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Hi to all,<BR><BR>I have just started using the WRF-ARW (after using WRF-NMM) and it outputs <BR>precip as an accumulated total through the forecast period. <BR> <BR>I need to display in hourly amounts using grads. My display field (called <BR>by a menu button from the main script) outputs 10m wind along with SLP and <BR>precipitation every hour for 48 forecast hours. <BR> <BR>The time is set to _x earlier on in the run script and I wrote the <BR>following:<BR> <BR>####################################################<BR>function rain()<BR># printing out the first hour's precipitation<BR>if _x = 1<BR> 'set gxout contour'<BR> 'set cthick 2'<BR> 'set cmin 0.3'<BR> 'set ccolor rainbow'<BR> 'd APCPsfc'<BR> 'set cthick 3'<BR> 'set ccolor 4'<BR> 'set cmax 0.0001'<BR> 'set cint 0.1'<BR> 'd APCPsfc'<BR># printing out all the following hours precipitation<BR>else<BR> 'define current = APCPsfc'<BR> _x = _x - 1<BR> 'define last = APCPsfc'<BR> _x = _x + 1<BR> 'define hourly = current-last'<BR> 'set gxout contour'<BR> 'set cthick 2'<BR> 'set cmin 0.3'<BR> 'set ccolor rainbow'<BR> 'd hourly'<BR> 'set cthick 3'<BR> 'set ccolor 4'<BR> 'set cmax 0.0001'<BR> 'set cint 0.1'<BR> 'd hourly'<BR> 'undefine last'<BR> 'undefine current'<BR> 'undefine hourly'<BR>endif<BR>return<BR>######################################<BR><BR>I have been struggling with this for a week, and reading through the <BR>script writing section, it appears that one cannot attach new values to <BR>a 'global variable' such as _x. How then else are you able to step back <BR>one hour so that you can retrieve that data to subtract it from the <BR>current hour?<BR> <BR>Thanks for any help,<BR>Theo<BR><BR></body>
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