Although the heaviest rainfall over the past week was in the southern United States, flooding was reported in states from Louisiana to northern New York. The rainfall analysis above was made by merging precipitation data from multiple satellites. This Multisatellite Precipitation Analysis (TMPA) analysis used data products that were calibrated with TRMM precipitation data. These data products are calculated and stored at Goddard Space Flight center and are available within a few hours after being received by satellites. This analysis indicates that the greatest total rainfall for the past week

The TRMM satellite flew over tornadic thunderstorms for the second time in less than a week on 9 March 2011 at 1208 UTC ( 6:08 AM CST). By 1652Z (10:52 AM CST) NOAA had received 9 tornado sighting over Louisiana, Alabama and Florida. A precipitation analysis from TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) (in the lighter swath) again showed extremely heavy rainfall near tornadic activity. TRMM's Precipitation Radar (PR) data were used in the image on the upper right to show a 3-D slice through a possible tornado.