FROST Station : SIOUX FALLS WSFO AP, SD7667 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 = 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 24 | May 8 | May 18 | | | 2 year in 10 later than-- | April 19 | May 4 | May 13 | | | 5 year in 10 later than-- | April 10 | April 25 | May 2 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 2 |September 22 |September 15 | | | 2 yr in 10 earlier than-- | October 7 |September 27 |September 19 | | | 5 yr in 10 earlier than-- | October 17 | October 6 |September 28 | | | ------------------------------------------------------------------------