000 FTUS41 KRNK 170520 TAFBLF TAF KBLF 170520Z 1706/1806 22004KT P6SM OVC250 FM171600 23010G18KT P6SM VCSH BKN100 FM172000 24010G22KT P6SM OVC100 FM180400 26012G22KT P6SM OVC050=