The ability of Harvey to maintain tropical storm strength over southeast Texas for over 3 days after landfall while producing historical rainfall and flooding prompts questions about the role of the underlying land surface condition in Harvey's structural evolution, maintenance, and focus of precipitation. The aim of this presentation is to combine NASA satellite and reanalysis products with a suite of high-resolution Weather Research and Forecasting (WRF) model simulations to address three science questions: 1) How did the soil moisture and precipitation evolve as Harvey made landfall and remained nearly stationary for 84 hours? 2) How did the heterogeneously evolving soil moisture/land surface conditions influence the physical processes that drive heavy precipitation? 3) What influence did the evolving underlying soil moisture conditions have on Harvey's intensity after landfall? Preliminary results show that soil moisture dramatically increased within ~100 km of the Texas coastline in the 84 hours subsequent to Harvey's landfall. The suite of WRF simulations will specifically test the sensitivity of Harvey's intensity and rainfall production to the underlying soil moisture condition utilizing moisture and vorticity budget diagnostics.