FROST Station : NORFOLK WSO AP, VA6139 Start yr. - 1961 End yr. - 1990 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 = 1, 28 deg = 1, 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-- | March 5 | March 24 | April 9 | | | 2 year in 10 later than-- | March 1 | March 19 | April 3 | | | 5 year in 10 later than-- | February 18 | March 8 | March 23 | | | First freezing temperature | | | in fall: | | | | | | 1 yr in 10 earlier than-- | November 26 | November 16 | November 2 | | | 2 yr in 10 earlier than-- | December 3 | November 21 | November 8 | | | 5 yr in 10 earlier than-- | December 16 | December 1 | November 19 | | | ------------------------------------------------------------------------