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URL to download GFS initial data and boundary condition

winash12 said:
Hello,
Newbie here. I need a URL where I can download GFS data for initial and boundary conditions. I go here - Index of /pub/data/nccf/com/gfs/prod/gfs.20241128/00/atmos but I am not sure what files to download. I have used python to download the 0.25x0.25 file from AWS but not sure how to download the IC and BC file here.

Best regards,
Ashwin.
Click to expand...
Are you wanting forecast data that's current or archived data from the past?
 
gfs.t00z.pgrb2.0p25.f000

gfs = model
t00z = utc of model start time
pgrb2 = grib2 type
0p25 = .25 degree resolution (p50 .50 deg and 1p00 is 1 degree resolution)
f000 = forecast time from model start time

so f000 is the first data file after the analysis so t = 0
f072 would be the 72hr after forecast time

I personally download them through a bash script that grabs every 3rd hour so f000 f003 etc etc

Does that help @winash12 ?
 
Will - it does most definitely help ! Yes I was planning to use FTP to download it. So if my understanding is correct the initial and boundary conditions are part of the same GRIB file ?
 
winash12 said:
Will - it does most definitely help ! Yes I was planning to use FTP to download it. So if my understanding is correct the initial and boundary conditions are part of the same GRIB file ?
Click to expand...
If you are using Linux there are two commands wget and curl that could run inside a script that will download the files. Just point them to the links and it will download them. Assuming you can write a simple script for it.
I've found ftp is sometimes a little slower to download the data then using wget or curl.
 
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