Release Notes

The release notes for HEC-HMS 4.12 can be found here.

New Features

  • Improved terrain data management
  • New infiltration method (generates excess runoff even when subbasin is not saturated)
  • New options for setting initial snow state variables
  • Variable ModClark option
  • "Default Values" and "Constant Value" are available for initializing gridded temperature index snow method 

Known Issues

The status of issues since the CWMS 3.3.1 release can be found here. 

The known issues as of the CWMS 3.4 release can be found here.

Fixed Bugs

Key bug fixes to highlight include:

  • No longer a slow down when re-running a forecast many times
  • Improved results tracking when editing HEC-HMS forecast parameters from CAVI
  • Intermittent issues when closing and opening forecasts
  • Some time-series, paired, and grid data were not being copied from the watershed to forecast directory when a new forecast was created