000 FTUS41 KBTV 171720 TAFBTV TAF KBTV 171720Z 1718/1818 34009KT P6SM SCT250 FM180300 11005KT P6SM OVC230 FM180600 14008G19KT P6SM BKN090 FM181000 15012G26KT P6SM VCSH BKN060 FM181400 17011G24KT P6SM -SHRA OVC045=