KBOS 170520Z 1706/1812 20007KT P6SM SCT008 BKN015 
  FM171100 20007KT P6SM BKN020 
  FM171400 20011G17KT P6SM SCT070 
  PROB30 1714/1719 -SHRA BKN045 
  FM171900 21012G22KT P6SM SCT070