000 FTUS41 KBUF 161220 RRA TAFART TAF KART 161220Z 1612/1712 19003KT P6SM SKC FM161500 33005KT P6SM SKC FM161700 29008KT P6SM SKC FM162300 34005KT P6SM FEW140 FM170300 05004KT P6SM FEW250=