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Chris, The VORWND name is the internam name that gempak creates when it performes the calculation (and will use that as the title, unless you give it a more descriptive TITLE. The problem I believe you have is that you have SCALE=0 while vorticity values are typically on the order of 10^-5. I suggest you set SCALE=999 or SCALE= , rather than SCALE=0 so that gempak will appropriately scale the data values for CINT to contour. With SCALE=0, you probably have vcalues like MAX=0.00020 MIN=-0.00010, so the output just shows 0.00. Steve Chiswell Unidata User Support >From: address@hidden (Chris Hennon) >Organization: UCAR/Unidata >Keywords: 200008102005.e7AK5YT16451 >Steve - > >I'm trying to produce a relative vorticity map. In my gempak grid file >(vorticity.grd) I have these two grids: > >289 950812/0000 850 PRES UWND >290 950812/0000 850 PRES VWND > >My GDCNTR input looks like: > > GDATTIM Grid date/time 950812/0000 > GLEVEL Grid level 850 > GVCORD Grid vertical coordinate PRES > GFUNC Scalar grid vor(wnd) > GDFILE Grid file vorticity.grd > >etc..... > >When I run it, gempak interprets vor(wnd) as the parm VORWND and therefore >doesn't plot anything: > > GEMPAK-GDCNTR>r > > Grid file: vorticity.grd > > GRID IDENTIFIER: > TIME1 TIME2 LEVL1 LEVL2 VCORD PARM >950812/0000 850 PRES VORWND > > GAREA: dset >SCALE: 0 > > MINIMUM AND MAXIMUM VALUES 0.00 0.00 > > >Am I doing something obviously wrong? Thanks. > >Chris > > >================================================ >| Chris Hennon Ohio State University | >| Tropical Meteorology address@hidden | >| | >| Dept of Geography Office: 1155 Derby Hall | >| 1036 Derby Hall Phone : (614) 292-2704 | >| Columbus, OH 43210 Fax : (614) 292-6213 | >================================================ >