I know there is software like wgrib2 that will convert grib and grib2 format files to NetCDF, but I need to go the other way, from NetCDF to grib2, because the local. Jun 04, 2012 Before I start the 'tutorial. Convert a message from GRIB1 to GRIB2, because degrib currently doesn't have a mapping of the GRIB1 meta data to GRIB2.

Search field for local site information. Press Enter or select the go button to submit request Search NCEP Current Hazards Current Conditions Environmental Models Forecasts Climate Weather Safety NOAA About Us Contact Us >>>>GRIB2 Transition TRANSITION TO GRIB2 ON NCEP AND NWS FTP SERVERS Updated: 2/12/2008 The deadline for transitioning from grib1 to grib2 is January 28 2008. The majority of grib1 data sets will no longer be populated after that date. Equivalent grib2 data sets are now available on the NCEP and NWS ftp servers The exceptions to the conversion are listed below with their appropriate directories and filenames. No other GRIB1 datasets will continue to be populated.

If you would like to continue using data in GRIB1 format, NCEP Central Operations maintains the GRIB2 to GRIB1 conversion utility cnvgrib which can help through this transition. Documentation and source code is available on the. If a grib2 data set is not available, please inform the PMB Data Flow Helpdesk at: NCEP.PMB.Dataflow@noaa.gov Please direct all questions concerning the software codes to the NCO PMB Dataflow Helpdesk: NCEP.PMB.Dataflow@noaa.gov Below are tables describing GRIB1 model output files and the GRIB2 equivalents available on tgftp.ncep.noaa.gov and ftpprd.ncep.noaa.gov. NWS FTP SERVER (tgftp.nws.noaa.gov) ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/ GRIB2 file names on the NWS ftp server will remain the same as the GRIB1 file names, but the GRIB2 files are stored in new uniquely named subdirectories. However, the GFS 1.0 deg files are an exception; the GRIB2 version will be named fh.HHHH_tl.press_gr.1p0deg instead of fh.HHHH_tl.press_gr.onedeg. This is to improve continuity of the names of GFS model output for all resolutions (0.5, 1.0, and 2.5 deg).

GRIB1 Directory GRIB2 Directory Parent Directory: SL.us008001/ST.opnl/ SL.us008001/ST.opnl/ Subdirectories: MT.ensg_CY. Celestion S10 Subwoofer Manuals. /RD./PT.grid_DF.gr1_RE.high MT.ensg_CY./RD./PT.grid_DF. Gr2_RE.high MT.ensg_CY./RD./PT.grid_DF.gr1_RE.low MT.ensg_CY./RD./PT.grid_DF. Gr2_RE.low MT.gdas_CY./RD./PT.grid_DF.gr1 MT.gdas_CY./RD./PT.grid_DF. Gr2 MT.gfs_CY./RD./PT.grid_DF.gr1 MT.gfs_CY./RD./PT.grid_DF.

Gr2 MT.nam_AR.ak_CY./RD./PT.grid_DF.gr1 MT.nam_AR.ak_CY./RD./PT.grid_DF. Gr2 MT.nam_CY./RD./PT.grid_DF.gr1 MT.nam_CY./RD./PT.grid_DF. Gr2 MT.ngm_CY./RD./PT.grid_DF.gr1 MT.ngm_CY./RD./PT.grid_DF. Gr2 MT.rsas_CY./RD./PT.grid_DF.gr1 MT.rsas_CY./RD./PT.grid_DF. Gr2 MT.rsm_CY./RD./PT.grid_DF.gr1 MT.rsm_CY./RD./PT.grid_DF. Gr2 MT.ruc_CY./RD./PT.grid_DF.gr1 MT.ruc_CY./RD./PT.grid_DF. Gr2 MT.sref_CY./RD./PT.grid_DF.gr1 MT.sref_CY./RD./PT.grid_DF.

GRIB1 FILES WHICH WILL NOT BE REMOVED FROM ftpprd.ncep.noaa.gov MDL PRODUCTS ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs./mdl* CFS PRODUCTS ftp://ftpprd.ncep.noaa.gov/pub/data1/nccf/com/cfs/prod ICAO WAFS GRIDS ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/pcom/gfs ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs. Is cycle, is forecast hour, is sector [L,P] wafavn.tz.grb.f_ wafsgfs__tz_intdsk 5200 Auth Road Camp Springs, Maryland 20746 Page last modified: April 05, 2007.

Climate Prediction Center - wgrib2: converting MERRA HDF file to grib2 Search CPC Search About Us Contact Us >>>>wgrib2 - example converting MERRA HDF to grib2 wgrib2: Converting MERRA HDF file to GRIB-2 Introduction MERRA is a NASA reanalysis project that has created reanalyses in HDF format. For some people, grib is a more convenient format. Here is our first attempt to convert a MERRA HDF file into grib-2.

Surveying the situation we see that Lats or the simpler to use Lats4d can convert HDF into grib-1. Grib-1 can be converted into grib-2 by the cnvgrib utility except that lats creates a custom grib table. Therefore a program would have to be written that converts the grib-1 file with the custom grib table into a grib table using the standard NCEP table.

Doable but the program wouldn't be very generic. In addition the process would take 3 steps (convert to grib1, translate grib1, convert to grib2). Can we do better? Looking at the programs that can read HDF, we see a familiar face, GrADS. GrADS can read the HDF and write it out as a binary file. Wgrib2 can then read the binary file, a grib-2 template and metadata and then create a grib-2 file. 1: The template Grib-2 files include much metadata that is constant such as grid, center that created the data, the process that created the data, etc.

Making a template takes some knowledge and we'll assume it has already been done. For the MERRA template, I used copygb/cnvgrib to create a grib2 file with the proper grid definition and then used wgrib2 to fill in some of the metadata (center). Probably should have filled in more of the metadata but I didn't. 2: Writing the binary and meta data The script g2write takes three arguements, the GrADS variable/expression, the output file and some metadata (variable:level:forecast/analysis). The script then creates the binary and metadata for one or more grids depending whether t is varying.

These two files along with the template can be used to make a grib2 file. 3: All together • Start gradshdf. • open the HDF file, sdfopen hdf-file • run the script, merra2grb2.gs 4: What does merra2grb2 do? • set the grid. Grads often uses an extra column.