YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 54.30 | t | 57.16 | 56.73 | a | 48.83 | a | 37.58 | 21.43 | 8.06 | 38.30 | f | ||||
1964 | 12.26 | 11.00 | 14.90 | 29.69 | a | 40.00 | 46.90 | a | 56.81 | 51.16 | 40.67 | 29.06 | 20.13 | 13.35 | 30.49 | |||||||||||
1965 | 14.74 | 11.04 | 13.00 | 32.90 | 40.26 | 49.87 | 54.71 | 50.06 | 39.37 | 34.23 | 24.40 | 13.03 | 31.47 | |||||||||||||
1966 | 4.83 | a | 9.57 | 18.93 | b | 24.55 | a | 34.29 | 45.83 | 55.10 | j | 49.14 | i | ----- | z | ----- | z | 23.45 | j | ----- | z | 23.00 | f | |||
1967 | 14.26 | ----- | z | 25.30 | h | 30.60 | 35.84 | 45.50 | 54.28 | f | 48.28 | f | 42.79 | f | 35.59 | i | 23.42 | r | ----- | z | 31.55 | h | ||||
1968 | ----- | z | 20.04 | a | 25.12 | o | 27.43 | 36.23 | 46.37 | 51.91 | i | 54.64 | i | 41.61 | b | 38.97 | a | 23.28 | a | ----- | z | 33.42 | e | |||
1969 | ----- | z | 20.53 | k | 14.77 | 32.70 | c | 41.55 | 46.30 | 56.00 | 55.84 | 47.07 | 27.77 | 21.09 | g | 15.23 | 37.47 | c | ||||||||
1970 | 10.29 | 16.36 | 17.61 | 25.20 | 39.58 | 47.96 | d | 54.65 | 53.58 | 41.03 | 28.48 | 21.47 | 10.68 | 30.57 | ||||||||||||
1971 | 11.29 | 16.89 | a | 17.90 | 30.17 | 38.48 | 48.72 | a | 53.13 | 53.61 | 39.60 | 30.68 | 19.40 | 10.00 | 30.82 | |||||||||||
1972 | 4.77 | 14.66 | 22.90 | 27.37 | 36.90 | 51.60 | 51.29 | 54.16 | 44.17 | 32.71 | 16.97 | 5.55 | 30.25 | |||||||||||||
1973 | 11.81 | 15.61 | 24.81 | 27.50 | 37.32 | 46.80 | 52.35 | 50.06 | 42.90 | 33.65 | 21.30 | 16.42 | 31.71 | |||||||||||||
1974 | 8.23 | 18.18 | 25.81 | 30.53 | 40.58 | 48.60 | 53.48 | 50.97 | 38.43 | 34.21 | b | 20.50 | 10.84 | 31.70 | ||||||||||||
1975 | 11.93 | a | 12.00 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 11.93 | k |
1976 | ----- | z | ----- | z | ----- | z | ----- | z | 32.61 | 44.24 | a | 53.00 | 50.79 | c | ----- | z | ----- | z | ----- | z | ----- | z | 45.16 | h | ||
1977 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 58.15 | d | 51.04 | h | 42.50 | j | 27.43 | j | ----- | z | ----- | z | 58.15 | k |
1978 | 4.21 | g | ----- | z | 27.85 | r | 32.52 | i | 37.92 | g | 48.46 | f | 55.59 | i | 49.72 | m | 40.87 | g | 26.44 | f | 15.11 | l | -0.21 | l | ----- | z |
1979 | -3.36 | t | 9.75 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 48.66 | a | 57.80 | a | 51.39 | 43.07 | c | 28.07 | a | 19.35 | d | 20.35 | e | 38.38 | e | |
1981 | 13.07 | b | 13.79 | 23.59 | b | 36.89 | c | 41.20 | a | 51.16 | e | 56.97 | a | 52.97 | 45.39 | b | 31.23 | 23.18 | b | 12.83 | a | 33.52 | ||||
1982 | 5.54 | c | 8.41 | a | 20.90 | 26.10 | 39.45 | ----- | z | 54.55 | 56.61 | 45.47 | 32.23 | 17.59 | a | 14.63 | a | 29.22 | a | |||||||
1983 | 19.11 | c | 17.85 | a | 25.90 | 25.75 | b | 37.24 | b | 48.37 | 54.00 | b | 56.97 | 42.40 | 32.55 | 20.10 | a | 0.83 | b | 31.76 | ||||||
