The NAM @ 60 Hours http://mag.ncep.noaa.gov/GemPakTier/MagGemPakImages/nam/20110902/00/nam_wnatl_060_10m_wnd_precip.gif
According to this run on the NAM, NOLA will get pounded with rain and storms for 18 hours or mor straight. I hope their new pumps are working!