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Stonie, No...not possible. The 3 hourly pressure tendency can be plotted in SFMAP using decoded values of that parameter. Steve Chiswell Unidata User Support >From: "Stonie R. Cooper" <address@hidden> >Organization: Planetary Data, Incorporated >Keywords: 200511012055.jA1KtA7s023242 >Steve - feeling like a moron . . . but I seem to remember in the early '90's >making some scripts for Clint Rowe that plotted pressure tendency via >snmap . . . something like (but this obviously is not it): > >snparm=hght^/1200-hght^/0000 > >Is this simply impossible, or am I losing sanity? >-- >Stonie Cooper, >Planetary Data, Incorporated >(402) 727-6599 > -- NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.