• http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_archive+2006032300/2d/6h
• http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_archive+2006012400/10d/6h
• http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_archive+2006032800/15d/6h
• http://www.atmos.washington.edu/~ovens/loops/wxloop.cgi?npole_h500_xtnd+///