ИСТИНА

The HSS-CME interactions can lead to the large errors in the forecasts of the arrival time HSS and the amplitude of the HSS speed, as well as to the absence of the expected CIR. We investigated the cases of possible HSS-CME interactions in the 24th solar cycle. The changes in the HSS parameters at 1 AU, such as kinematics, magnetic field and ion composition, were examined. In the cases of HSS-CME interactions we determined the degree of discrepancy between the observed at 1 AU and forecasted parameters. We used WSA-ENLIL model and the empirical solar wind forecast model based on areas and magnetic fields of coronal holes. We investigated how the detected discrepancy depends on the relative location, magnetic configuration of the solar sources of HSS and CME.