The manuscript “An intercomparison of approaches for improving predictability in operational seasonal streamflow forecasting” by Mendoza et al. was reviewed by two experts in the field of seasonal hydro-climatic forecasting.

Overall, this is very interesting investigation and a very nicely written manuscript. The two referees (including also myself after a personal evaluation) are very much in favor of publishing the manuscript in HESS after some minor revisions. Reading the authors’ responses to the referees, I believe that the intended revisions are adequate, and the planned changes will address the reviewers' comments satisfactorily. I therefore invite the authors to submit a revised manuscript, which will be further reviewed by the Editor.

Best regards,
Ilias Pechlivanidis

The article 'An intercomparison of approaches for improving operational seasonal streamflow forecasts' by Mendoza et al., has been subject to minor corrections and with a further review by the Editor. As mentioned in my preliminary evaluation of the investigation and also after receiving the referees' comments, this article meets the high standards of HESS and deserves a publication. At this stage, I personally reviewed the manuscript and I can state that the authors satisfactorily addressed all the comments made my the referees. I am therefore more than happy to accept this article for publication.