000 FTUS41 KLWX 180540 TAFIAD TAF KIAD 180540Z 1806/1912 33010KT P6SM FEW030 SCT100 FM180700 27004KT P6SM SCT100 FM181500 32008G16KT P6SM SCT045 FM182200 35008KT P6SM SCT250 FM190600 09006KT P6SM BKN025 FM190800 11005KT P6SM BKN008=