| YEAR(S) | JUL | AUG | SEP | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | ANN | |||||||||||||
| 1939-40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | 0.00 | 0.00 | j | ||
| 1940-41 | 0.00 | ----- | z | ----- | z | 0.00 | 25.00 | 6.50 | 12.50 | 7.60 | 6.00 | 3.00 | a | 0.00 | 0.00 | 60.60 | b | |||||||||
| 1941-42 | 0.00 | 0.00 | 0.00 | 1.10 | 0.80 | 4.80 | 0.70 | 3.50 | 6.70 | 3.50 | q | 0.00 | ----- | z | 17.60 | b | ||||||||||
| 1942-43 | 0.00 | 0.00 | 3.20 | 4.00 | 0.40 | 12.10 | 8.70 | b | 7.00 | 20.80 | 0.00 | 0.00 | 0.00 | 56.20 | ||||||||||||
| 1943-44 | 0.00 | 0.00 | 0.00 | 0.00 | 6.80 | 0.30 | 1.40 | 5.40 | 14.20 | 0.00 | 0.90 | 0.00 | 29.00 | |||||||||||||
| 1944-45 | 0.00 | 0.00 | 0.00 | 0.00 | 3.60 | 3.00 | 7.20 | 14.90 | 2.30 | 5.20 | 0.00 | 0.00 | 36.20 | |||||||||||||
| 1945-46 | 0.00 | 0.00 | 0.00 | 0.00 | 5.50 | 14.20 | 2.10 | 9.90 | 6.90 | 1.70 | 0.00 | 0.00 | 40.30 | |||||||||||||
| 1946-47 | 0.00 | 0.00 | 0.00 | 1.30 | 5.80 | 8.70 | 1.70 | 2.70 | 10.10 | 7.50 | 0.00 | 0.00 | 37.80 | |||||||||||||
| 1947-48 | 0.00 | 0.00 | 0.00 | 0.00 | 27.70 | 1.60 | 6.00 | 10.80 | 8.00 | 0.30 | 0.00 | 0.00 | 54.40 | |||||||||||||
| 1948-49 | 0.00 | 0.00 | 0.00 | 0.00 | 9.30 | 2.90 | 15.50 | 6.20 | 1.30 | a | 0.00 | 0.00 | 0.00 | 35.20 | ||||||||||||
| 1949-50 | 0.00 | 0.00 | 0.00 | 0.00 | 3.70 | 3.50 | 18.50 | 1.10 | 12.40 | 14.60 | 0.60 | 0.00 | 54.40 | |||||||||||||
| 1950-51 | 0.00 | 0.00 | 0.00 | 0.00 | 5.10 | 9.40 | 10.30 | 6.80 | 36.40 | 3.70 | 0.00 | 0.00 | 71.70 | |||||||||||||
| 1951-52 | 0.00 | 0.00 | 0.00 | 7.10 | 7.60 | 11.80 | 15.00 | 16.50 | 11.70 | 0.10 | 0.00 | 0.00 | 69.80 | |||||||||||||
| 1952-53 | 0.00 | 0.00 | 0.00 | 0.00 | 4.50 | 4.20 | 7.00 | 9.40 | 4.20 | 6.40 | 0.00 | 0.00 | 35.70 | |||||||||||||
| 1953-54 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 12.00 | 10.00 | 6.60 | 10.20 | 1.80 | 3.00 | 0.00 | 43.60 | |||||||||||||
| 1954-55 | 0.00 | 0.00 | 0.00 | 0.00 | 2.10 | 0.90 | 5.30 | 14.40 | a | 3.40 | 0.00 | 0.00 | a | 0.00 | 26.10 | |||||||||||
| 1955-56 | 0.00 | a | 0.00 | 0.00 | a | 0.00 | 5.30 | 14.70 | a | 10.50 | 5.70 | 9.00 | 5.80 | 0.00 | 0.00 | 51.00 | ||||||||||
| 1956-57 | 0.00 | 0.00 | 0.00 | a | 0.00 | 4.50 | 7.00 | 2.10 | 5.60 | 12.20 | 4.30 | 0.00 | 0.00 | 35.70 | ||||||||||||
| 1957-58 | 0.00 | 0.00 | 0.00 | 0.00 | 1.20 | 4.80 | 6.40 | 1.80 | 2.70 | 2.50 | 0.00 | 0.00 | 19.40 | |||||||||||||
| 1958-59 | 0.00 | 0.00 | 0.00 | 0.00 | 1.50 | 1.70 | 1.30 | 5.00 | 1.40 | 0.00 | 0.00 | 0.00 | 10.90 | |||||||||||||
| 1959-60 | 0.00 | 0.00 | 0.00 | 5.00 | 3.50 | 2.30 | 6.60 | 0.80 | 5.60 | 5.10 | 0.00 | 0.00 | 28.90 | |||||||||||||
| 1960-61 | 0.00 | 0.00 | 0.00 | 0.00 | 2.60 | 3.00 | 1.60 | 0.60 | 2.50 | 8.70 | 0.00 | 0.00 | 19.00 | |||||||||||||
| 1961-62 | 0.00 | 0.00 | 0.00 | 0.00 | 2.30 | 8.30 | 7.60 | 11.90 | 8.50 | 3.80 | 0.00 | 0.00 | 42.40 | |||||||||||||
| 1962-63 | 0.00 | 0.00 | 0.00 | 0.00 | 4.00 | 1.70 | 3.90 | a | 3.80 | 11.50 | 1.90 | 0.00 | 0.00 | 26.80 | ||||||||||||
| 1963-64 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 9.40 | 3.10 | 1.20 | 12.70 | 4.30 | 0.00 | 0.00 | 30.70 | |||||||||||||
| 1964-65 | 0.00 | 0.00 | 0.00 | 1.70 | 3.20 | 6.00 | 8.80 | 7.30 | 32.60 | 0.90 | 0.00 | a | 0.00 | 60.50 | ||||||||||||
