YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
1948 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1949 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1950 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1951 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1952 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1953 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1954 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1955 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1956 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1957 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1958 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1959 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1960 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
1961 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 65.05 | 68.34 | 69.21 | 58.65 | 48.76 | 31.77 | 15.82 | 51.09 | e | |||||||
1962 | 7.11 | 11.98 | 26.92 | 41.78 | 60.19 | 63.76 | a | 65.15 | 65.92 | 55.33 | 49.55 | 33.65 | 18.16 | 41.63 | ||||||||||||
1963 | 2.42 | 10.46 | 31.11 | 45.82 | 54.00 | 65.78 | 69.48 | 65.24 | 59.88 | 54.97 | 36.12 | 7.72 | a | 41.92 | ||||||||||||
1964 | 18.15 | 20.27 | n | 23.91 | d | 45.18 | 59.32 | 65.58 | 73.23 | 66.45 | 56.88 | 46.18 | 33.48 | 11.50 | 45.44 | a | ||||||||||
1965 | 6.52 | 9.71 | 18.15 | 40.53 | 59.15 | 63.63 | 66.77 | 65.11 | 52.45 | 48.74 | 31.57 | 24.61 | 40.58 | |||||||||||||
1966 | 2.38 | a | 14.41 | 32.55 | 40.70 | 51.40 | 66.13 | 71.97 | 64.82 | 57.62 | 45.74 | 29.62 | 16.74 | 41.17 | ||||||||||||
1967 | 13.50 | 7.23 | 27.26 | 43.95 | 50.21 | 64.88 | 66.84 | 63.81 | 57.17 | 45.00 | 29.17 | 19.63 | 40.72 | |||||||||||||
1968 | 11.39 | 11.84 | 36.55 | a | 47.07 | 52.21 | 64.22 | 68.52 | 67.50 | 58.58 | 49.89 | 32.33 | 16.26 | 43.03 | ||||||||||||
1969 | 8.56 | 17.48 | 22.68 | 46.00 | 57.34 | 58.52 | 69.05 | 70.32 | 59.42 | 44.77 | 31.13 | 19.20 | a | 42.04 | ||||||||||||
1970 | 4.10 | 12.89 | 22.40 | 43.22 | 56.45 | 67.13 | 71.39 | 68.05 | 58.45 | 48.44 | 30.53 | 17.95 | 41.75 | |||||||||||||
1971 | 5.13 | 15.16 | 24.61 | 44.08 | 52.11 | 69.15 | 65.82 | 64.95 | 59.80 | 52.87 | 32.28 | 17.74 | b | 41.98 | ||||||||||||
1972 | 4.90 | 9.34 | 22.97 | 40.22 | 59.37 | 62.85 | 67.27 | 67.39 | 57.03 | 43.00 | 31.72 | 11.08 | 39.76 | |||||||||||||
1973 | 14.40 | 17.95 | 38.47 | 42.25 | 52.68 | 66.17 | 70.34 | 69.98 | 58.18 | 52.85 | 33.37 | 16.42 | 44.42 | |||||||||||||
