000 FTUS41 KBTV 172321 TAFBTV TAF KBTV 172321Z 1800/1824 31006KT P6SM OVC190 FM180500 13008KT P6SM OVC200 FM181200 16011G27KT P6SM VCSH OVC090 FM181700 17009G22KT P6SM -SHRA OVC040 FM181900 17009G20KT P6SM -SHRA OVC030=