YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1978 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 12.29 | 12.29 | k | |
1979 | 6.87 | 13.50 | 23.23 | ----- | z | ----- | z | 44.43 | 50.94 | 48.74 | 42.60 | 32.74 | 18.13 | 15.06 | 29.62 | b | ||||||||||
1980 | 16.33 | a | 18.86 | 18.84 | 26.93 | a | 39.35 | 46.37 | 53.00 | 51.84 | 44.72 | a | 29.10 | 21.43 | 22.13 | 32.41 | ||||||||||
1981 | 15.26 | 12.56 | a | 24.65 | 30.83 | 36.63 | a | 47.73 | 51.90 | 49.45 | 44.27 | 33.84 | 26.63 | 17.10 | 32.57 | |||||||||||
1982 | 13.58 | 13.68 | 22.23 | 29.50 | 37.38 | b | 44.43 | 50.00 | 52.16 | 43.93 | 30.48 | 21.20 | 17.10 | a | 31.31 | |||||||||||
1983 | 16.90 | 20.61 | 24.00 | 25.37 | 36.32 | 42.20 | 50.68 | 51.29 | 45.00 | 33.87 | 20.90 | 8.57 | c | 31.31 | ||||||||||||
1984 | 8.65 | 14.55 | 19.55 | 26.21 | b | 40.48 | 46.73 | 51.84 | 52.52 | 42.03 | 30.87 | a | 21.83 | 15.65 | 30.91 | |||||||||||
1985 | 12.42 | 15.00 | 24.30 | a | 30.50 | 40.03 | 46.03 | 50.74 | 49.68 | 41.66 | a | 34.68 | 23.43 | 11.48 | 31.66 | |||||||||||
1986 | 17.35 | 19.86 | 25.03 | 32.37 | 37.13 | a | 47.97 | 50.39 | 50.10 | 41.83 | 30.97 | a | 20.87 | 16.29 | 32.51 | |||||||||||
1987 | 13.20 | a | 19.54 | 20.84 | 27.87 | 38.94 | 47.80 | 48.84 | 50.03 | 40.97 | 32.32 | 21.23 | 13.83 | a | 31.28 | |||||||||||
1988 | 8.26 | 16.03 | 17.81 | 28.23 | 37.74 | 48.30 | 50.16 | 51.39 | 41.93 | 33.29 | 21.30 | 11.52 | 30.50 | |||||||||||||
1989 | 12.35 | 15.33 | a | 25.90 | 30.90 | 40.87 | 46.80 | 51.39 | 50.32 | 43.03 | 29.86 | b | 18.47 | 10.90 | 31.34 | |||||||||||
1990 | 11.19 | 15.61 | 25.55 | 31.97 | 36.71 | 46.13 | 50.52 | 48.10 | 45.67 | 30.58 | 21.93 | 9.17 | a | 31.09 | ||||||||||||
1991 | 13.39 | 15.89 | 22.23 | 28.59 | a | 38.74 | 46.38 | a | 50.77 | 50.65 | 43.57 | 30.47 | a | 19.00 | a | 16.39 | 31.34 | |||||||||
1992 | 15.03 | 18.86 | 22.81 | 32.10 | 39.90 | 44.30 | 49.84 | 48.65 | 40.80 | 32.23 | a | 18.53 | 11.85 | k | 33.00 | a | ||||||||||
1993 | 16.26 | 17.63 | a | 24.10 | 31.10 | 38.32 | 46.43 | 50.81 | 50.97 | 39.63 | 28.17 | b | 17.00 | a | 12.39 | 31.07 | ||||||||||
1994 | 13.37 | a | 14.86 | 23.97 | 30.23 | 42.16 | 47.33 | 49.58 | 52.23 | 42.23 | 32.39 | 22.63 | 17.23 | 32.35 | ||||||||||||
1995 | 16.45 | 20.39 | 23.37 | a | 26.83 | 37.00 | a | 44.80 | 48.17 | a | 51.10 | 43.53 | 29.16 | 23.00 | a | 16.71 | 31.71 | |||||||||
