FROST Station : CHICAGO O'HARE WSO ARPT, IL1549 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 15 | April 23 | May 9 | | | 2 year in 10 later than-- | April 10 | April 19 | May 4 | | | 5 year in 10 later than-- | April 2 | April 11 | April 24 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 23 | October 8 |September 27 | | | 2 yr in 10 earlier than-- | October 29 | October 14 | October 2 | | | 5 yr in 10 earlier than-- | November 9 | October 26 | October 12 | | | ------------------------------------------------------------------------ FROST Station : CHICAGO UNIVERSITY, IL1572 Start yr. - 1971 End yr. - 1994 Requested years of data: 24 Available years of data: 24 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 = 24, 28 deg = 24, 32 deg = 24 Fall: 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 = 22, 28 deg = 22, 32 deg = 23 ------------------------------------------------------------------------ | Temperature ---------------------------|-------------------------------------------- Probability | 24F or lower | 28F or lower | 32F or lower | ---------------------------|--------------|--------------|-------------- | | | Last freezing temperature | | | in spring: | | | | | | 1 year in 10 later than-- | April 6 | April 12 | April 21 | | | 2 year in 10 later than-- | March 31 | April 8 | April 17 | | | 5 year in 10 later than-- | March 21 | April 1 | April 10 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | November 3 | October 28 | October 23 | | | 2 yr in 10 earlier than-- | November 8 | November 1 | October 26 | | | 5 yr in 10 earlier than-- | November 19 | November 8 | November 3 | | | ------------------------------------------------------------------------ FROST Station : CHICAGO MIDWAY AP 3 SW, IL1577 Start yr. - 1971 End yr. - 2000 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 = 0, 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 = 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 9 | April 20 | May 6 | | | 2 year in 10 later than-- | April 4 | April 15 | April 30 | | | 5 year in 10 later than-- | March 26 | April 6 | April 19 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 29 | October 19 | October 6 | | | 2 yr in 10 earlier than-- | November 4 | October 25 | October 12 | | | 5 yr in 10 earlier than-- | November 15 | November 4 | October 23 | | | ------------------------------------------------------------------------ FROST Station : CHICAGO O'HARE WSO ARPT, IL1549 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 15 | April 23 | May 9 | | | 2 year in 10 later than-- | April 10 | April 19 | May 4 | | | 5 year in 10 later than-- | April 2 | April 11 | April 24 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 23 | October 8 |September 27 | | | 2 yr in 10 earlier than-- | October 29 | October 14 | October 2 | | | 5 yr in 10 earlier than-- | November 9 | October 26 | October 12 | | | ------------------------------------------------------------------------ FROST Station : PARK FOREST, IL6616 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 = 2, 32 deg = 2 Years with no occurrence 24 deg = 0, 28 deg = 0, 32 deg = 0 Data years used 24 deg = 27, 28 deg = 28, 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-- | April 17 | April 25 | May 12 | | | 2 year in 10 later than-- | April 12 | April 21 | May 6 | | | 5 year in 10 later than-- | April 3 | April 12 | April 26 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | October 20 | October 10 |September 27 | | | 2 yr in 10 earlier than-- | October 26 | October 16 | October 2 | | | 5 yr in 10 earlier than-- | November 8 | October 28 | October 12 | | | ------------------------------------------------------------------------