 2.29 | v | 0.95 | x | 3.32 | b | 0.43 | 14.10 | b | |||||||||
2005 | 0.91 | a | 0.73 | 1.20 | a | 0.69 | ----- | z | 2.12 | 1.09 | 3.67 | 0.52 | 0.58 | 0.25 | 0.01 | 11.77 | a | |||||||||
2006 | 0.06 | 0.00 | 0.84 | a | 0.26 | 0.96 | 1.14 | 0.91 | 5.60 | 0.97 | 1.66 | 0.37 | 1.60 | 14.37 | ||||||||||||
2007 | 0.67 | 0.00 | 3.52 | 2.02 | 1.17 | 2.86 | a | 1.77 | 1.66 | 3.16 | 0.33 | 0.12 | 0.81 | 18.09 | ||||||||||||
2008 | 0.02 | 0.51 | 0.16 | 0.50 | 2.82 | 0.46 | 4.41 | 2.25 | 0.32 | 6.98 | 0.10 | 0.20 | 18.73 | |||||||||||||
2009 | 0.00 | b | 0.52 | 0.68 | 1.77 | 0.43 | 1.02 | 3.11 | a | 1.78 | a | 1.70 | 1.77 | 0.15 | 0.02 | 12.95 | ||||||||||
2010 | 0.80 | a | 1.44 | 1.68 | 1.57 | 2.41 | 2.14 | 2.71 | 5.06 | 0.50 | 0.53 | ----- | z | 0.51 | 19.35 | a | ||||||||||
2011 | 0.24 | g | 0.34 | e | 0.15 | 0.00 | 0.47 | 0.08 | b | 1.09 | 0.71 | 1.00 | 0.56 | j | ----- | z | 1.92 | h | 3.84 | d | ||||||
2012 | 0.00 | a | 0.25 | d | 1.31 | 2.85 | 0.00 | 4.05 | a | 0.18 | 1.93 | 1.46 | 0.15 | 0.00 | 1.23 | 13.41 | ||||||||||
2013 | 0.66 | 0.70 | f | 0.00 | 0.00 | 0.31 | 1.11 | 3.45 | 6.67 | c | 1.88 | 0.40 | 0.59 | 0.64 | 15.71 | a | ||||||||||
2014 | 0.10 | 0.12 | 0.20 | 0.21 | b | 2.87 | 3.99 | 3.29 | 1.79 | b | 2.13 | 0.81 | 0.12 | 0.06 | 15.69 | |||||||||||
2015 | 0.96 | 0.75 | 0.06 | 2.79 | 5.94 | 1.13 | 5.89 | 4.87 | 0.83 | 6.20 | 0.93 | 0.78 | 31.13 | |||||||||||||
2016 | 0.38 | 0.22 | 0.20 | 2.46 | 2.02 | 1.53 | 1.63 | 3.83 | 1.21 | 0.15 | 0.30 | 0.00 | 13.93 | |||||||||||||
2017 | 0.00 | 0.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | j | ||
2018 | 0.00 | 0.00 | 0.02 | 1.07 | 2.30 | 1.84 | 2.67 | 0.72 | 1.15 | 1.92 | 0.29 | 0.00 | 11.98 | |||||||||||||
2019 | 0.00 | 0.75 | 0.05 | 1.10 | 0.38 | x | 1.46 | 0.71 | 2.50 | 0.93 | 4.50 | 0.15 | 1.15 | 13.30 | a | |||||||||||
2020 | 0.39 | 0.15 | 1.30 | 1.00 | 0.16 | 3.34 | 4.33 | 2.09 | 1.20 | 1.42 | 0.15 | 0.15 | 15.68 | |||||||||||||
2021 | 0.16 | 0.07 | 1.91 | 0.09 | n | 2.80 | q | 2.35 | 2.71 | a | 1.22 | 0.80 | c | 0.48 | a | 0.00 | b | 0.00 | a | 9.70 | b | |||||
2022 | 0.09 | b | 0.30 | b | 0.60 | a | 1.60 | a | 1.12 | 2.08 | 2.38 | 2.26 | 0.58 | 1.52 | 0.05 | 0.00 | p | 12.58 | a | |||||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 0.44 | 0.53 | 0.94 | 1.29 | 2.39 | 2.56 | 2.77 | 2.50 | 1.65 | 1.48 | 0.56 | 0.60 | 17.77 | |||||||||||||
S.D. | 0.44 | 0.54 | 0.98 | 1.17 | 1.80 | 1.69 | 2.13 | 1.48 | 1.69 | 1.63 | 0.68 | 0.86 | 4.35 | |||||||||||||
SKEW | 1.11 | 1.36 | 1.64 | 1.36 | 0.92 | 1.59 | 1.15 | 0.77 | 2.83 | 1.65 | 1.78 | 3.17 | 0.72 | |||||||||||||
MAX | 2.11 | 2.48 | 4.54 | 6.11 | 8.33 | 10.21 | 10.84 | 6.67 | 10.90 | 6.98 | 3.32 | 5.00 | 31.13 | |||||||||||||
MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.04 | 0.08 | 0.00 | 0.00 | 0.00 | 0.00 | 8.18 | |||||||||||||
YRS | 74 | 76 | 80 | 79 | 77 | 82 | 80 | 80 | 79 | 76 | 76 | 75 | 54 |