HEC-RAS now has the capability to have spatially varying precipitation, wind, and infiltration. Spatial precipitation and wind data are added into the Unsteady Flow Boundary Conditions editor. While infiltration information is defined as a spatial layer in HEC-RAS Mapper.
Spatial precipitation and wind data can be entered into HEC-RAS as either gridded data or point gage data. The spatial precipitation/wind data is added into HEC-RAS through the Unsteady Flow Boundary Conditions editor. When that editor is open, you will find a tab on the main window called "Meteorological Data".
NOTE: To learn how to enter and use spatial precipitation and/or wind data with HEC-RAS, please review the section called "Global Boundary Conditions" in the 2D Modeling User's Manual.