000 FTUS41 KBUF 161220 RRA TAFIAG TAF KIAG 161220Z 1612/1712 VRB03KT P6SM FEW070 FM161700 33006KT P6SM SKC FM170100 07005KT P6SM FEW250 FM170800 08010G18KT P6SM SCT250 FM171100 08013G22KT P6SM BKN120=