The present study further investigates the summertime minimum in precipitation off the Georgia and Carolina coasts. The goals are to verify and to extend the climatology in time and space with an independent satellite precipitation dataset, and to examine mechanisms for the summertime offshore rain minimum. Since the NMQ product is limited in coverage offshore to the Gulf Stream, we analyzed Tropical Rainfall Measuring Mission (TRMM) 3B-42 three-hourly precipitation data (0.25o spacing) for the period 1998-2014 to compare the seasonal to the four-year NMQ-NEXRAD climatology of Rickenbach et al. (2015). We will compare the composite diurnal and seasonal changes of TRMM precipitation to the NMQ-NEXRAD climatology. Then, we use National Centers of Environmental Prediction (NCEP) reanalysis data to analyze the diurnal and seasonal changes in kinematic and thermodynamic parameters, to evaluate the role of regional circulation features (land-ocean circulations modified by coastal shape, Gulf Stream thermally-induced circulations), as well as large-scale moisture advection determined by the strength and position of the North Atlantic subtropical high.