GFS

This article is about GFS and is under construction

Global Forecasting System (GFS) files are packed under the GRIB protocol. There are two different types of GRIB files GRIB1 and GRIB2 files. They differ in the way and the software used to convert them into HDF5 mohid input files and normally the former can be found on the reanalysis solutions while the latter is the format used for forecast.

Reanalysis data in GRIB1 format can be collected from the NCEP FNL Operational Model Global Tropospheric Analyses, continuing from July 1999 found on this web address. To collect the data you must become a registered user http://dss.ucar.edu/datasets/ds083.2/

Forecasting data in GRIB2 format it is collected from the NOAA ftp site ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/ within this page it is located different folders, that are changing continuosly the name of the folder indicate the date and time when they were produced with the following meaning . In example, the folder named gfs.2009081406 is

Windows

GRIB1 files are first unpacked into ASCII or binary files with the help of WGRIB while GRIB2 are converted into ASCII, binary or NETCDF. Once our files are converted into ASCII text files they would be converted into HDF5 files through a Matlab code.