YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1988 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.40 | e | 51.73 | a | 46.81 | 36.97 | 32.71 | 21.87 | 8.76 | b | 35.61 | e | ||||
1989 | 1.97 | b | 10.63 | a | 26.26 | 32.67 | 36.74 | 42.60 | 51.07 | a | 47.65 | 40.10 | 29.29 | 19.23 | 10.97 | 29.10 | ||||||||||
1990 | 10.94 | 10.88 | c | 25.48 | 31.86 | a | 34.73 | a | 44.71 | b | 53.40 | a | 48.42 | 45.28 | a | 28.17 | b | 19.14 | a | 0.55 | b | 29.46 | ||||
1991 | 6.03 | 15.79 | 21.30 | a | 26.00 | a | 33.71 | 41.93 | 50.65 | 50.77 | a | 40.79 | a | 29.42 | 21.90 | a | 13.00 | a | 29.27 | |||||||
1992 | 10.86 | b | 19.45 | 27.03 | a | 32.75 | b | 39.00 | a | 43.60 | 49.52 | b | 48.10 | 39.40 | 31.97 | a | 16.90 | a | 7.48 | 30.50 | ||||||
1993 | 11.89 | c | 17.07 | a | 24.00 | b | 27.50 | 36.37 | a | 41.41 | a | 48.35 | 46.45 | 35.10 | 28.24 | b | 13.88 | e | 8.03 | a | 28.19 | |||||
1994 | 10.92 | e | 10.14 | 24.27 | a | 29.67 | 38.86 | c | 47.03 | 51.74 | 51.32 | 41.76 | a | 29.41 | b | 14.53 | 15.20 | a | 30.41 | |||||||
1995 | 17.59 | b | 21.44 | c | 24.40 | a | 25.22 | c | 32.86 | b | 37.00 | a | 45.20 | a | 49.58 | 37.57 | 24.19 | d | 20.30 | g | 16.70 | d | 30.16 | a | ||
1996 | 12.59 | i | 15.89 | b | 19.86 | b | 23.34 | a | 34.60 | a | 42.11 | c | 51.19 | 46.81 | 35.83 | a | 24.80 | a | 21.72 | a | 14.77 | a | 30.08 | a | ||
1997 | 11.90 | 13.65 | b | 20.10 | b | 24.68 | b | 34.24 | b | 42.06 | l | 47.68 | l | 51.00 | 43.29 | b | ----- | z | ----- | z | 10.38 | b | 26.16 | d | ||
1998 | 15.93 | c | 21.39 | e | 22.65 | 27.96 | b | 34.52 | 41.76 | a | 52.06 | 50.39 | 44.00 | a | 29.87 | a | 26.46 | d | 10.79 | c | 31.48 | |||||
1999 | 19.89 | c | 18.14 | f | 23.48 | b | 26.29 | b | 35.14 | c | 42.07 | 52.14 | b | 50.77 | a | 38.03 | a | ----- | z | 19.84 | k | 12.97 | b | 33.42 | c | |
2000 | 17.04 | d | 22.81 | b | 23.60 | a | 29.11 | b | 38.31 | b | 43.17 | a | 51.60 | a | 53.76 | b | 41.79 | b | 32.13 | 14.96 | c | 16.79 | c | 32.09 | ||
2001 | 12.53 | a | 19.89 | 27.94 | 30.11 | b | 39.10 | 45.72 | a | 49.45 | 51.21 | c | 41.55 | a | 31.87 | 23.07 | a | 12.10 | a | 32.05 | ||||||
2002 | 11.27 | e | 12.33 | a | 17.43 | a | 31.96 | b | 32.97 | 46.52 | a | 53.83 | b | 48.07 | c | 39.67 | 28.03 | a | 19.71 | b | 13.07 | b | 29.57 | |||
2003 | 19.04 | f | 18.31 | b | 25.70 | a | 29.64 | b | 38.14 | b | 43.10 | 55.13 | 53.28 | b | 42.77 | ----- | z | 20.72 | a | 15.81 | e | 34.26 | b | |||
2004 | 8.23 | a | 12.66 | 26.23 | 31.27 | 35.77 | 43.63 | 49.43 | a | 46.75 | c | 36.41 | a | 30.32 | 23.41 | a | 15.35 | 29.96 | ||||||||
2005 | 15.47 | a | 20.37 | a | 24.24 | b | 27.40 | j | 34.60 | f | 36.25 | f | 52.83 | a | 45.70 | a | 35.79 | a | 30.25 | c | 24.31 | d | 13.57 | a | 29.17 | c |
2006 | 15.04 | f | 12.21 | d | 19.33 | a | 29.66 | a | 36.21 | b | 44.56 | e | 53.59 | b | 49.11 | c | 37.00 | a | 30.47 | a | 21.38 | f | 7.54 | g | 34.68 | c |
2007 | 2.81 | e | 18.85 | b | 23.40 | a | 29.50 | h | 36.00 | d | 41.91 | g | 53.56 | f | 51.05 | i | 39.83 | g | 25.70 | h | 20.40 | e | 11.54 | g | 20.29 | g |
