WRF - Developmental Testbed Center

The g1print.exe program takes as its only command-line argument the name of a GRIBEdition 1 file. The program prints a listing of the fields, levels, and dates of the data inthe file.F. g2print.exeSimilar to g1print.exe, the g2print.exe program takes as its only command-line argumentthe name of a GRIB Edition 2 file. The program prints a listing of the fields, levels, anddates of the data in the file.G. plotfmt.exeThe plotfmt.exe is an NCAR Graphics program that plots the contents of an intermediateformat file. The program takes as its only command-line argument the name of the file toplot, and produces an NCAR Graphics metafile, which contains contour plots of eachfield in input file. The graphics metafile output, gmeta, may be viewed with the idtcommand, or converted to another format using utilities such as ctrans.H. rd_intermediate.exeGiven the name of a singe intermediate format file on the command line, therd_intermediate.exe program prints information about the fields contained in the file.WRF Domain WizardWRF Domain Wizard is a graphical user interface (GUI) which interacts with the WPSand enables users to easily define domains, create a namelist.wps and run geogrid,ungrib, and metgrid. A helpful online tutorial can be found at:http://wrfportal.org/DomainWizard.html.Writing Meteorological Data to the Intermediate FormatThe role of the ungrib program is to decode GRIB data sets into a simple intermediateformat that is understood by metgrid. If meteorological data are not available in GRIBEdition 1 or GRIB Edition 2 formats, the user is responsible for writing such data into theintermediate file format. Fortunately, the intermediate format is relatively simple,consisting of a sequence of unformatted Fortran writes. It is important to note that theseunformatted writes use big-endian byte order, which can typically be specified withcompiler flags. Below, we describe the WPS intermediate format; users interested in theSI or MM5 intermediate formats can first gain familiarity with the WPS format, which isvery similar, and later examine the Fortran subroutines that read and write all threeWRF-NMM V3: User’s Guide 3-24