1974 | 11.11 | 14.89 | 28.34 | 45.03 | 53.47 | 61.85 | 73.15 | 65.03 | 53.58 | 47.98 | 34.07 | 22.84 | 42.61 | |||||||||||||
1975 | 13.65 | 16.12 | 21.53 | a | 36.80 | c | 58.61 | 65.10 | 71.47 | 66.77 | 54.65 | 47.94 | d | 35.28 | 17.75 | a | 42.14 | |||||||||
1976 | 8.03 | 23.93 | 28.20 | a | ----- | z | ----- | z | 65.46 | p | 70.81 | 67.94 | 57.45 | 41.47 | 24.60 | 6.61 | 36.56 | c | ||||||||
1977 | -0.94 | 18.82 | 34.34 | c | 49.29 | d | 64.10 | 63.93 | c | 70.89 | 63.79 | 58.43 | 45.68 | 29.95 | a | 14.10 | 42.70 | |||||||||
1978 | 5.69 | 7.95 | 25.65 | 42.53 | 57.29 | 63.77 | 67.27 | 67.45 | 63.05 | 46.71 | 27.88 | 10.95 | 40.52 | |||||||||||||
1979 | -0.32 | a | 6.14 | 25.84 | 39.90 | 48.09 | o | ----- | z | ----- | z | 65.48 | 60.07 | 44.29 | 30.48 | 23.11 | 32.78 | c | ||||||||
1980 | 12.05 | 12.69 | 23.60 | 46.62 | 58.37 | 63.18 | 69.11 | 67.44 | 58.48 | 43.11 | 34.17 | 18.06 | 42.24 | |||||||||||||
1981 | 16.60 | 21.64 | 35.05 | 47.30 | 54.98 | 65.62 | 69.79 | 68.31 | b | 57.23 | 44.60 | 35.37 | 17.42 | 44.49 | ||||||||||||
1982 | 0.87 | 12.98 | 26.00 | a | 40.17 | 59.95 | a | 59.40 | 70.84 | 66.61 | 57.72 | 48.71 | 30.03 | 24.06 | 41.45 | |||||||||||
1983 | 17.33 | a | 24.50 | 31.71 | 40.10 | 51.19 | 64.27 | 72.68 | 70.97 | 59.77 | 47.65 | 33.52 | 4.55 | 43.19 | ||||||||||||
1984 | 10.16 | 26.53 | 24.13 | 46.20 | 53.39 | 66.17 | 67.44 | 70.29 | 55.95 | 50.90 | a | 32.30 | 18.57 | a | 43.50 | |||||||||||
1985 | 9.69 | 14.50 | 34.76 | 49.59 | a | 59.95 | a | 61.38 | a | 68.00 | 63.50 | 56.60 | 45.55 | 23.17 | a | 5.23 | 40.99 | |||||||||
1986 | 15.73 | c | 13.29 | 31.02 | a | 47.70 | 57.13 | 65.35 | 70.58 | 63.87 | 57.50 | 46.29 | 28.15 | 20.95 | b | 43.13 | ||||||||||
1987 | 17.88 | a | 27.70 | 35.84 | 49.60 | 59.89 | 68.91 | a | 72.27 | a | 65.95 | b | 59.65 | 41.76 | 36.53 | 23.95 | 46.66 | |||||||||
1988 | 8.68 | 12.67 | 31.98 | 46.00 | a | 61.65 | 70.00 | a | 75.11 | 72.66 | 60.66 | a | 42.55 | 32.90 | 18.40 | 44.44 | ||||||||||
1989 | 18.97 | 8.50 | 24.11 | 42.77 | b | 56.22 | a | 64.16 | a | 71.63 | 67.87 | 58.77 | 49.19 | 27.62 | 8.90 | 41.56 | ||||||||||
1990 | 24.20 | a | 19.69 | a | 34.13 | 47.78 | 54.10 | a | 67.15 | 68.97 | 68.05 | 61.97 | 46.82 | 37.73 | 16.74 | 45.61 | ||||||||||
1991 | 11.27 | 22.54 | a | 32.11 | 48.15 | 60.85 | 69.98 | 69.61 | 69.56 | 58.25 | 47.08 | a | 26.28 | l | 21.31 | 46.43 | a | |||||||||
1992 | 17.44 | 25.19 | 31.11 | 40.37 | 58.68 | 62.33 | 63.68 | 63.16 | ----- | z | 44.95 | 30.27 | 19.39 | 41.51 | a | |||||||||||
