FROST Station : KETCHIKAN, AK4590 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 9, 28 deg = 8, 32 deg = 6 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 21, 28 deg = 22, 32 deg = 24 Fall: Years of missing data 24 deg = 6, 28 deg = 6, 32 deg = 6 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 24, 28 deg = 24, 32 deg = 24 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | May 1 | May 9 | May 28 | | | 2 year in 10 later than-- | April 13 | April 25 | May 17 | | | 5 year in 10 later than-- | March 10 | March 30 | April 26 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 20 | October 12 |September 29 | | | 2 yr in 10 earlier than-- | November 2 | October 23 | October 7 | | | 5 yr in 10 earlier than-- | November 29 | November 12 | October 22 | | | ------------------------------------------------------------------------