A case of explosive development for a marine cyclone near the U.S. West Coast on 13 February 2001 was poorly handled by most of the operational global and mesoscale models. Analysis by Touchton (2002) of satellite imagery and of observations taken during the PACJET field experiment suggests convection played a significant role in the development of the cyclone. Recent results by Nuss and Miller (2003) based on numerical simulations of this cyclone demonstrate the decreased storm intensification when mesoscale convective cells are located such that their integrated effect is to decrease the amplitude of the upper-level trough. This study will utilize observations taken during PACJET to improve the location of mesoscale convection relative to the developing storm in order to examine the maximum potential improvement in the simulated deepening rate.