The GPM Ground Validation Iowa Flood Center (IFC) NEXRAD Composite IFloodS dataset contains rain rate estimates derived using NEXt Generation Weather RADar system (NEXRAD) radars in operation during the Iowa Flood Studies (IFloodS) field campaign, in support of Global Precipitation Measurement (GPM) ground validation. NEXRAD is a network of 160 stationary S-Band radars dispersed throughout the United States and select locations abroad. Data were gathered in the vicinity of the IFloodS field campaign which took place in Iowa and surrounding areas during April 19, 2013 through June 30, 2013. This NEXRAD Composite data product is available in netCDF-4 or ASCII format with associated reflectivity browse imagery available in GIF format.