000 FTUS41 KBTV 171720 TAFSLK TAF KSLK 171720Z 1718/1818 05008KT P6SM BKN250 FM180200 08006KT P6SM OVC080 FM180700 10006KT P6SM VCSH OVC050 FM181000 12009G18KT P6SM -SHRA OVC040 FM181600 16010G22KT P6SM -SHRA OVC035=