FROST Station : BIGFORK 13 S, MT0755 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 10, 28 deg = 10, 32 deg = 7 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 20, 28 deg = 20, 32 deg = 23 Fall: Years of missing data 24 deg = 12, 28 deg = 11, 32 deg = 10 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 18, 28 deg = 19, 32 deg = 20 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | April 18 | May 2 | May 20 | | | 2 year in 10 later than-- | April 11 | April 27 | May 16 | | | 5 year in 10 later than-- | March 29 | April 19 | May 9 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 2 |September 25 |September 13 | | | 2 yr in 10 earlier than-- | October 12 | October 4 |September 18 | | | 5 yr in 10 earlier than-- | November 1 | October 20 |September 29 | | | ------------------------------------------------------------------------ FROST Station : POLSON, MT6635 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 25 Spring: Years of missing data 24 deg = 10, 28 deg = 9, 32 deg = 9 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 20, 28 deg = 21, 32 deg = 21 Fall: Years of missing data 24 deg = 10, 28 deg = 10, 32 deg = 10 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 20, 28 deg = 20, 32 deg = 20 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | April 29 | May 10 | May 22 | | | 2 year in 10 later than-- | April 20 | May 5 | May 17 | | | 5 year in 10 later than-- | April 2 | April 26 | May 9 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 4 |September 22 |September 12 | | | 2 yr in 10 earlier than-- | October 11 |September 28 |September 16 | | | 5 yr in 10 earlier than-- | October 25 | October 11 |September 26 | | | ------------------------------------------------------------------------ FROST Station : POLSON KERR DAM, MT6640 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 2, 28 deg = 2, 32 deg = 1 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 28, 28 deg = 28, 32 deg = 29 Fall: Years of missing data 24 deg = 0, 28 deg = 0, 32 deg = 0 Years with no occurrence 24 deg = 0, 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-- | April 23 | May 10 | May 29 | | | 2 year in 10 later than-- | April 17 | May 4 | May 24 | | | 5 year in 10 later than-- | April 5 | April 24 | May 14 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 8 |September 21 |September 13 | | | 2 yr in 10 earlier than-- | October 14 |September 27 |September 18 | | | 5 yr in 10 earlier than-- | October 26 | October 9 |September 28 | | | ------------------------------------------------------------------------ FROST Station : ST IGNATIUS, MT7286 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 2, 28 deg = 2, 32 deg = 2 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 28, 28 deg = 28, 32 deg = 28 Fall: Years of missing data 24 deg = 0, 28 deg = 0, 32 deg = 0 Years with no occurrence 24 deg = 0, 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-- | May 2 | May 19 | June 4 | | | 2 year in 10 later than-- | April 26 | May 14 | May 30 | | | 5 year in 10 later than-- | April 16 | May 6 | May 22 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- |September 23 |September 16 |September 2 | | | 2 yr in 10 earlier than-- |September 30 |September 21 |September 7 | | | 5 yr in 10 earlier than-- | October 12 | October 1 |September 17 | | | ------------------------------------------------------------------------ FROST Station : SWAN LAKE, MT8087 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 28 Spring: Years of missing data 24 deg = 5, 28 deg = 3, 32 deg = 3 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 25, 28 deg = 27, 32 deg = 27 Fall: Years of missing data 24 deg = 7, 28 deg = 7, 32 deg = 6 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 23, 28 deg = 23, 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 21 | June 18 | July 11 | | | 2 year in 10 later than-- | May 15 | June 10 | July 3 | | | 5 year in 10 later than-- | May 3 | May 26 | June 18 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- |September 12 |September 5 | August 16 | | | 2 yr in 10 earlier than-- |September 18 |September 9 | August 21 | | | 5 yr in 10 earlier than-- |September 29 |September 16 | August 31 | | | ------------------------------------------------------------------------ FROST Station : BIGFORK 13 S, MT0755 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 10, 28 deg = 10, 32 deg = 7 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 20, 28 deg = 20, 32 deg = 23 Fall: Years of missing data 24 deg = 12, 28 deg = 11, 32 deg = 10 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 18, 28 deg = 19, 32 deg = 20 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | April 18 | May 2 | May 20 | | | 2 year in 10 later than-- | April 11 | April 27 | May 16 | | | 5 year in 10 later than-- | March 29 | April 19 | May 9 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 2 |September 25 |September 13 | | | 2 yr in 10 earlier than-- | October 12 | October 4 |September 18 | | | 5 yr in 10 earlier than-- | November 1 | October 20 |September 29 | | | ------------------------------------------------------------------------ FROST Station : POLSON, MT6635 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 25 Spring: Years of missing data 24 deg = 10, 28 deg = 9, 32 deg = 9 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 20, 28 deg = 21, 32 deg = 21 Fall: Years of missing data 24 deg = 10, 28 deg = 10, 32 deg = 10 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 20, 28 deg = 20, 32 deg = 20 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | April 29 | May 10 | May 22 | | | 2 year in 10 later than-- | April 20 | May 5 | May 17 | | | 5 year in 10 later than-- | April 2 | April 26 | May 9 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 4 |September 22 |September 12 | | | 2 yr in 10 earlier than-- | October 11 |September 28 |September 16 | | | 5 yr in 10 earlier than-- | October 25 | October 11 |September 26 | | | ------------------------------------------------------------------------ FROST Station : POLSON KERR DAM, MT6640 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 2, 28 deg = 2, 32 deg = 1 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 28, 28 deg = 28, 32 deg = 29 Fall: Years of missing data 24 deg = 0, 28 deg = 0, 32 deg = 0 Years with no occurrence 24 deg = 0, 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-- | April 23 | May 10 | May 29 | | | 2 year in 10 later than-- | April 17 | May 4 | May 24 | | | 5 year in 10 later than-- | April 5 | April 24 | May 14 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 8 |September 21 |September 13 | | | 2 yr in 10 earlier than-- | October 14 |September 27 |September 18 | | | 5 yr in 10 earlier than-- | October 26 | October 9 |September 28 | | | ------------------------------------------------------------------------ FROST Station : ST IGNATIUS, MT7286 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 2, 28 deg = 2, 32 deg = 2 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 28, 28 deg = 28, 32 deg = 28 Fall: Years of missing data 24 deg = 0, 28 deg = 0, 32 deg = 0 Years with no occurrence 24 deg = 0, 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-- | May 2 | May 19 | June 4 | | | 2 year in 10 later than-- | April 26 | May 14 | May 30 | | | 5 year in 10 later than-- | April 16 | May 6 | May 22 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- |September 23 |September 16 |September 2 | | | 2 yr in 10 earlier than-- |September 30 |September 21 |September 7 | | | 5 yr in 10 earlier than-- | October 12 | October 1 |September 17 | | | ------------------------------------------------------------------------ FROST Station : SWAN LAKE, MT8087 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 28 Spring: Years of missing data 24 deg = 5, 28 deg = 3, 32 deg = 3 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 25, 28 deg = 27, 32 deg = 27 Fall: Years of missing data 24 deg = 7, 28 deg = 7, 32 deg = 6 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 23, 28 deg = 23, 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 21 | June 18 | July 11 | | | 2 year in 10 later than-- | May 15 | June 10 | July 3 | | | 5 year in 10 later than-- | May 3 | May 26 | June 18 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- |September 12 |September 5 | August 16 | | | 2 yr in 10 earlier than-- |September 18 |September 9 | August 21 | | | 5 yr in 10 earlier than-- |September 29 |September 16 | August 31 | | | ------------------------------------------------------------------------