YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1980 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1981 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.57 | b | 54.48 | f | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 50.57 | k |
1982 | ----- | z | ----- | z | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2003 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2004 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2005 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
2006 | ----- | z | ----- | z | ----- | z | 28.33 | u | 37.55 | k | 46.37 | 55.68 | 50.10 | 37.93 | a | 32.87 | 19.31 | a | 10.65 | 36.13 | e | |||||
2007 | 4.39 | 16.79 | 22.81 | 30.57 | 37.35 | 42.63 | 54.94 | 51.58 | 39.70 | 28.16 | 15.40 | 3.07 | a | 28.95 | ||||||||||||
2008 | -2.23 | 6.90 | 19.23 | 23.79 | a | 34.61 | 41.70 | 52.61 | 49.52 | 40.73 | 28.33 | a | 21.70 | 6.42 | 26.94 | |||||||||||
2009 | 7.48 | 18.82 | 19.04 | d | 27.04 | c | 40.27 | a | 45.21 | a | 52.70 | a | 48.54 | g | 42.83 | 28.65 | 15.37 | -0.65 | h | 29.74 | b | |||||
2010 | 8.60 | k | 9.89 | 23.46 | c | 29.57 | 34.43 | a | 45.50 | 51.84 | 49.03 | 36.73 | 34.39 | 18.33 | 20.58 | 32.16 | a | |||||||||
2011 | 6.68 | 13.68 | 24.93 | b | 28.17 | a | 35.19 | 42.27 | 54.19 | 51.58 | 42.23 | 30.29 | 16.37 | 7.19 | 29.40 | |||||||||||
2012 | 6.60 | f | 18.36 | a | 23.55 | 29.67 | 36.17 | a | 45.03 | 54.68 | 53.07 | a | 41.10 | 28.74 | 16.47 | 7.32 | 32.20 | a | ||||||||
2013 | -6.06 | 13.00 | 24.20 | k | 28.83 | 37.94 | 43.57 | 55.84 | 51.74 | 47.07 | 27.48 | 21.07 | 7.00 | 29.77 | a | |||||||||||
2014 | 11.42 | 15.46 | 20.97 | 28.55 | a | 35.48 | 42.33 | 55.06 | 50.03 | a | 44.83 | 32.45 | 17.17 | 18.61 | 31.03 | |||||||||||
2015 | 16.42 | 18.71 | 24.77 | 26.47 | 39.39 | 48.43 | 50.16 | 51.81 | 41.30 | 38.06 | 19.13 | 8.10 | 31.90 | |||||||||||||
2016 | 5.77 | 15.66 | 22.35 | 31.97 | 37.42 | 48.17 | 50.81 | 48.87 | 42.47 | 35.81 | 23.27 | 10.90 | b | 31.12 | ||||||||||||
2017 | 6.39 | 20.21 | 27.65 | 28.60 | 37.13 | 46.40 | 54.23 | 50.48 | 41.57 | 24.42 | 18.37 | 7.26 | 30.22 | |||||||||||||
2018 | 10.39 | 13.46 | 20.39 | 22.80 | y | ----- | z | ----- | z | 56.45 | 50.75 | c | 41.00 | a | 34.39 | 14.50 | 10.33 | a | 27.96 | c | ||||||
2019 | 7.13 | 3.32 | c | 25.10 | 31.27 | 33.60 | a | 42.00 | 47.86 | b | 46.96 | e | 38.97 | 17.10 | 14.90 | 15.03 | 26.94 | |||||||||
2020 | 3.03 | 13.11 | a | 23.06 | 22.70 | 37.23 | 43.53 | 47.26 | 47.71 | 36.63 | 23.68 | 12.37 | 2.61 | 26.08 | ||||||||||||
2021 | 9.16 | 18.04 | 22.16 | 28.43 | 39.55 | 49.47 | 58.23 | 50.20 | a | 42.07 | 32.84 | 20.87 | 12.81 | 31.98 | ||||||||||||
2022 | 9.45 | 11.11 | 23.52 | 27.87 | 34.52 | 47.40 | 54.35 | 54.32 | 46.33 | 30.84 | 15.13 | 11.77 | 30.55 | |||||||||||||
2023 | 12.94 | 5.46 | 20.74 | 26.93 | 40.74 | 44.97 | 54.84 | 55.33 | a | 40.73 | 28.71 | 17.40 | 12.55 | 30.11 | ||||||||||||
2024 | 15.73 | a | 20.31 | 25.06 | 22.73 | s | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 20.37 | i | ||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 7.38 | 14.02 | 22.87 | 28.15 | 36.94 | 45.31 | 53.43 | 50.77 | 41.35 | 29.84 | 17.62 | 10.13 | 29.60 | |||||||||||||
S.D. | 5.89 | 5.07 | 2.30 | 2.44 | 2.23 | 2.71 | 2.91 | 2.17 | 2.86 | 4.94 | 2.88 | 4.88 | 2.00 | |||||||||||||
SKEW | -0.62 | -0.66 | 0.05 | -0.69 | 0.23 | 0.35 | -0.71 | 0.35 | 0.25 | -0.73 | 0.24 | 0.54 | -0.58 | |||||||||||||
MAX | 16.42 | 20.31 | 27.65 | 31.97 | 40.74 | 50.57 | 58.23 | 55.33 | 47.07 | 38.06 | 23.27 | 20.58 | 31.98 | |||||||||||||
MIN | -6.06 | 3.32 | 19.04 | 22.70 | 33.60 | 41.70 | 47.26 | 46.96 | 36.63 | 17.10 | 12.37 | 2.61 | 26.08 | |||||||||||||
YRS | 16 | 18 | 17 | 16 | 16 | 18 | 18 | 17 | 18 | 18 | 18 | 17 | 12 |