FROST Station : BONNEVILLE DAM, OR0897 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 0, 28 deg = 0, 32 deg = 0 Years with no occurrence 24 deg = 8, 28 deg = 1, 32 deg = 0 Data years used 24 deg = 30, 28 deg = 30, 32 deg = 30 Fall: Years of missing data 24 deg = 0, 28 deg = 0, 32 deg = 0 Years with no occurrence 24 deg = 7, 28 deg = 1, 32 deg = 0 Data years used 24 deg = 30, 28 deg = 30, 32 deg = 30 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | February 20 | March 15 | April 21 | | | 2 year in 10 later than-- | February 10 | March 3 | April 10 | | | 5 year in 10 later than-- | January 19 | February 8 | March 20 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | December 2 | November 20 | November 2 | | | 2 yr in 10 earlier than-- | December 13 | November 30 | November 9 | | | 5 yr in 10 earlier than-- | January 6 | December 21 | November 23 | | | ------------------------------------------------------------------------ FROST Station : PORTLAND WSFO, OR6751 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 1, 28 deg = 1, 32 deg = 0 Years with no occurrence 24 deg = 2, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 29, 28 deg = 29, 32 deg = 30 Fall: Years of missing data 24 deg = 0, 28 deg = 0, 32 deg = 0 Years with no occurrence 24 deg = 2, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 30, 28 deg = 30, 32 deg = 30 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | February 25 | March 23 | April 23 | | | 2 year in 10 later than-- | February 14 | March 13 | April 14 | | | 5 year in 10 later than-- | January 25 | February 25 | March 27 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | November 21 | November 7 | October 18 | | | 2 yr in 10 earlier than-- | December 2 | November 16 | October 26 | | | 5 yr in 10 earlier than-- | December 23 | December 2 | November 10 | | | ------------------------------------------------------------------------ FROST Station : TROUTDALE SUBSTATION, OR8634 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 4, 28 deg = 4, 32 deg = 3 Years with no occurrence 24 deg = 5, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 26, 28 deg = 26, 32 deg = 27 Fall: Years of missing data 24 deg = 4, 28 deg = 4, 32 deg = 3 Years with no occurrence 24 deg = 5, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 26, 28 deg = 26, 32 deg = 27 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | February 19 | March 16 | April 23 | | | 2 year in 10 later than-- | February 7 | March 6 | April 15 | | | 5 year in 10 later than-- | January 10 | February 15 | April 1 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | December 3 | October 18 | October 12 | | | 2 yr in 10 earlier than-- | December 13 | November 3 | October 22 | | | 5 yr in 10 earlier than-- | January 5 | December 4 | November 11 | | | ------------------------------------------------------------------------