1996 | 13.23 | a | 17.89 | a | 18.67 | a | 29.57 | 42.61 | 48.83 | 52.48 | 50.94 | 41.43 | 30.77 | 22.53 | 14.13 | 31.92 | ||||||||||
1997 | 11.19 | 17.36 | 21.84 | 27.90 | a | 38.74 | 46.73 | 50.45 | 51.87 | a | 47.40 | 32.32 | 20.03 | 16.43 | a | 31.86 | ||||||||||
1998 | 15.71 | 20.96 | 21.84 | 27.24 | a | 38.29 | 44.80 | 53.61 | 49.27 | e | 44.28 | a | 34.06 | 25.93 | 15.03 | 32.59 | ||||||||||
1999 | 19.32 | 17.86 | 24.03 | 29.53 | 38.48 | 45.33 | 53.39 | 51.00 | 42.80 | 29.94 | 22.73 | 14.17 | a | 32.38 | ||||||||||||
2000 | 16.50 | a | 19.41 | 24.97 | 31.10 | 39.68 | 48.30 | 51.26 | 50.84 | 40.59 | h | 33.23 | a | 17.76 | a | 13.58 | e | 31.51 | a | |||||||
2001 | 11.16 | 16.48 | c | 25.71 | 30.97 | a | 38.64 | i | 46.36 | b | 53.39 | 49.23 | a | 43.03 | 32.16 | 24.86 | a | 12.77 | 31.47 | a | ||||||
2002 | 12.94 | 12.82 | 18.33 | a | 32.13 | 37.84 | 50.03 | 52.29 | 50.68 | 44.47 | 31.90 | 22.13 | 14.94 | 31.71 | ||||||||||||
2003 | 18.90 | a | 17.48 | a | 21.60 | k | 30.35 | g | 39.29 | 44.70 | j | 51.81 | 50.81 | 41.50 | 33.65 | 21.52 | a | 14.42 | 32.15 | c | ||||||
2004 | 14.65 | 15.12 | d | 25.90 | 30.70 | 37.74 | 45.77 | 49.58 | 47.17 | g | 41.73 | 32.23 | 23.79 | a | 14.38 | b | 30.14 | a | ||||||||
2005 | 19.43 | a | 20.64 | 21.41 | b | 26.82 | h | 39.16 | 42.80 | 48.77 | 49.19 | 43.83 | 33.79 | b | 20.60 | 12.65 | 32.03 | a | ||||||||
2006 | 14.68 | ----- | z | 20.60 | a | 30.63 | 40.31 | b | 47.53 | 52.97 | 52.17 | a | 38.83 | 32.32 | 21.34 | a | 14.58 | 33.27 | a | |||||||
2007 | 10.33 | a | 17.25 | 23.81 | 29.24 | a | ----- | z | 44.40 | 49.38 | g | 51.62 | b | 43.96 | g | 29.15 | k | 20.32 | h | 13.83 | h | 29.44 | f | |||
2008 | 7.35 | h | 15.58 | e | 20.08 | f | 23.36 | h | 33.75 | g | 42.69 | d | 50.76 | b | 49.85 | e | 41.38 | d | 32.48 | f | 20.67 | f | 15.74 | d | 36.00 | f |
2009 | 13.78 | d | 16.65 | e | 22.93 | d | 27.87 | g | 38.68 | 44.90 | 51.32 | 46.68 | ----- | z | ----- | z | 21.57 | ----- | z | 32.06 | d | |||||
2010 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.39 | 18.39 | k | |
2011 | 11.82 | i | 8.93 | m | 24.53 | p | 29.15 | q | 36.28 | m | 47.14 | i | 52.88 | e | 53.86 | c | 43.36 | h | 31.44 | o | 21.43 | g | 14.83 | s | 53.37 | j |
2012 | 16.33 | s | 16.07 | b | 24.48 | 31.08 | q | ----- | z | 49.13 | 52.74 | 50.39 | 41.53 | 29.61 | ----- | z | ----- | z | 37.71 | e | ||||||