| 1965-66 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | b | 2.20 | 9.90 | 2.20 | 12.40 | 12.60 | 0.20 | 0.00 | 39.60 | ||||||||||||
| 1966-67 | 0.00 | 0.00 | 0.00 | 0.00 | 4.40 | a | 8.10 | 25.30 | 11.50 | 2.80 | 0.40 | 0.10 | 0.00 | 52.60 | ||||||||||||
| 1967-68 | 0.00 | 0.00 | 0.00 | 1.00 | 0.70 | 1.90 | 6.90 | 1.40 | 0.00 | 9.30 | 0.00 | 0.00 | 21.20 | |||||||||||||
| 1968-69 | 0.00 | 0.00 | 0.00 | 0.00 | 2.90 | 23.10 | 22.90 | 5.10 | 3.50 | 1.20 | 0.00 | 0.00 | 58.70 | |||||||||||||
| 1969-70 | 0.00 | 0.00 | 0.00 | 0.90 | 5.40 | 11.80 | 1.90 | 3.00 | 9.40 | 11.60 | 0.00 | 0.00 | 44.00 | |||||||||||||
| 1970-71 | 0.00 | 0.00 | 0.00 | 4.70 | 12.60 | 3.10 | 11.80 | 17.10 | 2.90 | 3.90 | 0.00 | 0.00 | 56.10 | |||||||||||||
| 1971-72 | 0.00 | 0.00 | 0.00 | 2.40 | 7.60 | 5.50 | 14.00 | 7.60 | 13.30 | 4.40 | 0.00 | 0.00 | 54.80 | |||||||||||||
| 1972-73 | 0.00 | 0.00 | 0.00 | 2.40 | 0.60 | 12.30 | 2.00 | 4.50 | a | 0.80 | 0.00 | 0.00 | 0.00 | 22.60 | ||||||||||||
| 1973-74 | 0.00 | 0.00 | 0.00 | 0.00 | 1.70 | 7.00 | 2.30 | 8.80 | a | 7.10 | a | 0.10 | 0.00 | 0.00 | 27.00 | |||||||||||
| 1974-75 | 0.00 | 0.00 | 0.00 | 0.10 | 0.90 | 2.90 | 41.50 | 7.70 | 21.30 | 3.10 | 0.00 | 0.00 | 77.50 | |||||||||||||
| 1975-76 | 0.00 | 0.00 | 0.00 | 0.00 | 12.30 | 0.80 | 10.20 | 4.30 | 14.30 | 2.30 | 0.00 | 0.00 | 44.20 | |||||||||||||
| 1976-77 | 0.00 | 0.00 | 0.00 | 0.10 | 1.70 | 2.90 | 8.80 | 7.00 | 8.90 | 1.20 | 0.00 | 0.00 | 30.60 | |||||||||||||
| 1977-78 | 0.00 | 0.00 | 0.00 | 0.00 | 10.00 | a | 12.10 | 1.40 | 3.10 | 4.80 | 3.40 | 0.00 | 0.00 | 34.80 | ||||||||||||
| 1978-79 | 0.00 | 0.00 | 0.00 | 0.00 | 2.40 | 5.60 | 11.90 | 17.30 | 10.80 | 1.10 | 0.00 | 0.00 | 49.10 | |||||||||||||
| 1979-80 | 0.00 | 0.00 | 0.00 | 0.00 | 5.00 | 0.60 | 13.10 | 4.80 | 10.20 | 0.00 | 0.00 | 0.00 | 33.70 | |||||||||||||
| 1980-81 | 0.00 | 0.00 | 0.00 | 0.00 | 0.60 | 2.40 | 5.20 | 7.90 | 0.00 | 0.00 | 0.00 | 0.00 | 16.10 | |||||||||||||
| 1981-82 | 0.00 | 0.00 | 0.00 | 0.90 | 9.00 | 7.50 | 22.70 | 3.00 | 16.90 | a | 5.40 | 0.00 | 0.00 | 65.40 | ||||||||||||
| 1982-83 | 0.00 | 0.00 | 0.00 | 0.20 | 7.30 | 4.30 | 8.40 | 0.80 | 9.70 | 4.30 | 0.00 | 0.00 | 35.00 | |||||||||||||
| 1983-84 | 0.00 | 0.00 | 0.00 | 0.00 | 18.60 | 6.90 | 9.40 | 6.30 | 9.70 | 0.10 | 0.00 | 0.00 | 51.00 | |||||||||||||
| 1984-85 | 0.00 | 0.00 | 0.00 | 1.80 | 0.20 | 4.80 | 8.50 | 2.40 | 19.50 | 0.10 | 0.00 | 0.00 | 37.30 | |||||||||||||
| 1985-86 | 0.00 | 0.00 | 0.90 | 0.00 | 19.10 | a | 14.10 | 9.70 | 10.90 | 8.10 | 0.00 | 0.00 | 0.00 | 62.80 | ||||||||||||
| 1986-87 | 0.00 | 0.00 | 0.00 | 0.30 | 9.00 | 1.10 | 7.30 | 6.30 | 0.70 | 0.10 | 0.00 | 0.00 | 24.80 | |||||||||||||
| 1987-88 | 0.00 | 0.00 | 0.00 | 1.30 | 0.00 | 4.80 | 12.20 | 0.80 | a | 10.60 | 1.20 | 0.00 | 0.00 | 30.90 | ||||||||||||
| 1988-89 | 0.00 | 0.00 | 0.00 | 0.20 | 16.20 | 7.20 | 9.40 | 7.30 | 18.10 | 1.30 | 0.00 | 0.00 | 59.70 | |||||||||||||
| 1989-90 | 0.00 | 0.00 | 0.00 | 0.00 | 7.80 | 3.80 | 1.60 | 10.20 | 5.60 | 4.10 | 0.00 | 0.00 | 33.10 | |||||||||||||
| 1990-91 | 0.00 | 0.00 | 0.00 | 0.00 | 0.90 | 8.80 | 4.70 | 12.30 | 7.20 | 9.70 | 0.00 | 0.00 | 43.60 | |||||||||||||
| 1991-92 | 0.00 | 0.00 | 0.00 | 0.80 | 9.80 | 7.10 | 9.20 | 3.60 | 3.10 | 7.70 | 0.00 | 0.00 | 41.30 | |||||||||||||
