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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I have a question regarding Open GrADS.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m trying to use <i>if statements</i> for scalar model data (eg. GFS and NAM) over a grid and I’m wondering if it’s possible to do this. As an example, I’m using if statements for these parameters: surface based CAPE, LI, and 500 mb relative
humidity to create an index to plot on a map. So far GrADS isn’t showing that this is working, however, I can plot the model data individually so I don’t think it’s a case of missing data.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here’s some of the code for the NAM model. Note that I define the variable NAMHail to equal 0 at the start of the function.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> if (modelNumberNAM>0)<o:p></o:p></p>
<p class="MsoNormal"> set_maps(_map,_hasNegativeNAM)<o:p></o:p></p>
<p class="MsoNormal"> 'set grads off'<o:p></o:p></p>
<p class="MsoNormal"> 'set grid off'<o:p></o:p></p>
<p class="MsoNormal"> 'set gxout contour'<o:p></o:p></p>
<p class="MsoNormal"> 'set ccolor 0'<o:p></o:p></p>
<p class="MsoNormal"> 'set clopts -1 1 0.15'<o:p></o:p></p>
<p class="MsoNormal"> 'set cint 1'<o:p></o:p></p>
<p class="MsoNormal"> 'set cthick 6'<o:p></o:p></p>
<p class="MsoNormal"> 'set clab on'<o:p></o:p></p>
<p class="MsoNormal"> 'set csmooth on'<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> 'NAMcape = CAPEsfc.'modelNumberNAM<o:p></o:p></p>
<p class="MsoNormal"> if (NAMcape > 1500 & NAMcape < 2200)<o:p></o:p></p>
<p class="MsoNormal"> 'NAMHail = NAMHail + 1'<o:p></o:p></p>
<p class="MsoNormal"> endif<o:p></o:p></p>
<p class="MsoNormal"> if (NAMcape > 2199 & NAMcape < 3100)<o:p></o:p></p>
<p class="MsoNormal"> 'NAMHail = NAMHail + 2'<o:p></o:p></p>
<p class="MsoNormal"> endif<o:p></o:p></p>
<p class="MsoNormal"> if (NAMcape > 3099)<o:p></o:p></p>
<p class="MsoNormal"> 'NAMHail = NAMHail + 3'<o:p></o:p></p>
<p class="MsoNormal"> endif<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> 'set lev 500'<o:p></o:p></p>
<p class="MsoNormal"> 'NAMrh500=RHprs.'modelNumberNAM<o:p></o:p></p>
<p class="MsoNormal"> if (NAMrh500 < 35)<o:p></o:p></p>
<p class="MsoNormal"> 'NAMHail = NAMHail + 3'<o:p></o:p></p>
<p class="MsoNormal"> endif<o:p></o:p></p>
<p class="MsoNormal"> if (NAMrh500 > 35 & NAMrh500 < 44)<o:p></o:p></p>
<p class="MsoNormal"> 'NAMHail = NAMHail + 1'<o:p></o:p></p>
<p class="MsoNormal"> endif<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> endif<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> 'set gxout contour'<o:p></o:p></p>
<p class="MsoNormal"> 'set ccolor 0'<o:p></o:p></p>
<p class="MsoNormal"> 'set clopts -1 1 0.15'<o:p></o:p></p>
<p class="MsoNormal"> 'set cint 200'<o:p></o:p></p>
<p class="MsoNormal"> 'set cthick 6'<o:p></o:p></p>
<p class="MsoNormal"> 'set clab on'<o:p></o:p></p>
<p class="MsoNormal"> 'set csmooth on'<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> 'd NAMcape'<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks!<o:p></o:p></p>
<p class="MsoNormal" style="text-autospace:none"><o:p> </o:p></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#5F2167;mso-fareast-language:EN-CA">Matt Baker</span></b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#5F2167;mso-fareast-language:EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#5F2167;mso-fareast-language:EN-CA">Meteorologist, Met-Ocean Services, Amec Foster Wheeler Environment & Infrastructure
</span><b><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#5F2167;mso-fareast-language:EN-CA"><o:p></o:p></span></b></p>
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