YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1973 | ----- | z | ----- | z | ----- | z | ----- | z | 43.58 | ----- | z | 60.10 | 61.03 | 49.07 | 42.90 | 25.07 | 8.29 | 41.43 | e | |||||||
1974 | 2.68 | 10.75 | 22.06 | 36.17 | 43.42 | 53.37 | 63.45 | 55.23 | 43.77 | 38.74 | 24.87 | 15.03 | 34.13 | |||||||||||||
1975 | 6.03 | 4.68 | 13.74 | 31.20 | 47.29 | 55.80 | 61.84 | 59.52 | 45.67 | 37.74 | 25.20 | 11.87 | 33.38 | |||||||||||||
1976 | 1.90 | 18.62 | 22.29 | 37.80 | 42.29 | 54.93 | a | 60.13 | 58.32 | 47.30 | 31.19 | 16.77 | 3.48 | 32.92 | ||||||||||||
1977 | -7.61 | 14.21 | 26.48 | 39.23 | 53.55 | 56.50 | 61.74 | 53.65 | 50.43 | 37.13 | 22.31 | a | 7.26 | 34.57 | ||||||||||||
1978 | -5.65 | 0.04 | 20.77 | 34.93 | 47.00 | 56.03 | 59.74 | 58.65 | 54.67 | 37.58 | 21.37 | 5.65 | 32.56 | |||||||||||||
1979 | -8.16 | -3.82 | 17.87 | 31.53 | 41.94 | 55.10 | 60.39 | 58.00 | 50.60 | 36.13 | 22.17 | 17.33 | a | 31.59 | ||||||||||||
1980 | ----- | z | 8.14 | 18.90 | a | 35.90 | 47.03 | 56.77 | 61.00 | 59.16 | 49.90 | 34.68 | 26.63 | 10.55 | 37.15 | a | ||||||||||
1981 | 9.03 | 13.32 | 25.06 | 39.00 | 44.55 | 55.90 | 61.52 | 59.17 | a | 48.70 | 37.94 | 28.70 | 7.48 | 35.86 | ||||||||||||
1982 | -9.39 | 8.79 | 22.10 | 30.40 | 50.26 | 51.17 | 62.26 | 58.96 | c | 50.33 | 39.29 | 20.90 | a | 16.52 | 33.46 | |||||||||||
1983 | 10.43 | a | 18.32 | 23.97 | a | 31.47 | 43.00 | 56.17 | 65.30 | a | 64.71 | 50.90 | 39.42 | 27.63 | -6.68 | 35.39 | ||||||||||
1984 | 6.19 | 20.41 | 13.77 | 36.67 | 46.42 | 58.66 | a | 60.97 | 62.39 | 44.87 | 40.58 | 25.50 | 8.97 | 35.45 | ||||||||||||
1985 | 1.16 | 7.71 | 27.10 | a | 39.37 | 51.54 | c | 53.13 | 59.03 | 56.19 | 50.23 | 36.19 | 13.63 | -1.81 | 32.79 | |||||||||||
1986 | 11.23 | 7.36 | 25.87 | 37.00 | 48.74 | 58.63 | 63.07 | a | 56.23 | 50.62 | a | 39.77 | 18.20 | 15.83 | b | 36.05 | ||||||||||
1987 | 14.37 | a | 21.57 | 27.65 | 38.31 | a | 52.74 | 59.27 | 64.03 | 57.16 | 50.27 | 32.00 | 29.60 | 17.55 | 38.71 | |||||||||||
1988 | -1.90 | 2.34 | 24.06 | 32.33 | 51.97 | a | 61.07 | 62.77 | 61.84 | 51.47 | 32.87 | 23.07 | a | 11.84 | 34.48 | |||||||||||
1989 | 14.74 | -1.00 | 16.90 | b | 34.27 | 45.33 | a | 55.30 | 63.77 | 59.61 | 48.89 | b | 36.71 | j | 18.63 | 1.84 | 32.57 | a | ||||||||
1990 | 17.90 | 11.63 | a | 25.32 | 33.70 | 44.84 | 57.69 | a | 58.83 | h | 60.38 | g | 52.23 | 35.10 | 26.20 | 5.35 | 31.00 | b | ||||||||
1991 | 2.93 | a | 18.64 | 23.45 | 37.53 | 52.13 | a | 62.73 | 61.10 | 58.93 | a | 46.34 | a | 32.06 | 15.14 | a | 15.07 | a | 35.51 | |||||||
