Running GFS-FNL for WRF

jbasconcillo

New member
For those who have tried using FNL in WRF:

1. May I know which GFS-FNL data should I select when I download via RDA?

2. Also, which time interval? Is the 6-hour forecast same as 6-hour analysis?
 

Ming Chen

Moderator
Staff member
I would recommend using GFS data, either forecasts or analysis should be fine. This is because GFS resolution is 0.25 degree, which is better than the NFL resolution that is half degree or one degree.

GFS forecast products are at 3-hour interval, while its analysis data is 6-hour interval. Frequent update of lateral boundary condition may yield better results. Based on this idea, I would recommend using GFS 3-hour interval data.
 

jbasconcillo

New member
I would recommend using GFS data, either forecasts or analysis should be fine. This is because GFS resolution is 0.25 degree, which is better than the NFL resolution that is half degree or one degree.

GFS forecast products are at 3-hour interval, while its analysis data is 6-hour interval. Frequent update of lateral boundary condition may yield better results. Based on this idea, I would recommend using GFS 3-hour interval data.
Thank you for your reply. Would you know which meteorological input data should I select in the RDA?

I have already selected:

Geopotential height
Landmask
ice cover
Pressure
Pressure reduced to MSL
Relative humidity
Specific humidity
U,V wind component
Temperature
Volumetric soil moisture content

Did I miss anything else?
 

Ming Chen

Moderator
Staff member
I don't think you should select each individual variables for download from RDA. Please download the entire global gfs datafile, then run ungrib.exe to process these data.
 
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