2013 | 7.94 | 14.07 | 19.55 | 25.90 | 36.71 | 49.13 | 53.23 | 49.42 | 45.93 | 29.16 | 19.30 | 12.32 | 30.22 | |||||||||||||
2014 | 12.74 | 16.18 | 22.55 | 29.07 | 34.77 | 45.83 | 52.55 | 48.16 | 47.30 | 34.68 | 29.37 | c | 14.80 | a | 32.33 | |||||||||||
2015 | 17.23 | 16.54 | 25.10 | 29.70 | 38.52 | 45.03 | 52.13 | 50.71 | 46.20 | 37.52 | 19.93 | 17.00 | f | 34.42 | a | |||||||||||
2016 | 10.94 | n | 20.54 | e | 22.26 | d | 27.36 | p | 34.90 | ----- | z | 50.13 | 50.79 | g | 55.00 | w | 32.97 | 23.57 | 12.77 | 28.16 | e | |||||
2017 | 14.97 | 20.79 | 22.58 | l | ----- | z | ----- | z | ----- | z | ----- | z | 50.93 | p | 44.00 | 32.07 | b | 25.57 | 15.10 | 25.41 | f | |||||
2018 | 13.52 | 15.86 | 21.30 | h | 28.77 | 40.84 | 47.47 | 51.16 | 49.10 | 43.83 | a | 36.60 | p | 19.43 | 13.65 | 32.36 | b | |||||||||
2019 | 15.45 | 12.89 | s | 23.13 | 28.00 | k | 33.81 | 44.68 | k | 48.17 | m | ----- | z | ----- | z | 17.31 | r | 19.03 | 15.13 | 21.31 | g | |||||
2020 | 15.23 | ----- | z | 23.87 | 27.07 | ----- | z | ----- | z | ----- | z | 49.16 | 38.53 | 28.81 | 22.73 | 14.58 | 27.50 | d | ||||||||
2021 | 13.97 | 13.68 | 20.55 | 25.76 | a | 39.35 | 46.77 | d | ----- | z | ----- | z | 42.55 | j | 30.97 | ----- | z | ----- | z | 27.29 | e | |||||
2022 | 10.00 | u | 10.00 | 18.73 | a | 32.82 | s | 38.71 | q | ----- | z | 52.33 | y | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 14.37 | j | |
2023 | 14.03 | 14.00 | u | ----- | z | 22.00 | u | ----- | z | ----- | z | 51.87 | 51.62 | e | 43.50 | 31.97 | a | 22.80 | 17.48 | 33.32 | e | |||||
2024 | 13.77 | 20.15 | p | 23.39 | 25.62 | v | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.58 | j | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 13.94 | 16.72 | 22.62 | 29.21 | 38.45 | 46.28 | 51.27 | 50.41 | 43.03 | 31.87 | 21.69 | 14.50 | 31.65 | |||||||||||||
S.D. | 2.96 | 2.65 | 2.30 | 2.04 | 1.97 | 1.87 | 1.40 | 1.44 | 2.10 | 1.99 | 2.60 | 2.56 | 0.68 | |||||||||||||
SKEW | -0.40 | -0.16 | -0.53 | -0.28 | -0.21 | -0.20 | -0.17 | -0.17 | 0.04 | 0.33 | 0.66 | 0.18 | -0.27 | |||||||||||||
MAX | 19.43 | 20.96 | 25.90 | 32.37 | 42.61 | 50.03 | 53.61 | 53.86 | 47.40 | 37.52 | 29.37 | 22.13 | 32.59 | |||||||||||||
MIN | 6.87 | 10.00 | 17.81 | 25.37 | 33.81 | 42.20 | 48.17 | 46.68 | 38.53 | 28.17 | 17.00 | 8.57 | 30.22 | |||||||||||||
YRS | 40 | 39 | 39 | 32 | 34 | 36 | 38 | 38 | 36 | 37 | 38 | 38 | 22 |