1993 | 12.48 | 15.11 | 26.44 | 41.40 | 55.45 | 61.40 | 66.42 | 65.92 | f | 49.87 | 42.18 | 27.82 | 16.78 | a | 37.76 | a | ||||||||||
1994 | -0.81 | 6.71 | 30.15 | 41.73 | 55.60 | a | 65.42 | 65.65 | 63.23 | 60.05 | 47.70 | a | 34.10 | 20.45 | c | 40.83 | ||||||||||
1995 | 13.23 | a | 13.07 | 28.38 | b | 36.98 | 52.75 | a | 67.83 | a | 68.07 | b | 69.70 | a | 54.31 | a | 45.21 | b | 21.85 | c | 12.27 | a | 40.30 | |||
1996 | 4.40 | a | 11.86 | 18.74 | 37.60 | 51.22 | a | 62.84 | b | 65.73 | 65.55 | 57.13 | 44.73 | 22.62 | b | 11.71 | 37.84 | |||||||||
1997 | 7.15 | 16.48 | a | 26.93 | b | 40.08 | 48.42 | a | 65.67 | a | 66.48 | a | 62.71 | b | 58.00 | a | 46.00 | 26.77 | 24.39 | 40.76 | ||||||
1998 | 15.60 | 29.07 | a | 27.69 | b | 45.18 | k | ----- | z | 62.90 | 70.03 | b | 68.76 | 62.83 | a | 47.83 | a | 35.71 | a | 22.10 | b | 44.25 | b | |||
1999 | 7.58 | 23.77 | 29.04 | c | 46.17 | 58.03 | 65.05 | 73.67 | y | 66.07 | a | 57.02 | 45.28 | a | 38.91 | c | ----- | z | 43.69 | b | ||||||
2000 | 10.95 | a | 21.22 | b | 37.32 | 42.91 | a | 57.83 | b | 62.43 | 68.44 | 67.23 | 56.93 | 49.69 | 30.29 | a | 4.62 | a | 42.49 | |||||||
2001 | 15.68 | a | 8.34 | 24.43 | d | 45.12 | 56.55 | 64.78 | a | 69.23 | 68.77 | 55.22 | a | 44.45 | 42.52 | a | 25.77 | 43.40 | ||||||||
2002 | 20.50 | a | 24.00 | 20.62 | f | 41.09 | b | 49.47 | a | 66.87 | 73.22 | b | 66.76 | 60.41 | a | 40.77 | a | 29.98 | 22.42 | 45.04 | a | |||||
2003 | 11.76 | 9.85 | a | 25.62 | b | 42.88 | b | 53.62 | a | 63.12 | a | 68.40 | a | 69.65 | a | 58.47 | a | 46.31 | 30.18 | 20.87 | a | 41.73 | ||||
2004 | 7.90 | 15.29 | a | 30.69 | 43.84 | a | 51.56 | 61.33 | 66.94 | 61.02 | 62.38 | 46.90 | a | 35.80 | c | 18.19 | b | 41.82 | ||||||||
2005 | 12.05 | 22.06 | a | 23.81 | b | 46.83 | 52.05 | 68.52 | 69.88 | a | 59.38 | b | 52.09 | b | 46.19 | 32.85 | 17.06 | 41.90 | ||||||||
2006 | 24.76 | 15.29 | 29.29 | 48.78 | a | 57.32 | a | 65.75 | b | 74.45 | 67.68 | 54.80 | 42.16 | b | 33.72 | 26.50 | a | 45.04 | ||||||||
2007 | 17.56 | 8.86 | 33.13 | 42.60 | 58.39 | 66.95 | 69.37 | 67.13 | 59.52 | 51.24 | 31.76 | a | 12.65 | a | 43.26 | |||||||||||
2008 | 9.80 | a | 9.48 | b | 22.27 | 39.62 | 51.05 | a | 64.12 | 68.92 | 66.24 | 60.02 | 45.81 | 32.07 | 9.76 | 39.93 | ||||||||||
2009 | 1.47 | 16.86 | 27.68 | 43.29 | a | 55.27 | 63.91 | a | 63.35 | a | 64.47 | a | 60.90 | 41.08 | 39.13 | 15.63 | 41.09 | |||||||||
2010 | 10.61 | 14.82 | 35.81 | 49.90 | 56.63 | 64.37 | 70.63 | 70.47 | 55.63 | 48.26 | 32.17 | 12.90 | 43.52 | |||||||||||||
