FROST Station : ATTU N A U, AK0452 Start yr. - 1961 End yr. - 1989 Requested years of data: 29 Available years of data: 29 Spring: Years of missing data 24 deg = 10, 28 deg = 8, 32 deg = 5 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 19, 28 deg = 21, 32 deg = 24 Fall: Years of missing data 24 deg = 8, 28 deg = 7, 32 deg = 5 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 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | June 3 | June 7 | July 1 | | | 2 year in 10 later than-- | May 17 | May 25 | June 19 | | | 5 year in 10 later than-- | April 15 | May 1 | May 25 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 22 |September 21 |September 6 | | | 2 yr in 10 earlier than-- | November 1 | October 5 |September 18 | | | 5 yr in 10 earlier than-- | November 20 | November 1 | October 11 | | | ------------------------------------------------------------------------ FROST Station : SHEMYA USAF BASE, AK8419 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 3, 28 deg = 2, 32 deg = 2 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 27, 28 deg = 28, 32 deg = 28 Fall: Years of missing data 24 deg = 3, 28 deg = 3, 32 deg = 2 Years with no occurrence 24 deg = 1, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 27, 28 deg = 27, 32 deg = 28 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | April 20 | May 13 | May 23 | | | 2 year in 10 later than-- | April 9 | May 5 | May 17 | | | 5 year in 10 later than-- | March 19 | April 20 | May 6 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | November 13 | October 31 | October 7 | | | 2 yr in 10 earlier than-- | November 22 | November 6 | October 14 | | | 5 yr in 10 earlier than-- | December 10 | November 17 | October 26 | | | ------------------------------------------------------------------------ FROST Station : DUTCH HARBOR, AK2587 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 9 Spring: Years of missing data 24 deg = 23, 28 deg = 23, 32 deg = 23 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 7, 28 deg = 7, 32 deg = 7 Fall: Years of missing data 24 deg = 24, 28 deg = 21, 32 deg = 21 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 6, 28 deg = 9, 32 deg = 9 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | May 17 | May 16 | June 1 | | | 2 year in 10 later than-- | May 11 | May 12 | May 28 | | | 5 year in 10 later than-- | April 29 | May 5 | May 21 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 3 |September 27 |September 14 | | | 2 yr in 10 earlier than-- | October 16 | October 5 |September 22 | | | 5 yr in 10 earlier than-- | November 11 | October 22 | October 7 | | | ------------------------------------------------------------------------