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<p>Hi Bill, </p>

<p>Yes i've scrolled through the page and that's where I found out you can call for single parameters but through the bytes in the idx file, which is useless unless you use python i suspect. </p>

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<p>Thanks all the same,</p>

<p><br /></p>

<p>Stu</p>

<p><br /></p>

<p><br /></p>

<p><br /></p>

<p id="reply-intro">On 02-02-2022 15:19, Bill Reilly wrote:</p>

<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; margin: 0">

<div class="pre" style="margin: 0; padding: 0; font-family: monospace"><span style="white-space: nowrap;">Hello:</span><br /><br />I had a look and tried using the data as well but had problems, so I checked out the User Documentation page for this data:<br /><br /><span style="white-space: nowrap;"><a href="https://confluence.ecmwf.int/display/UDOC/ECMWF+Open+Data+-+Real+Time" target="_blank" rel="noopener noreferrer">https://confluence.ecmwf.int/display/UDOC/ECMWF+Open+Data+-+Real+Time</a></span><br /><br /><span style="white-space: nowrap;">Maybe something on that page is useful to you.</span><br /><br />Bill<br /><br /><span style="white-space: nowrap;">--</span><br /><br /><span style="white-space: nowrap;">Bill Reilly</span><br /><br /><span style="white-space: nowrap;">(+34) 686-110-748</span><br /><br /><span style="white-space: nowrap;"><a href="mailto:bill@passageweather.com">bill@passageweather.com</a></span><br /><span style="white-space: nowrap;"><a href="http://www.passageweather.com" target="_blank" rel="noopener noreferrer">www.passageweather.com</a></span><br /><br /><span style="white-space: nowrap;">On 02/02/2022 11:49, CW Weather wrote:</span>

<blockquote type="cite" style="padding: 0 0.4em; border-left: #1010ff 2px solid; margin: 0"><br /><span style="white-space: nowrap;">Hello all,</span><br /><br /><br />ECMWF have made some data freely available on top of the WMO data sets. The link is here <a href="https://data.ecmwf.int/forecasts/" target="_blank" rel="noopener noreferrer">https://data.ecmwf.int/forecasts/</a>. I have downloaded via wget for exmaple - <a href="https://data.ecmwf.int/forecasts/20220202/00z/0p4-beta/oper/20220202000000-6h-oper-fc.grib2" target="_blank" rel="noopener noreferrer">https://data.ecmwf.int/forecasts/20220202/00z/0p4-beta/oper/20220202000000-6h-oper-fc.grib2</a> and then run a simple perl command as follows;<br /><br /><span style="white-space: nowrap;">@ECHO Please wait, concetenating grb files...</span><br /><span style="white-space: nowrap;">cat *.grb > ecmwf_grib.grib2</span><br /><span style="white-space: nowrap;">@ECHO Please wait, creating ctl file...</span><br /><span style="white-space: nowrap;">perl g2ctl.pl -verf ecmwf_grib.grib2 > ecmwf_grib.ctl</span><br /><span style="white-space: nowrap;">@ECHO Please wait, creating idx file...</span><br /><span style="white-space: nowrap;">gribmap -i ecmwf_grib.ctl -e</span><br /><br /><br />but as you can see on the attached image the control file hasn't got the variable names or values correct and TP (total precip) isn't possible to fathom on the file. Ive managed to guess most variable like pressure, t2m wind ect.<br /><br /><br />There is a way to download single variable per time step but you would have to input the length and/or bytes from the idx file for example - |wget <a href="https://data.ecmwf.int/forecasts" target="_blank" rel="noopener noreferrer">https://data.ecmwf.int/forecasts</a> <<a href="https://data.ecmwf.int/forecasts/20220202/00z/0p4-beta/oper/20220202000000-6h-oper-fc.grib2" target="_blank" rel="noopener noreferrer">https://data.ecmwf.int/forecasts/20220202/00z/0p4-beta/oper/20220202000000-6h-oper-fc.grib2</a>>/||20220125||/00z/0p4-beta/oper/||20220125000000||-24h-oper-fc.grib2 --header=||"Range: bytes=17459800-18068845"|<br /><br />However the range values will change on every time step and every forecast and as such wont be viable to run automatically. I know its possible in python but like others I dont use python so my question is, is there a way to use wgrib or maybe .inv to breakdown the gribs into readable format using a perl code?<br /><br /><br />-- Kind regards,<br /><br /><span style="white-space: nowrap;">*Stuart Markham*</span><br /><br /><span style="white-space: nowrap;">//</span><br /><br /><span style="white-space: nowrap;">/Founder of CW Weather/</span><br /><br /><span style="white-space: nowrap;">/Website: chorleyweather.com <<a href="https://www.chorleyweather.com/" target="_blank" rel="noopener noreferrer">https://www.chorleyweather.com/</a>>/</span><br /><br /><br />_______________________________________________<br /><span style="white-space: nowrap;">gradsusr mailing list</span><br /><span style="white-space: nowrap;"><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a></span><br /><span style="white-space: nowrap;"><a href="http://gradsusr.org/mailman/listinfo/gradsusr" target="_blank" rel="noopener noreferrer">http://gradsusr.org/mailman/listinfo/gradsusr</a></span></blockquote>

<br />_______________________________________________<br /><span style="white-space: nowrap;">gradsusr mailing list</span><br /><span style="white-space: nowrap;"><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a></span><br /><span style="white-space: nowrap;"><a href="http://gradsusr.org/mailman/listinfo/gradsusr" target="_blank" rel="noopener noreferrer">http://gradsusr.org/mailman/listinfo/gradsusr</a></span></div>

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<div id="signature">-- <br />

<p>Kind regards,</p>

<p><strong>Stuart Markham</strong></p>

<p><em><img src="cid:6b66f0ed98388166210072475f549d2c@chorleyweather.com" width="78" height="51" /></em></p>

<p><em>Founder of CW Weather</em></p>

<p><em>Website: <a href="https://www.chorleyweather.com/">chorleyweather.com</a></em></p>

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