YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 15.67 | 10.59 | d | 13.13 | j | |
1972 | 5.52 | b | 10.38 | 19.87 | 20.83 | 21.00 | 34.97 | 39.48 | 36.68 | 32.27 | 28.71 | 11.21 | a | 8.72 | b | 22.47 | ||||||||||
1973 | 7.87 | a | 11.18 | 11.35 | 14.53 | 27.19 | 34.70 | 39.16 | 37.13 | 30.17 | a | 24.60 | a | 19.47 | 13.74 | 22.59 | ||||||||||
1974 | 9.45 | 7.14 | 20.26 | 21.17 | 29.84 | 39.10 | 41.23 | 38.48 | 33.70 | 28.65 | 16.60 | 7.29 | 24.41 | |||||||||||||
1975 | 10.35 | 7.14 | 13.71 | 19.43 | 24.33 | m | 34.07 | 43.18 | c | 37.04 | d | 34.41 | c | 24.70 | d | 16.17 | g | 10.70 | a | 23.47 | b | |||||
1976 | 8.11 | d | 15.17 | e | 13.93 | b | 20.21 | k | 28.17 | g | 32.62 | d | 40.74 | l | 39.68 | f | 35.08 | e | 24.17 | a | 16.56 | c | 8.39 | 19.25 | d | |
1977 | 8.42 | 7.64 | 13.46 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 29.93 | d | 21.03 | a | 20.37 | a | 16.81 | f | ||
1978 | 13.53 | a | 11.96 | c | 19.61 | c | ----- | z | 29.59 | n | 39.47 | ----- | z | ----- | z | 34.58 | r | 29.13 | a | 20.14 | a | 10.03 | a | 20.55 | e | |
1979 | 5.18 | c | 7.78 | e | 13.90 | b | 22.48 | e | 28.58 | l | 34.17 | 40.84 | 38.19 | 36.37 | 26.87 | 15.30 | c | 13.90 | a | 23.18 | a | |||||
1980 | 16.19 | d | 14.15 | b | 14.44 | d | 16.45 | s | ----- | z | 35.67 | 40.80 | f | 37.52 | 33.57 | ----- | z | 17.06 | n | 14.15 | e | 23.67 | e | |||
1981 | 10.12 | f | 10.00 | e | 12.69 | e | 24.33 | o | ----- | z | 40.18 | s | 43.59 | i | 41.57 | j | 35.84 | k | 29.48 | j | 21.58 | d | 17.86 | i | 14.76 | i |
1982 | 13.37 | l | 12.19 | l | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1983 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1984 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1985 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1986 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1987 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1989 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1990 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1991 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1992 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1993 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1994 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1995 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1997 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1998 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1999 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2000 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2001 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2002 | ----- | z | -9.00 | w | 11.83 | y | 20.78 | u | ----- | z | 28.09 | s | 35.78 | v | 31.43 | x | 31.00 | t | 20.22 | v | 9.67 | x | -3.89 | v | ----- | z |
2003 | 3.94 | o | 8.76 | g | 3.43 | h | 16.08 | q | 22.09 | t | 26.85 | q | 35.10 | u | 34.30 | u | 22.86 | w | 19.71 | q | ----- | z | 4.47 | p | ----- | z |
2004 | 4.45 | k | 6.25 | u | 13.40 | u | 15.38 | v | 19.50 | y | ----- | z | ----- | z | 29.83 | y | 24.67 | x | 15.23 | r | 14.57 | w | -3.27 | p | ----- | z |
2005 | 4.20 | p | 9.17 | p | 2.73 | t | ----- | z | 17.00 | y | 24.57 | w | ----- | z | 31.00 | x | ----- | z | 17.80 | u | 13.67 | x | 7.87 | p | ----- | z |