1992 | 13.39 | 18.39 | a | 23.65 | 29.21 | a | 44.19 | 50.96 | e | 53.67 | a | 52.33 | a | 45.03 | 34.90 | 23.33 | 7.94 | 33.08 | ||||||||
1993 | 1.69 | b | 5.89 | a | 16.03 | 30.21 | b | 42.19 | 50.79 | b | 59.26 | 58.87 | a | 43.34 | a | 34.06 | 17.20 | 11.03 | 30.88 | |||||||
1994 | -5.07 | c | 0.92 | b | 23.83 | a | 30.13 | 46.68 | 56.97 | a | 54.80 | a | 53.23 | 50.30 | 38.67 | a | 25.87 | 14.77 | 32.59 | |||||||
1995 | 8.14 | b | 8.32 | c | 23.79 | b | 29.60 | 42.44 | d | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 22.46 | g | |
1996 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 57.06 | 57.29 | 47.57 | 35.67 | a | 13.38 | d | 3.40 | a | 35.73 | f | |||
1997 | -2.31 | b | 8.75 | 18.53 | a | 29.67 | 40.84 | 56.83 | a | 62.41 | b | 55.80 | a | 48.10 | a | 36.48 | 19.63 | 18.87 | 32.80 | |||||||
1998 | 9.26 | 24.32 | 19.90 | 35.30 | 50.63 | a | 53.87 | 60.23 | 59.87 | 50.27 | d | 39.81 | 26.43 | 14.19 | 37.01 | |||||||||||
1999 | 2.97 | 18.43 | 22.65 | 34.76 | a | 48.03 | a | 56.77 | 64.48 | d | 57.48 | 45.73 | 33.03 | a | 28.83 | a | 12.55 | 35.48 | ||||||||
2000 | 3.77 | a | 17.90 | 26.84 | 32.14 | a | 48.17 | a | 54.53 | 59.90 | a | 58.73 | a | 45.55 | a | 39.03 | a | 18.17 | a | -4.35 | 33.36 | |||||
2001 | 9.13 | -1.07 | a | 15.30 | a | 35.27 | 48.17 | b | 55.90 | a | 63.00 | 59.29 | 47.55 | a | 33.83 | b | 33.20 | 17.17 | a | 34.73 | ||||||
2002 | 12.81 | 15.60 | c | 9.79 | b | 33.14 | b | 41.00 | b | ----- | z | 63.77 | 58.81 | 50.07 | a | 30.68 | 22.37 | 15.90 | 32.18 | a | ||||||
2003 | 4.65 | 4.25 | 17.83 | a | 32.90 | a | 44.35 | 54.93 | 60.08 | e | 58.77 | 46.53 | 36.84 | 21.00 | 16.19 | 33.19 | ||||||||||
2004 | 1.27 | a | 8.96 | a | 25.53 | a | 31.57 | 43.74 | 53.24 | a | 58.66 | b | 53.03 | 54.17 | 38.13 | 27.34 | a | 13.74 | 34.12 | |||||||
2005 | 6.82 | c | 17.00 | a | 18.97 | 38.03 | a | 45.13 | 60.20 | 62.72 | b | 57.48 | b | 53.39 | b | 36.20 | f | 26.03 | 9.26 | 35.91 | a | |||||
2006 | 20.63 | a | 8.82 | 22.76 | b | 38.71 | b | 47.84 | 56.37 | c | 62.65 | 59.42 | 46.13 | 32.61 | 22.43 | 17.68 | 36.34 | |||||||||
2007 | 9.06 | 2.14 | 26.68 | 31.00 | 50.03 | 58.40 | 60.96 | c | 58.82 | c | 49.50 | 41.87 | 23.10 | 7.48 | 34.92 | |||||||||||
2008 | 2.23 | 3.07 | 17.06 | 29.87 | 43.13 | a | 54.60 | 60.58 | 58.10 | b | 48.72 | a | 35.81 | 23.40 | 1.03 | b | 31.47 | |||||||||
2009 | -2.84 | 8.04 | e | 18.50 | a | 30.90 | 39.45 | k | 54.97 | 55.69 | b | 54.59 | b | 49.80 | 32.77 | 29.41 | a | 5.84 | 30.70 | a | ||||||
2010 | -0.67 | a | 3.78 | a | 26.90 | 39.38 | a | 44.28 | b | 57.21 | a | 61.97 | a | 62.83 | a | 47.33 | 37.77 | 23.60 | 4.42 | 34.07 | ||||||
