FROST Station : PORCUPINE 16 NW, SD6736 Start yr. - 1971 End yr. - 2000 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 = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 30, 28 deg = 30, 32 deg = 30 Fall: Years of missing data 24 deg = 3, 28 deg = 3, 32 deg = 2 Years with no occurrence 24 deg = 0, 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-- | May 12 | May 19 | June 4 | | | 2 year in 10 later than-- | May 6 | May 14 | May 29 | | | 5 year in 10 later than-- | April 26 | May 4 | May 16 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- |September 15 |September 13 |September 7 | | | 2 yr in 10 earlier than-- |September 21 |September 18 |September 11 | | | 5 yr in 10 earlier than-- | October 2 |September 27 |September 17 | | | ------------------------------------------------------------------------