1984 | 7.30 | a | 18.64 | a | 22.72 | b | 28.57 | 41.52 | 48.90 | a | 56.58 | 55.26 | 41.69 | a | 32.53 | a | 23.00 | a | 12.10 | 32.40 | ||||||
1985 | 7.17 | a | 11.07 | 24.27 | a | 30.83 | a | 43.23 | 46.23 | 52.55 | 50.35 | 41.87 | ----- | z | 15.05 | h | 5.55 | k | 34.17 | c | ||||||
1986 | 19.17 | a | 17.89 | 27.35 | 32.96 | b | 38.24 | b | 51.23 | 51.30 | a | 50.55 | 43.47 | 36.74 | h | 21.72 | a | 11.52 | 33.22 | a | ||||||
1987 | 15.11 | c | 21.85 | a | 21.52 | d | 30.10 | a | 45.00 | 47.93 | a | 53.97 | 52.61 | 41.77 | 27.35 | 22.40 | 12.12 | f | 34.51 | a | ||||||
1988 | -4.00 | r | 16.88 | e | 21.79 | c | 27.41 | a | 39.82 | c | 51.38 | a | 52.94 | 52.71 | 42.41 | a | 33.16 | 18.86 | a | 9.61 | c | 33.36 | a | |||
1989 | 11.77 | a | 6.93 | 23.03 | 31.87 | 41.81 | 49.60 | 57.77 | 54.35 | 43.48 | c | 32.58 | 21.07 | a | 8.06 | 31.86 | ||||||||||
1990 | 14.87 | 14.71 | 25.13 | a | 31.92 | d | 37.94 | 52.45 | a | 54.65 | 52.74 | 49.12 | e | 31.00 | a | 22.03 | 4.90 | 32.62 | ||||||||
1991 | 8.74 | 17.75 | 23.13 | 30.80 | 43.29 | 51.97 | 54.45 | 54.39 | 44.60 | 30.13 | a | 19.63 | 13.68 | 32.71 | ||||||||||||
1992 | 13.90 | 22.55 | 27.69 | b | 33.80 | 41.23 | 49.90 | 54.29 | 51.42 | 43.67 | 33.32 | 17.53 | 4.00 | 32.78 | ||||||||||||
1993 | 4.97 | a | 11.39 | 26.39 | 32.53 | 41.71 | 48.90 | a | 54.61 | 53.42 | 41.97 | 32.37 | a | 14.70 | 15.74 | 31.56 | ||||||||||
1994 | 16.68 | 11.32 | 24.61 | 32.87 | 42.71 | 53.10 | 54.52 | 55.94 | 45.90 | 35.48 | 21.47 | 16.29 | 34.24 | |||||||||||||
1995 | 14.63 | a | 19.37 | a | 23.03 | 28.33 | 40.71 | 48.83 | 53.67 | a | 55.39 | 45.97 | a | 30.87 | 22.31 | a | 13.93 | a | 33.09 | |||||||
1996 | 7.10 | a | 14.62 | 19.90 | 30.36 | b | 43.87 | 51.73 | 56.48 | 54.52 | 45.81 | c | 33.94 | 20.93 | 14.16 | 32.79 | ||||||||||
1997 | 11.71 | 18.44 | a | 22.23 | 26.56 | c | 39.94 | 53.27 | 56.45 | 57.19 | 49.03 | 32.53 | a | 20.30 | 17.06 | 33.73 | ||||||||||
1998 | 14.23 | 21.07 | 22.39 | 30.43 | 42.50 | a | 46.33 | 58.70 | a | 55.28 | b | 49.20 | 37.90 | a | 27.10 | 9.30 | a | 34.54 | ||||||||
1999 | 20.94 | 21.93 | 24.68 | 31.37 | 41.26 | 50.60 | 58.10 | 57.50 | u | 41.12 | d | 31.03 | 22.50 | 17.32 | 32.80 | a | ||||||||||
2000 | 15.90 | 20.76 | 26.65 | 30.67 | 42.48 | 48.63 | 57.87 | 56.19 | 45.03 | a | 34.65 | 14.17 | 10.23 | 33.60 | ||||||||||||
2001 | 14.42 | 14.43 | 24.19 | 34.24 | a | 42.42 | 51.20 | 60.42 | 55.94 | 46.27 | 32.48 | 22.37 | 13.97 | b | 34.36 | |||||||||||
2002 | 10.47 | a | 11.25 | 16.55 | 31.77 | 39.55 | 53.96 | b | 58.65 | 54.97 | 46.63 | 28.23 | 22.43 | 16.27 | a | 32.56 | ||||||||||
2003 | 18.26 | 13.85 | a | 25.87 | 36.00 | 43.29 | 46.33 | 53.73 | e | 57.67 | a | 42.00 | a | 33.19 | 20.43 | 13.19 | 33.65 | |||||||||
2004 | 13.23 | 14.14 | 26.32 | 32.28 | a | 42.87 | a | 48.80 | 54.19 | 50.34 | b | 44.53 | 35.26 | 21.47 | 15.00 | a | 33.20 | |||||||||
