Dear Authors,
your manuscript entitled "Regional landslide forecasting in Piemonte (Italy) and in Norway: experiences from 2013 late spring" was reviewed by three independent referees.
All three have considered your manuscript interesting and publishable after major revisions. They highlighted some issues, concerning both the structure and the contents of the paper. They made several - shareable - comments and suggestions, which might increase the quality of your work. On the other hand, your point by point replies were detailed and appreciated.
Overall, my opinion is that that your work fits the topic of the special issue, has potential, and worths to be published. Therefore, I have decided that it can be reconsidered for publication after major revisions, following the suggestions made by the reviewers.
In preparing the revised version of your work, please highlight/make visible all the changes you made.
The manuscript will be checked again by referees and me before proceeding for publication.
Thank you.

Sincerely,
Stefano Luigi Gariano
NHESS Guest Editor

Dear Davide Tiranti and co-authors,

the second check made by two reviewers highlighted that you have improved considerably your article, as to being acceptable for publication.
However, they provided few comments and some corrections, useful for a final amelioration of your work. Moreover, in the following, I list some other technical corrections, mostly regarding tables and figures, proposed by myself.
After addressing these corrections, your manuscript will be briefly checked again by me and then will proceed to proofreading for the final publication in NHESS journal, in the selected Special Issue.

Best regards.

Sincerely,
Stefano Luigi Gariano
NHESS Guest Editor



Technical corrections

Figure 1B: Please check the legend of slope. I suggest using non-overlapping classes instead of limits. As an example, if a pixel has a slope equal to 10 degrees, it is in the second or in the third class? The same for values equal to 20, 30, 40, and 50.

Figure 1C: Please check the legend of shallow landslide density. I suggest using non-overlapping classes for values higher than 5. Please check the unit of measurement.

Figure 2: Please correect the legend by using non-overlapping classes instead of (upper or lower?) limits.

Figure 4: Please correct the legend by using non-overlapping classes and including or excluding uppper and lower limits. Please change "Annual mean precipitation" into "Mean annual precipitation" or "MAP". Also in the caption please change "Annual Precipitation Map" into "Mean Annual Precipitation".

Figure 8: Please check the legend. I suggest using non-overlapping classes.

Figure 9: Please check the legend. The measuring resolution is of the order of 1 mm?

Figure 12: Please correct "km2" in the legend, by using superscript.

Figure 17: I suggest adding a legend.

Figures 1, 3, 5, 6, 8, 11, 13, 14, 16: These figures have a low quality in the pdf file. Probably, this is due to the compression process. However, I suggest checking the readability of all figures, in particular regarding labels and legends.

Table 1. I suggest using always two columns also for equal values, e.g. for "Operative (daily)", "Rainfall and snowmelt", and "4".

I suggest correct “rainfalls” by using “rainfall” (uncountable) everywhere in the text.

Please use the abbreviation "Fig." when it appears in running text or in brackets, unless it comes at the beginning of a sentence (see https://www.natural-hazards-and-earth-system-sciences.net/for_authors/manuscript_preparation.html).
Please do not use abbreviations for Table.

Please add DOI to each reference in the list, where available. Please check the style of the reference list, following the Copernicus guidelines (https://www.natural-hazards-and-earth-system-sciences.net/Copernicus_Publications_Reference_Types.pdf)

Dear Authors,

thank you for having addressed all the further comments and suggestion made by reviewers and me. In my opinion, your manuscript is improved considerably during the review process and now it is worth to be published in NHESS journal.
Therefore, I'm pleased to inform you that your manuscript is accepted for publication in the selected special issue.

Best regards,
Stefano Luigi Gariano
NHESS Guest Editor