2011 | 7.84 | 14.04 | a | 23.63 | 41.15 | 53.31 | 64.02 | 73.29 | 67.50 | 57.02 | 50.17 | a | 35.48 | b | 23.63 | 42.59 | ||||||||||
2012 | 18.26 | 24.60 | 44.37 | 45.17 | 60.31 | 67.21 | a | 74.13 | 66.91 | d | 57.50 | 42.47 | 33.10 | 21.10 | 46.26 | |||||||||||
2013 | 13.06 | 14.00 | 19.81 | 35.87 | 53.38 | a | 64.90 | a | 69.45 | a | 69.24 | d | 61.79 | b | 46.69 | 29.33 | 7.16 | b | 40.39 | |||||||
2014 | 3.21 | 2.23 | 19.80 | a | 38.13 | d | 55.34 | 67.12 | a | 67.48 | 67.94 | d | 58.14 | a | 45.80 | a | 23.55 | 23.26 | 39.33 | |||||||
2015 | 13.44 | 6.27 | 31.05 | 45.83 | 56.34 | 65.15 | 69.08 | 65.94 | 65.74 | a | 48.00 | 38.58 | 29.76 | 44.60 | ||||||||||||
2016 | 13.55 | 19.33 | 37.52 | 43.78 | c | 55.95 | 66.10 | a | 70.00 | 68.84 | 61.85 | 49.10 | 40.95 | 17.77 | 45.39 | |||||||||||
2017 | 16.56 | 26.64 | 29.15 | 46.05 | 53.55 | 65.23 | 68.73 | a | 63.85 | 61.88 | 48.76 | 29.17 | 14.85 | 43.70 | ||||||||||||
2018 | 10.39 | 9.61 | 27.29 | 31.37 | 62.63 | 67.52 | 69.50 | 67.69 | 61.07 | 42.11 | 25.33 | 22.40 | 41.41 | |||||||||||||
2019 | 12.18 | 9.25 | 22.11 | 42.03 | 51.40 | 64.47 | 70.58 | 65.61 | 61.30 | 43.69 | 27.40 | 18.40 | 40.70 | |||||||||||||
2020 | 16.94 | 14.90 | 32.68 | 40.45 | 54.45 | 66.28 | 71.02 | 67.98 | 56.87 | 39.21 | 36.82 | 21.37 | 43.25 | |||||||||||||
2021 | 18.10 | 7.84 | 36.65 | 43.92 | 54.63 | 70.27 | 69.69 | 68.35 | 59.57 | 52.42 | 32.95 | 20.58 | 44.58 | |||||||||||||
2022 | 5.00 | 10.29 | 27.56 | 38.60 | 56.52 | 65.92 | 69.63 | 66.85 | 59.63 | 47.13 | 32.95 | 13.90 | 41.17 | |||||||||||||
2023 | 19.05 | 15.36 | 24.52 | a | 42.78 | a | 58.63 | 68.15 | 68.05 | 67.92 | 63.05 | 49.18 | 33.23 | 31.37 | 45.11 | |||||||||||
2024 | 18.74 | d | 29.93 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 24.34 | j | |
Period of Record Statistics | ||||||||||||||||||||||||||
MEAN | 11.20 | 15.41 | 28.53 | 43.21 | 55.79 | 65.10 | 69.40 | 66.82 | 58.39 | 46.52 | 31.90 | 17.51 | 42.39 | |||||||||||||
S.D. | 6.13 | 6.51 | 5.52 | 3.80 | 3.50 | 2.42 | 2.53 | 2.47 | 2.88 | 3.23 | 4.31 | 5.98 | 1.85 | |||||||||||||
SKEW | -0.08 | 0.44 | 0.37 | -0.42 | 0.08 | -0.13 | -0.01 | -0.43 | -0.32 | 0.13 | -0.12 | -0.28 | 0.23 | |||||||||||||
MAX | 24.76 | 29.93 | 44.37 | 49.90 | 64.10 | 70.27 | 75.11 | 72.66 | 65.74 | 54.97 | 42.52 | 31.37 | 46.66 | |||||||||||||
MIN | -0.94 | 2.23 | 18.15 | 31.37 | 48.42 | 58.52 | 63.35 | 59.38 | 49.87 | 39.21 | 21.85 | 4.55 | 37.84 | |||||||||||||
YRS | 63 | 62 | 61 | 60 | 59 | 61 | 61 | 62 | 62 | 63 | 62 | 62 | 53 |