FTUS41 KLWX 161139
TAFIAD
TAF
KIAD 161139Z 1612/1718 16004KT P6SM BKN250
     FM161600 21012G18KT P6SM SCT060
     FM170000 24008KT P6SM FEW080
     FM170400 29008KT P6SM BKN080
     FM171600 31011KT P6SM SCT250=