Encounters with significant turbulence, or simply “bumpiness” in flight, are a major concern not only for passenger comfort but also for safe, efficient, and cost-effective aircraft operations. This study is a case study and comparison of the report of air turbulence clearance of east and south east crossings (Sector 5 and 6) of the results of the the IRIAF IT, Communication and Electronic Administration. Regional weather predictions are carried out using an ensemble forecasting system development for the WRF model. Perturbed initial conditions and different choices of physical parameterizations are used to generate ensemble members. In addition, the initial and lateral boundary conditions are taken from the global forecast system (GFS). For each member of the ensemble system, two computational regions of the nesting area are used with spatial resolutions of 27,000 meters, 9,000 meters. Case study of the predicted clear air turbulence indicates the proper performance of the predicted meteorological parameters.