2008 | 8.76 | j | 15.59 | g | 19.56 | f | 22.27 | d | 32.40 | f | 41.54 | f | 51.30 | d | 50.92 | g | 38.04 | d | 26.80 | a | 23.30 | 9.04 | f | 32.34 | g | |
2009 | 14.58 | g | 17.19 | a | 20.19 | d | 28.27 | 38.74 | 42.93 | 51.00 | 46.55 | 43.75 | j | 28.33 | d | 17.97 | 5.48 | 29.66 | b | |||||||
2010 | 13.29 | 18.40 | h | 23.04 | d | 27.77 | 33.90 | 44.07 | a | 52.65 | 47.29 | 38.24 | a | 33.24 | b | 17.03 | 20.52 | 31.91 | a | |||||||
2011 | 10.52 | 13.32 | 24.13 | 27.63 | 32.90 | 40.19 | d | 50.48 | 48.81 | 40.37 | 29.43 | a | 18.60 | 8.42 | 28.73 | |||||||||||
2012 | 13.71 | 16.14 | 22.61 | 28.73 | 35.90 | a | 43.65 | d | 51.37 | a | 51.50 | a | 40.13 | 29.58 | 22.00 | 15.32 | 30.89 | |||||||||
2013 | 3.19 | 10.57 | 22.84 | 25.47 | 34.00 | 44.40 | 52.77 | a | 50.19 | 42.87 | 26.29 | 20.96 | b | 7.55 | 28.43 | |||||||||||
2014 | 14.06 | 21.68 | 20.94 | 27.66 | a | 35.23 | 44.17 | 53.74 | 47.29 | 43.57 | 30.32 | 19.57 | b | 17.71 | 31.33 | |||||||||||
2015 | 18.32 | 22.04 | a | 23.42 | 27.13 | 36.74 | 45.40 | 49.58 | 49.90 | a | 42.87 | 35.39 | 17.59 | a | 10.35 | 31.56 | ||||||||||
2016 | 12.55 | 15.34 | 25.13 | 28.90 | a | 34.77 | 46.50 | 51.65 | 47.26 | 39.17 | 32.97 | 20.47 | 11.65 | 30.53 | ||||||||||||
2017 | 14.81 | 22.54 | 24.16 | 26.47 | 33.52 | 45.70 | 53.58 | 49.13 | 39.67 | 24.77 | 22.87 | 10.35 | 30.63 | |||||||||||||
2018 | 15.48 | 13.93 | 19.30 | d | 28.33 | 36.84 | 45.83 | 54.06 | 50.35 | 40.63 | 30.19 | 14.86 | a | 12.87 | 30.22 | |||||||||||
2019 | 11.48 | 11.79 | 23.77 | a | 31.03 | 32.10 | 42.13 | 49.68 | 49.32 | 40.87 | 19.06 | 18.83 | 16.58 | 28.89 | ||||||||||||
2020 | 15.42 | 14.45 | 24.13 | 26.47 | 35.68 | 43.33 | 48.71 | 50.58 | 38.13 | 27.00 | 17.53 | 7.03 | 29.04 | |||||||||||||
2021 | 11.61 | 16.18 | 19.48 | 26.63 | 35.26 | 47.83 | 54.16 | 47.97 | 40.60 | 28.00 | 21.90 | 15.42 | 30.42 | |||||||||||||
2022 | 10.52 | 9.61 | 21.52 | 25.30 | 34.00 | 45.70 | 54.35 | 52.03 | 42.97 | 29.19 | 15.33 | 13.03 | 29.46 | |||||||||||||
2023 | 16.00 | 8.29 | 19.42 | 24.33 | 36.48 | 41.50 | 51.32 | 50.06 | 40.47 | 28.32 | 21.00 | 14.58 | 29.31 | |||||||||||||
2024 | 14.39 | 19.72 | 21.79 | c | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.63 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 12.28 | 15.96 | 22.93 | 27.94 | 35.56 | 43.90 | 51.57 | 49.24 | 40.05 | 29.06 | 19.75 | 12.22 | 30.06 | |||||||||||||
S.D. | 4.35 | 4.29 | 2.49 | 2.65 | 1.94 | 2.50 | 2.08 | 2.04 | 2.60 | 3.13 | 3.11 | 4.10 | 1.12 | |||||||||||||
SKEW | -0.77 | 0.01 | -0.20 | 0.00 | 0.31 | -0.03 | -0.72 | 0.24 | -0.07 | -0.86 | -0.13 | -0.56 | 0.22 | |||||||||||||
MAX | 19.89 | 22.81 | 27.94 | 32.75 | 39.10 | 50.40 | 55.13 | 53.76 | 45.28 | 35.39 | 26.46 | 20.52 | 32.09 | |||||||||||||
MIN | 1.97 | 8.29 | 17.43 | 22.27 | 32.10 | 37.00 | 45.20 | 45.70 | 35.10 | 19.06 | 13.88 | 0.55 | 28.19 | |||||||||||||
YRS | 31 | 33 | 35 | 33 | 33 | 32 | 34 | 34 | 34 | 32 | 32 | 33 | 24 |