2011 | -1.29 | 5.58 | b | 16.68 | 33.87 | 44.76 | b | 55.28 | e | 64.31 | e | 58.31 | b | 46.24 | a | 39.87 | 23.69 | a | 16.37 | a | 33.64 | |||||
2012 | 12.58 | 14.69 | 33.70 | a | 37.70 | 50.57 | a | 57.30 | c | 66.10 | 56.58 | 45.00 | 34.17 | a | 24.17 | 11.13 | a | 36.97 | ||||||||
2013 | 7.26 | 8.54 | 16.61 | 26.45 | a | 44.87 | 56.03 | a | 59.93 | b | 58.65 | 53.76 | a | 36.60 | a | 19.43 | 0.61 | 32.40 | ||||||||
2014 | -3.53 | a | -2.18 | 14.77 | 30.83 | 42.71 | c | 57.48 | c | 57.87 | 59.42 | 50.10 | 37.52 | 14.73 | 15.23 | 31.25 | ||||||||||
2015 | 9.81 | 2.18 | 23.00 | 33.33 | 45.81 | 57.00 | 60.03 | a | 56.63 | a | 55.47 | 38.50 | a | 28.64 | b | 18.90 | a | 35.78 | ||||||||
2016 | 6.40 | a | 16.71 | a | 28.00 | a | 36.36 | b | 46.43 | a | 58.36 | b | 59.07 | b | 59.03 | a | 50.47 | 35.48 | 30.30 | 6.77 | 36.12 | |||||
2017 | 8.55 | 16.64 | 16.37 | a | 31.63 | 43.45 | 55.24 | e | 58.42 | 53.65 | 49.87 | 35.58 | 20.00 | 8.58 | 33.16 | |||||||||||
2018 | -0.88 | e | -0.15 | b | 19.03 | 21.50 | 50.97 | 59.87 | 60.68 | 58.13 | 51.93 | 32.13 | 16.77 | 13.10 | 31.92 | |||||||||||
2019 | 1.52 | -4.04 | 15.52 | 33.40 | 43.00 | 56.00 | 62.29 | 56.20 | f | 50.97 | 32.26 | 19.37 | 12.55 | 29.35 | a | |||||||||||
2020 | 7.84 | 9.00 | 24.86 | b | 27.83 | 42.94 | 57.23 | 62.08 | f | 58.90 | 47.03 | 28.35 | 26.83 | 13.94 | 31.34 | a | ||||||||||
2021 | 13.52 | 0.00 | 27.42 | 30.87 | 43.97 | 57.63 | 61.71 | 59.00 | j | 51.77 | 39.94 | 25.97 | 12.84 | 33.24 | a | |||||||||||
2022 | -0.65 | 2.57 | 20.58 | 27.77 | 46.00 | 59.40 | 63.61 | 58.29 | 51.60 | 36.68 | 24.07 | 6.71 | 33.05 | |||||||||||||
2023 | 10.13 | 7.64 | 13.29 | 32.33 | 49.00 | 60.40 | 58.35 | 59.24 | f | 52.67 | 40.39 | 24.80 | 22.48 | 33.77 | a | |||||||||||
2024 | 9.42 | 23.48 | 23.13 | 34.69 | n | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 18.68 | i | |||
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 4.93 | 9.12 | 21.30 | 33.32 | 46.18 | 56.42 | 60.97 | 58.07 | 49.24 | 36.27 | 23.10 | 10.35 | 34.08 | |||||||||||||
S.D. | 6.94 | 7.64 | 4.89 | 3.85 | 3.37 | 2.52 | 2.59 | 2.54 | 2.89 | 3.20 | 4.58 | 6.38 | 1.80 | |||||||||||||
SKEW | -0.06 | 0.18 | -0.07 | -0.39 | 0.49 | -0.04 | -0.60 | -0.15 | -0.04 | -0.23 | -0.26 | -0.61 | 0.36 | |||||||||||||
MAX | 20.63 | 24.32 | 33.70 | 39.38 | 53.55 | 62.73 | 66.10 | 64.71 | 55.47 | 42.90 | 33.20 | 22.48 | 38.71 | |||||||||||||
MIN | -9.39 | -4.04 | 9.79 | 21.50 | 40.84 | 50.79 | 53.67 | 52.33 | 43.34 | 28.35 | 13.38 | -6.68 | 30.88 | |||||||||||||
YRS | 49 | 50 | 50 | 49 | 49 | 47 | 48 | 46 | 50 | 48 | 50 | 50 | 38 |