| 1992-93 | 0.00 | 0.00 | 0.00 | 0.50 | 7.50 | a | 10.10 | 10.80 | 1.80 | 5.90 | 0.80 | 0.00 | 0.00 | 37.40 | ||||||||||||
| 1993-94 | 0.00 | 0.00 | 0.00 | 0.00 | 8.70 | 9.70 | 17.00 | 8.10 | 4.90 | 3.50 | 0.00 | 0.00 | 51.90 | |||||||||||||
| 1994-95 | 0.00 | 0.00 | 0.00 | 0.00 | 4.20 | 4.90 | 6.40 | 8.40 | 15.30 | 6.50 | 0.00 | 0.00 | 45.70 | |||||||||||||
| 1995-96 | 0.00 | 0.00 | 0.00 | 6.00 | 4.40 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 10.40 | g | |||||
| 1996-97 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1997-98 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1998-99 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 1999-00 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | r | 0.00 | f | 0.00 | n | 0.00 | r | 0.00 | v | ----- | z | 0.00 | l |
| 2000-01 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2001-02 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | y | 0.00 | y | 0.00 | x | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2002-03 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2003-04 | ----- | z | ----- | z | 0.00 | ----- | z | 0.00 | x | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | ----- | z | ----- | z | 0.00 | j | ||
| 2004-05 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | y | 0.00 | s | 0.00 | x | 0.00 | x | ----- | z | ----- | z | 0.00 | l |
| 2005-06 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2006-07 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2007-08 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2008-09 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2009-10 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2010-11 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2011-12 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2012-13 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2013-14 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2014-15 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2015-16 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2016-17 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2017-18 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2018-19 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2019-20 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2020-21 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2021-22 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2022-23 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| 2023-24 | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | ----- | z | 0.00 | l |
| Period of Record Statistics | ||||||||||||||||||||||||||
| MEAN | 0.00 | 0.00 | 0.07 | 0.78 | 5.85 | 6.40 | 9.09 | 6.58 | 9.29 | 3.29 | 0.09 | 0.00 | 41.48 | |||||||||||||
| S.D. | 0.00 | 0.00 | 0.44 | 1.60 | 6.01 | 4.57 | 7.23 | 4.37 | 7.29 | 3.57 | 0.42 | 0.00 | 15.08 | |||||||||||||
| SKEW | 0.00 | 0.00 | 6.61 | 2.48 | 1.80 | 1.08 | 1.97 | 0.73 | 1.56 | 1.26 | 6.19 | 0.00 | 0.28 | |||||||||||||
| MAX | 0.00 | 0.00 | 3.20 | 7.10 | 27.70 | 23.10 | 41.50 | 17.30 | 36.40 | 14.60 | 3.00 | 0.00 | 77.50 | |||||||||||||
| MIN | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.30 | 0.70 | 0.60 | 0.00 | 0.00 | 0.00 | 0.00 | 10.90 | |||||||||||||
| YRS | 56 | 55 | 56 | 56 | 56 | 55 | 55 | 55 | 55 | 55 | 56 | 55 | 53 | |||||||||||||