jet streams may deflect the air masses moved by the prevailing westerlies
regurgitant_jet is flowing. jet_of_water is jet. jet_stream is prevailing_wind. stream is motion. westerlies is prevailing_wind. jet_stream is airstream. jet_of_water is water. stream is small_body_of_flowing_water. stream is narrow_body_of_flowing_water. one_type_of_stream is jet_stream.