Get the parallel NAM-12 analysis maps for the previous 7 days here (link opens a new window):

Mon 08/24 Tue 08/25 Wed 08/26 Thu 08/27 Fri 08/28 Sat 08/29 Sun 08/30 Mon 08/31
00z 00z 00z 00z 00z 00z 00z
12z 12z 12z 12z 12z 12z 12z