wrfinput in warm simulations

[Sara B]

Dear WRF-Hydro users, 

I would like to ask you some clarifications about the usage of the wrfinput file in case of warm simulations with WRF-Hydro.

I am using WRF-Hydro to produce hydrological forecasts. WRF-Hydro is forced by WRF forecasts (FORC_TYP = 3) and starts every day with the restart files (RESTART.*_DOMAIN4 and HYDRO_RST.*_DOMAIN4) produced the day before (warm start).

From the documentation, I read that wrfinput is always required by WRF-Hydro to run, also in the case of warm start. However, I could not find which variables exactly are used from the wrfinput file (all variables or only a selection). Therefore, in order to generate forecasts, WRF-Hydro uses every day the wrfinput file produced by WRF on that day with real.exe. Now, I am wondering if I am doing something useless...

I would like to know if I could always use every day the same wrfinput or if it is important to have every day the initial conditions of the considered day (as I am doing now). I guess that the key point is to know if WRF-Hydro (for warm starts) uses only the static variables or also the dynamic variables (such as soil moisture and temperature) from the wrfinput file.

Thank you very much!

Best regards,

Sara B