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Forecasting using WRF ARW

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New member
Hello everyone!
I am using WRF ARW for forecasting purpose, I am using GFS grib data for the next 48 hours forecasting, the problem I am facing is that I have downloaded data from 2018-01-01_00:00:00 to 2018-01-04_00:00:00, but when I run ungrib exe, error appears that data for 2018-01-01_00:00:00 is missing although I have downloaded data for that time.
Thanks in advance
P.S here is the link for the grib data
I am sorry to answer late. I am not sure whether you have solve this issue. If not, please try to download GFS data from

then try again.
Thank you for replying. I have upgraded my WRF to 4.1, after that my Forecasting grib data does not show error my I execute ungribe exe, But I have a question after the simulation is complete how post-process is done? i.e in NCL, ARWpost, or python?
We provide several point process packages, including NCL, RIP, ARWpost, UPP, etc. Please take a look at the website here for more details: