Hello, ALL.

I am facing a challenge in HEC-HMS simulation using GRID rainfall. I have event-based large-area WRF netCDF4 data that contains all weather parameters in hourly intervals, and the rainfall (mm) variable is in cumulative form. HEC-HMS doesn’t accept cumulative, as you know, and I converted this cumulative rainfall data to each hour using RStudio (import WRF file—convert to raster format—import shapefile, which is from HMS basin delineation—project them to make the same CRS—mask to study area—convert to each/single hour—save back netCDF4 format).

Then, open HEC-HMS---import grid data wizard in HMS---select my new single-hour netCDF4 file---clipping data source (select previously used boundary shapefile for ----target WKT (set my CRS location). ---target cell size (selected based on WRF file)… resampling (bilinear/other) ---selected destination file---filled all DSS file pathnames properly, override unit (mm) and data type (per-cum), then open the saved DSS file in HEC-DSSVUE; it is opening, and the DSS data is correctly found.

The problem is that I call this saved DSS file to HMS, setting all as grid data acceptance, and finally run HMS; it is saying that “Missing precipitation set to zero for grid cells.” I tried adjusting all things from beginning to end to fix all these problems many times, but I couldn't. Please help me. How and what should I do? I attached the screenshot of the problem that HMS said.

Thank you very much.