2005 | 17.90 | 17.93 | 23.23 | a | 31.67 | 40.68 | 50.25 | b | 55.55 | 52.68 | 42.86 | a | 31.42 | 23.29 | b | 10.73 | a | 33.18 | ||||||||
2006 | 14.74 | 7.86 | 18.61 | 28.56 | c | 39.03 | 52.03 | a | 56.79 | q | 52.07 | q | 40.11 | b | 30.10 | a | 18.03 | a | 9.03 | 25.81 | b | |||||
2007 | 0.52 | 13.71 | 25.90 | 28.67 | 41.53 | a | 50.18 | b | 60.63 | a | 58.45 | b | 45.33 | 32.80 | a | 16.72 | a | 3.59 | b | 31.50 | ||||||
2008 | 4.94 | 15.52 | 21.40 | a | 26.47 | 39.16 | 48.19 | i | 56.90 | 54.71 | 42.63 | 31.96 | e | 22.67 | 7.29 | 29.42 | a | |||||||||
2009 | 13.26 | 15.71 | 18.06 | 29.63 | 43.06 | 47.67 | 54.39 | 50.26 | 42.87 | 26.55 | 21.43 | 4.29 | 30.60 | |||||||||||||
2010 | 10.06 | 11.46 | 22.81 | 31.03 | 38.42 | 51.70 | 56.16 | 54.45 | 41.73 | 33.32 | 17.97 | 13.90 | 31.92 | |||||||||||||
2011 | 8.74 | 6.14 | 23.03 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 12.64 | i | |||
2012 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2013 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2014 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2015 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2016 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2017 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2018 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 53.38 | w | 49.97 | 45.74 | c | 30.41 | b | 17.23 | 10.45 | 30.76 | g | |||
2019 | 8.74 | 7.21 | 18.42 | 32.70 | 36.83 | a | 48.33 | 58.03 | 55.48 | 49.03 | 23.45 | 16.93 | 11.93 | a | 30.59 | |||||||||||
2020 | 17.23 | a | 10.24 | 24.74 | 28.15 | d | 41.97 | 50.83 | 57.00 | 55.32 | 41.10 | 24.73 | a | 21.33 | 12.58 | 32.10 | ||||||||||
2021 | 14.90 | 8.39 | 21.48 | 27.47 | 42.45 | 52.93 | 58.03 | 53.65 | 45.23 | 32.97 | 22.80 | 14.26 | 32.88 | |||||||||||||
2022 | 8.03 | 10.04 | 21.71 | 27.63 | 40.32 | 51.43 | 59.03 | 56.71 | 47.10 | 32.00 | 14.53 | 9.61 | 31.51 | |||||||||||||
2023 | 11.13 | 10.04 | 19.47 | a | 27.86 | i | 44.43 | h | 52.00 | a | 55.16 | 55.27 | e | 44.72 | a | 30.25 | c | 18.77 | 16.90 | 31.37 | b | |||||
2024 | 7.06 | 17.31 | 22.23 | 33.07 | 36.67 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 19.92 | h | ||||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 11.74 | 14.47 | 22.21 | 30.18 | 40.23 | 49.47 | 55.67 | 53.85 | 43.91 | 31.76 | 20.38 | 11.65 | 32.31 | |||||||||||||
S.D. | 4.55 | 4.44 | 3.50 | 2.81 | 2.62 | 2.39 | 2.29 | 2.39 | 2.76 | 3.13 | 2.71 | 4.24 | 1.20 | |||||||||||||
SKEW | -0.19 | -0.04 | -0.71 | 0.08 | -0.74 | -0.14 | 0.14 | -0.15 | 0.25 | -0.30 | -0.38 | -0.52 | 0.04 | |||||||||||||
MAX | 20.94 | 22.55 | 27.69 | 36.89 | 45.00 | 53.96 | 60.63 | 58.45 | 49.20 | 38.97 | 27.10 | 20.35 | 34.54 | |||||||||||||
MIN | 0.52 | 6.14 | 13.00 | 24.55 | 32.61 | 44.24 | 51.29 | 49.97 | 38.43 | 23.45 | 14.17 | 0.83 | 30.25 | |||||||||||||
YRS | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 45 | 47 | 45 | 45 | 44 | 33 |