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Pete, Yes.... I'm assuming you are using gridded data here. Use the VGT(V,S) or VGE(V,S) functions to obatain the vectors greater than, or greater or equal to a value. These functions are defined in Section 3 of the GEMPAK manual under the GPARM heading. In a surface or upper air program, you would use SFPARM or SNPARM using the qualifier such as sped>value. Steve Chiswell Unidata User Support On Wed, 2004-02-25 at 09:45, Pete Pokrandt wrote: > All, > > Received a question from one of our visiting scientists, I don't > see an answer in a quick look through the manuals.. Any ideas? > > >do you know a way to tell GEMPAK to plot only vectors above a certain > >magnitude??? > > Thanks, > > Pete > > -- > +>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+ > ^ Pete Pokrandt V 1447 AOSS Bldg 1225 W Dayton St^ > ^ Systems Programmer V Madison, WI 53706 ^ > ^ V address@hidden ^ > ^ Dept of Atmos & Oceanic Sciences V (608) 262-3086 (Phone/voicemail) ^ > ^ University of Wisconsin-Madison V 262-0166 (Fax) ^ > +<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+