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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black">Dear GrADS Users,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black">I&#8217;m downloading GFS MOS data in grib2 format (<a href="ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndgd/GT.mosgfs/AR.conus">ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/DF.gr2/DC.ndgd/GT.mosgfs/AR.conus</a>)
 and while I am able to plot the data fine, I can&#8217;t seem to extract data for particular locations.&nbsp; The data seems to be on a Lambert Conformal grid.&nbsp; When trying to extract data, I get an &#8220;Interpolation Operand&#8221; error message.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black">We are using GrADS version 2.0.a8 on a Linux server.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black">Thanks in advance for any help.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black"><o:p>&nbsp;</o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;
color:black">Brian<o:p></o:p></span></p>
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