GHRC DAAC staff have completed their evaluation of Phase 1 of the Cumulus Cloud Prototype for data ingest, archive, distribution and management. GHRC data and processes from the Hurricane and Severe Storm Sentinel (HS3) mission were successfully implemented as the first Cumulus use case. GHRC staff ran the data ingest/process/archive/publish workflows implemented and demonstrated by Cumulus developers, with minor variations in order to examine configurability and robustness of the prototype. While the tests were largely successful, they required considerable support from the development team to investigate and resolve issues encountered. The challenge for future phases of Cumulus will be to make the system more usable and configurable for DAAC staff.