IOPs were set up to directly observe the outflows of both Marty and Joaquin during the 2015 TCI field campaign. Using these high frequency HDSS soundings of the outflow and storm cores of both storms, the outflow channels of these storms are compared to each other to determine if they are placing outflow into the same isentropic levels and the potential vorticity characteristics of each outflow channel. Numerical simulations of Marty and Joaquin will be fitted with massless tracers released at the surface and proportional to surface energy flux to track the entropy and potential vorticity plumes of each storm and depict their predicted interaction. The relationship of any predicted interactions to weakened outflow resistance associated with low potential vorticity anomalies will be sought. Observational evidence of their actual interaction will then be gathered from the TCI observations potential vorticity in both the storm outflow and surrounding environment. Our hypothesis is that a low potential vorticity environment existed near the developing Joaquin that was built by the outflow of Marty and which boosted the development of Joaquin. Results of this study will be presented at the oral presentation.