This detailed investigation of the rainfall associated with Hurricane Harvey was utilized as input to hydrologic modeling for two large flood storage reservoirs operated by the US Army Corps of Engineers near Houston. AWA’s information proved detailed, gridded rainfall accumulation data at 5-moute time steps and the annual exceedance probability of those accumulations over various times scales on the same grid locations. This information helped quantify the rarity of the rainfall, understand the timing of the rainfall for rain-runoff simulations in relation to operating decisions applied to avert flooding. This information was provided to support the legal defense and arguments. AWA testified in a court of law in support of the defense and all testimony were accepted and considered in the case outcomes.