This is the peer reviewed version of the following article: Maneta MP, Soulsby C, Kuppel S, Tetzlaff D. Conceptualizing catchment storage dynamics and nonlinearities. Hydrological Processes. 2018;32:3299–3303., which has been published in final form at https://doi.org/10.1002/hyp.13262. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.