2006 | 1.09 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 31.40 | y | 23.50 | y | 12.33 | x | 7.80 | k | ----- | z |
2007 | 6.24 | j | 10.67 | j | 19.76 | n | ----- | z | ----- | z | 34.67 | x | ----- | z | 42.86 | x | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2008 | 11.19 | j | 12.50 | i | 19.35 | k | ----- | z | 29.83 | y | 38.56 | u | 42.33 | y | ----- | z | 34.67 | u | ----- | z | 21.50 | v | 13.45 | t | ----- | z |
2009 | 12.38 | b | 16.04 | b | 20.27 | e | 26.20 | y | ----- | z | ----- | z | ----- | z | ----- | z | 35.00 | t | 27.65 | n | 19.27 | s | 11.07 | q | 16.23 | i |
2010 | 8.72 | m | 6.18 | f | 15.27 | t | 26.22 | u | 30.54 | e | 35.17 | 44.35 | 43.97 | 35.96 | f | 28.86 | c | 15.13 | 17.45 | 30.78 | e | |||||
2011 | 4.84 | 6.41 | a | 22.45 | b | 24.72 | a | 29.52 | b | 37.50 | j | 44.48 | h | 44.27 | i | 36.96 | b | 26.07 | d | 17.16 | e | 7.23 | 19.48 | c | ||
2012 | 12.48 | 11.26 | b | 17.29 | 26.55 | a | 30.81 | 35.88 | d | 44.82 | i | 43.31 | e | 35.22 | c | 31.60 | u | 16.74 | k | 14.87 | 25.30 | c | ||||
2013 | -0.39 | c | 5.11 | 18.53 | a | 24.87 | 30.23 | 37.27 | 44.26 | h | 43.24 | b | 36.76 | a | 22.61 | 20.83 | 11.83 | b | 22.81 | a | ||||||
2014 | 12.42 | e | 17.50 | 20.93 | b | 24.73 | 28.77 | 39.80 | 44.29 | 41.23 | a | 39.80 | 28.35 | 17.48 | a | 16.42 | 27.65 | |||||||||
2015 | 12.45 | 18.82 | 20.97 | 25.45 | a | 29.63 | d | 39.89 | b | 43.68 | 42.87 | a | 40.50 | 32.81 | 17.96 | d | 12.43 | c | 28.12 | |||||||
2016 | 7.58 | 12.56 | d | 22.13 | 23.15 | c | 30.16 | 39.69 | a | 44.06 | 40.61 | 36.67 | 31.39 | 23.00 | e | 16.60 | a | 27.30 | ||||||||
2017 | 14.71 | c | 18.92 | c | 20.13 | 24.87 | 30.27 | a | 38.60 | 44.71 | 41.37 | a | 41.00 | i | 23.00 | x | 29.36 | b | 14.07 | b | 27.70 | b | ||||
2018 | 10.72 | b | 16.20 | c | 19.48 | h | 26.50 | j | 30.55 | b | 38.92 | e | 45.94 | 42.52 | 36.73 | 27.55 | 17.90 | 11.86 | c | 27.89 | b | |||||
2019 | 8.41 | b | 13.44 | c | 20.23 | 23.53 | 28.65 | 33.72 | a | 42.17 | a | 42.03 | 39.13 | 23.47 | a | 18.70 | 13.52 | 25.58 | ||||||||
2020 | 10.39 | 10.38 | 21.64 | t | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 9.26 | h | 10.38 | j | ||
2021 | 11.29 | 13.82 | 14.33 | p | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.87 | a | 14.66 | i | ||
2022 | 7.45 | 2.81 | b | 12.88 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.58 | 8.28 | i | ||
2023 | 6.35 | 8.14 | 17.74 | 22.07 | 31.61 | 37.93 | 44.58 | 44.71 | 37.69 | a | 27.45 | 20.43 | 12.74 | 25.95 | ||||||||||||
2024 | 11.42 | 14.60 | d | 19.67 | d | 19.17 | g | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 15.23 | i | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 9.46 | 11.54 | 17.79 | 22.74 | 29.20 | 36.76 | 42.90 | 40.68 | 35.94 | 27.37 | 18.71 | 13.06 | 25.51 | |||||||||||||
S.D. | 3.68 | 4.34 | 3.46 | 3.10 | 2.60 | 2.45 | 2.13 | 2.76 | 2.74 | 2.82 | 3.80 | 3.51 | 2.20 | |||||||||||||
SKEW | -0.55 | -0.05 | -0.46 | -1.32 | -2.43 | -0.09 | -0.53 | -0.20 | -0.26 | 0.04 | 0.81 | 0.14 | -0.30 | |||||||||||||
MAX | 16.19 | 18.92 | 22.45 | 26.55 | 31.61 | 39.89 | 45.94 | 44.71 | 40.50 | 32.81 | 29.36 | 20.37 | 28.12 | |||||||||||||
MIN | -0.39 | 2.81 | 11.35 | 14.53 | 21.00 | 32.62 | 39.16 | 36.68 | 30.17 | 22.61 | 11.21 | 7.23 | 22.47 | |||||||||||||
YRS | 24 | 25 | 21 | 14 | 14 | 18 | 13 | 16 | 16 | 17 | 19 | 23 | 8 |