| YEAR(S) | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | ANN | |||||||||||||
| 1951 | 5.00 | d | 15.00 | b | 13.00 | c | 33.00 | b | 26.00 | f | 33.00 | 46.00 | c | 45.00 | g | 41.00 | b | 25.00 | f | 17.00 | b | 7.00 | a | ----- | z | |
| 1952 | -2.00 | d | 17.00 | c | 12.00 | 30.00 | 32.00 | 33.00 | 47.00 | 45.00 | e | 37.00 | h | 30.00 | a | 8.00 | b | 10.00 | a | -2.00 | x | |||||
| 1953 | 20.00 | 10.00 | b | 12.00 | d | 18.00 | g | 23.00 | b | 33.00 | b | 48.00 | 42.00 | d | 40.00 | c | 26.00 | c | 15.00 | a | 10.00 | ----- | z | |||
| 1954 | 10.00 | 21.00 | 16.00 | b | 28.00 | 26.00 | 30.00 | a | 46.00 | 41.00 | 32.00 | 22.00 | 7.00 | a | 3.00 | 3.00 | d | |||||||||
| 1955 | 2.00 | 8.00 | 13.00 | a | 20.00 | 31.00 | b | 36.00 | 38.00 | b | 48.00 | a | 36.00 | a | 24.00 | 14.00 | b | 15.00 | 2.00 | i | ||||||
| 1956 | 6.00 | -1.00 | 17.00 | b | 23.00 | b | 33.00 | b | 38.00 | 46.00 | 46.00 | 37.00 | b | 16.00 | 13.00 | -1.00 | b | -1.00 | j | |||||||
| 1957 | -2.00 | b | 10.00 | 22.00 | b | 28.00 | 32.00 | 44.00 | 48.00 | 43.00 | q | 34.00 | ----- | 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 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1962 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1963 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1964 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1965 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1966 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1967 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1968 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1969 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1970 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1971 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1972 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1973 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z |
| 1974 | -3.00 | b | 12.00 | 17.00 | 24.00 | a | 27.00 | 38.00 | b | 37.00 | a | 42.00 | 35.00 | 27.00 | 17.00 | -6.00 | -6.00 | f | ||||||||
| 1975 | 1.00 | 12.00 | a | 16.00 | 20.00 | 29.00 | ----- | z | ----- | z | ----- | z | ----- | z | 20.00 | u | 10.00 | 6.00 | ----- | z | ||||||
| 1976 | 5.00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 4.20 | 11.56 | 15.33 | 25.75 | 29.13 | 35.63 | 44.50 | 44.00 | 36.43 | 24.17 | 12.63 | 5.50 | 3.00 | |||||||||||||
| S.D. | 6.92 | 6.19 | 3.24 | 4.74 | 3.52 | 4.37 | 4.41 | 2.76 | 3.21 | 4.83 | 3.89 | 6.70 | 0.0 | |||||||||||||
| SKEW | 1.15 | -0.55 | 0.81 | 0.11 | -0.55 | 0.70 | -1.04 | 0.31 | 0.20 | -0.64 | -0.29 | -0.39 | 0.00 | |||||||||||||
| MAX | 20.00 | 21.00 | 22.00 | 33.00 | 33.00 | 44.00 | 48.00 | 48.00 | 41.00 | 30.00 | 17.00 | 15.00 | 3.00 | |||||||||||||
| MIN | -3.00 | -1.00 | 12.00 | 20.00 | 23.00 | 30.00 | 37.00 | 41.00 | 32.00 | 16.00 | 7.00 | -6.00 | 3.00 | |||||||||||||
| YRS | 10 | 9 | 9 | 8 | 8 | 8 | 8 | 6 | 7 | 6 | 8 | 8 | 1 | |||||||||||||