| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 30.10 | 17.39 | 23.74 | j | ||
| 1969 | 22.33 | a | 18.63 | a | 23.58 | 32.55 | a | 41.29 | 47.48 | a | 56.48 | 55.96 | c | 49.80 | 31.39 | 24.93 | 22.16 | 35.55 | ||||||||
| 1970 | 24.94 | 28.96 | 25.48 | 29.77 | 41.19 | 48.37 | 57.77 | 58.20 | a | 41.17 | 30.17 | a | 32.25 | b | 18.42 | 36.39 | ||||||||||
| 1971 | 22.87 | 23.14 | 26.71 | 32.63 | 39.19 | 48.03 | 57.26 | 57.97 | 39.00 | 29.77 | 25.13 | 11.62 | b | 34.44 | ||||||||||||
| 1972 | 16.00 | b | 24.93 | 32.03 | a | 30.70 | 43.27 | a | 54.20 | 58.26 | 56.06 | 45.10 | 35.45 | 26.00 | 10.67 | a | 36.06 | |||||||||
| 1973 | 15.74 | 24.82 | 28.39 | 32.60 | 45.13 | 50.17 | 56.26 | 52.27 | a | 40.50 | 30.29 | 25.89 | b | 23.66 | b | 35.48 | ||||||||||
| 1974 | 22.26 | 25.38 | b | 31.68 | c | 32.67 | 42.80 | a | 53.53 | 56.19 | 52.97 | 44.60 | 35.17 | a | 26.77 | 18.93 | a | 36.91 | ||||||||
| 1975 | 14.30 | a | 23.56 | c | 25.50 | a | 27.87 | 38.61 | 47.30 | c | 59.71 | 51.03 | 45.27 | 32.65 | 21.91 | g | 21.19 | 35.18 | a | |||||||
| 1976 | 18.81 | 25.76 | d | 25.04 | g | 28.00 | 40.97 | 42.03 | 55.61 | 45.23 | e | 43.21 | b | 30.19 | 22.73 | 9.48 | 32.91 | a | ||||||||
| 1977 | 12.26 | 23.96 | 24.94 | 36.27 | 38.93 | a | 55.93 | 57.87 | 56.90 | a | 47.73 | 37.06 | 27.23 | 28.29 | 37.28 | |||||||||||
| 1978 | 24.58 | 23.74 | a | 34.97 | 34.33 | 39.03 | 46.40 | 55.06 | 52.35 | 43.90 | 36.71 | 24.13 | 12.55 | 35.65 | ||||||||||||
| 1979 | 13.23 | ----- | z | 30.19 | 33.63 | 43.26 | 49.53 | 57.90 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 37.96 | f | ||||||
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 18.85 | 24.29 | 28.35 | 31.91 | 41.24 | 49.36 | 57.13 | 53.89 | 44.03 | 32.88 | 26.52 | 17.67 | 35.97 | |||||||||||||
| S.D. | 4.73 | 2.59 | 3.73 | 2.60 | 2.17 | 3.97 | 1.35 | 3.98 | 3.28 | 2.93 | 2.82 | 6.02 | 0.90 | |||||||||||||
| SKEW | -0.05 | -0.52 | 0.42 | -0.20 | 0.30 | 0.05 | 0.25 | -0.91 | 0.17 | 0.31 | 0.84 | 0.15 | -0.13 | |||||||||||||
| MAX | 24.94 | 28.96 | 34.97 | 36.27 | 45.13 | 55.93 | 59.71 | 58.20 | 49.80 | 37.06 | 32.25 | 28.29 | 37.28 | |||||||||||||
| MIN | 12.26 | 18.63 | 23.58 | 27.87 | 38.61 | 42.03 | 55.06 | 45.23 | 39.00 | 29.77 | 22.73 | 9.48 | 34.44 | |||||||||||||
| YRS | 11 | 10 | 10 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 11 | 8 | |||||||||||||