FROST Station : GRATERFORD 1 E, PA3437 Start yr. - 1961 End yr. - 1990 Requested years of data: 30 Available years of data: 30 Spring: Years of missing data 24 deg = 5, 28 deg = 4, 32 deg = 3 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 25, 28 deg = 26, 32 deg = 27 Fall: Years of missing data 24 deg = 6, 28 deg = 5, 32 deg = 4 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 24, 28 deg = 25, 32 deg = 26 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | April 12 | May 7 | May 19 | | | 2 year in 10 later than-- | April 7 | April 29 | May 12 | | | 5 year in 10 later than-- | March 28 | April 15 | April 28 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 7 |September 27 |September 19 | | | 2 yr in 10 earlier than-- | October 16 | October 5 |September 26 | | | 5 yr in 10 earlier than-- | November 2 | October 20 | October 9 | | | ------------------------------------------------------------------------ FROST Station : NORRISTOWN, PA6370 Start yr. - 1961 End yr. - 1987 Requested years of data: 27 Available years of data: 26 Spring: Years of missing data 24 deg = 5, 28 deg = 5, 32 deg = 3 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 22, 28 deg = 22, 32 deg = 24 Fall: 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 = 24, 28 deg = 25, 32 deg = 25 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | April 2 | April 29 | May 5 | | | 2 year in 10 later than-- | March 28 | April 20 | April 28 | | | 5 year in 10 later than-- | March 20 | April 3 | April 14 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | November 13 | October 24 | October 12 | | | 2 yr in 10 earlier than-- | November 17 | October 30 | October 17 | | | 5 yr in 10 earlier than-- | November 26 | November 11 | October 27 | | | ------------------------------------------------------------------------