000 FTUS42 KCHS 172320 TAFSAV TAF KSAV 172320Z 1800/1824 18012KT P6SM BKN200 FM180300 19006KT P6SM SCT150 BKN250 FM181200 25007KT P6SM SCT120 BKN200 FM182100 20009KT P6SM SCT100 SCT200=