737 FTUS41 KBUF 031120 TAFIAG TAF KIAG 031120Z 0312/0412 VRB03KT 4SM BR SCT020 TEMPO 0312/0313 2SM BR BKN025 FM031400 12005KT P6SM BKN045 FM032300 19011KT P6SM SCT250 FM040300 21015KT P6SM BKN070 FM040600 22020G28KT 6SM -SHRA BKN040 FM041100 27014G24KT P6SM SCT035=