This study addresses the problem of the role of CCEKWs on EWs over the Intra Americas Seas (IAS) and the tropical eastern Pacific. For this objective, regression analysis of CCEKWs show their impacts on dynamical and thermodynamical environment over the region. After this, a methodology for finding EWs generated during the passage of CCEKWs is formulated based on convective and dynamical features of both modes of variability. Results show that the thermodynamical environment is not affected, while the dynamical fields show an impact of the westerlies associated to the CCEKWs on EWs. Finally, further analysis show that the Kelvin waves associated with genesis of EWs are modulated by the presence of the MJO on the eastern Pacific.