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Forecast Data

Posted: October 10th, 2017, 10:00 am
by Smaug
Hi,

The NOAA FTP server provides GFS data at 0.5 spatial resolution. These files are however to large and I am looking for current forecast data that is compatible with HYSPLIT and ideally at 1 degree resolution. Does the NOAA FTP server provide such forecast data?

Kind Regards

Re: Forecast Data

Posted: October 10th, 2017, 11:46 am
by glenn.rolph
The 1 degree GFS forecast files can be downloaded from the NOAA NCEP FTP server at:

http://ftpprd.ncep.noaa.gov/data/nccf/c ... .YYYYMMDD/ where YYYYMMDD is the current year month and day. The file names of the 1 degree GFS are: hysplit.tXXz.gfsf where XX is the forecast cycle (00, 06, 12, 18).

Re: Forecast Data

Posted: October 11th, 2017, 10:49 am
by Smaug
Hi,

I have checked the link and it seems there are no files for future times. The file at hysplit.t06z.gfsf for 11th October is the most recent file.

Each file is also around 700MB for a 6 hour forecast. This results in roughly 2.84GB for a single day. The 0.25 GFS degree resolution is 2.1GB per day.

I'm I missing something?

Thanks

Re: Forecast Data

Posted: October 11th, 2017, 11:52 am
by glenn.rolph
These files are not GRIB files, but rather these are ARL HYSPLIT formatted files that contain all the forecast hours. These files can be downloaded and used by HYSPLIT directly without having to convert them from GRIB to ARL HYSPLIT format.