hms-commander

hms-commander does for HEC-HMS what its sibling ras-commander does for HEC-RAS: programmatic project management, single/batch/parallel simulation execution, design-storm generation (Atlas 14, frequency and SCS types), results extraction, and the DSS operations that hand HMS hydrographs to RAS as boundary conditions — plus terrain/GIS helpers with TauDEM integration.

Maintained by William Katzenmeyer (CLB Engineering), it is marked beta and expects engineering oversight, but it fills a real gap: HMS automation historically meant hand-rolled Jython inside the HMS console, and this brings it into ordinary Python where the rest of your workflow lives.