<div dir="ltr">This is not a bug to my knowledge, GFS files have been this way for quite some years. All parameterized fields don't exist in the F000 files, exist with _acc or _avg at F006, and with _acc6h or _avg6h at F012 and beyond. In my decoding, I can see this is readily true with cloud cover variables and outgoing longwave radiation variables in addition to precipitation. It's important to note that precip in grids beyond 6 hours can be accumulation of different kinds - either over the latest 6 hours or over all hours combined over the entirety of the times since the initialization of the model run. It is important to look at the documentation and descriptions - these are all provided nicely within the GRIB2 file attributes as well, if you look without grep commands.<div>
<br></div><div>It is *crucial* to understand your data - if you can't tell the difference between the fields, you need to stop and look more closely. See below, first text is from forecast hour 6 and second from forecast hour 36.</div>
<div><br></div><div>
<p class=""> float APCP_P8_L1_GLL0_acc ( lat_0, lon_0 )</p><p class=""> center :<span class=""> </span>US National Weather Service - NCEP (WMC)</p><p class=""> production_status :<span class=""> </span>Operational products</p>
<p class=""> long_name :<span class=""> </span>Total precipitation</p><p class=""> units :<span class=""> </span>kg m-2</p><p class=""> _FillValue :<span class=""> </span>1e+20</p><p class=""> grid_type :<span class=""> </span>Latitude/longitude</p>
<p class=""> parameter_discipline_and_category :<span class=""> </span>Meteorological products, Moisture</p><p class=""> parameter_template_discipline_category_number :<span class=""> </span>( 8, 0, 1, 8 )</p>
<p class=""> level_type :<span class=""> </span>Ground or water surface</p><p class=""> level :<span class=""> </span> 0</p><p class=""> type_of_statistical_processing :<span class=""> </span>Accumulation</p>
<p class=""> <b> statistical_process_duration :<span class=""> </span>initial time to forecast time</b></p><p class=""> forecast_time :<span class=""> </span>6</p><p class=""> forecast_time_units :<span class=""> </span>hours</p>
<p class="">
</p><p class=""> initial_time :<span class=""> </span>08/29/2014 (00:00)</p><p class=""><br></p><p class=""> float APCP_P8_L1_GLL0_acc6h ( lat_0, lon_0 )</p>
<p class=""> center :<span class=""> </span>US National Weather Service - NCEP (WMC)</p>
<p class=""> production_status :<span class=""> </span>Operational products</p>
<p class=""> long_name :<span class=""> </span>Total precipitation</p>
<p class=""> units :<span class=""> </span>kg m-2</p>
<p class=""> _FillValue :<span class=""> </span>1e+20</p>
<p class=""> grid_type :<span class=""> </span>Latitude/longitude</p>
<p class=""> parameter_discipline_and_category :<span class=""> </span>Meteorological products, Moisture</p>
<p class=""> parameter_template_discipline_category_number :<span class=""> </span>( 8, 0, 1, 8 )</p>
<p class=""> level_type :<span class=""> </span>Ground or water surface</p>
<p class=""> level :<span class=""> </span> 0</p>
<p class=""> type_of_statistical_processing :<span class=""> </span>Accumulation</p>
<p class=""> <b> statistical_process_duration :<span class=""> </span>6 hours (ending at forecast time)</b></p>
<p class=""> forecast_time :<span class=""> </span>36</p>
<p class=""> forecast_time_units :<span class=""> </span>hours</p>
<p class=""> initial_time :<span class=""> </span>08/29/2014 (00:00)</p><p class=""><br></p><p class="">Kyle</p></div></div><div class="gmail_extra"><br clear="all"><div><div dir="ltr">----------------------------------------<div>
Kyle S. Griffin</div><div>Department of Atmospheric and Oceanic Sciences</div><div>University of Wisconsin - Madison</div><div>Room 1421</div><div>1225 W Dayton St, Madison, WI 53706</div><div>Email: <a href="mailto:ksgriffin2@wisc.edu" target="_blank">ksgriffin2@wisc.edu</a></div>
</div></div>
<br><br><div class="gmail_quote">On Thu, Aug 28, 2014 at 10:00 PM, Rabah Hachelaf <span dir="ltr"><<a href="mailto:hachelaf@sca.uqam.ca" target="_blank">hachelaf@sca.uqam.ca</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Files can be downloaded simply by these links : <div><br></div><div><a href="ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2014082800/gfs.t00z.pgrb2f06" target="_blank">ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2014082800/gfs.t00z.pgrb2f06</a><br>
</div><div><a href="ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2014082800/gfs.t00z.pgrb2f12" target="_blank">ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2014082800/gfs.t00z.pgrb2f12</a><br></div>
<div><a href="ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2014082800/gfs.t00z.pgrb2f18" target="_blank">ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2014082800/gfs.t00z.pgrb2f18</a><br>
</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-08-28 22:50 GMT-04:00 Dennis Shea <span dir="ltr"><<a href="mailto:shea@ucar.edu" target="_blank">shea@ucar.edu</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div><div><div><div><div><div><div><div><div><div>This is offline.<br><br></div>Send the files to<br><br></div>ftp <a href="http://ftp.cgd.ucar.edu" target="_blank">ftp.cgd.ucar.edu</a><br></div>anonymous<br>
</div>your_email<br>
</div>cd incoming<br></div>put gfs.t00z.pgrb2f06.grib2<br></div>put gfs.t00z.pgrb2f12.grib2<br></div>quit<br><br></div>Notify me *after* successful transfer of the files.<br><br>===<br></div><div>Also, whenever you suspect a bug, please include the version of NCL you are using.<br>
<br></div><div>%> ncl -V<br><br></div><div><br></div>Regards<br><div><br><br><br><div><div><div><div><br></div></div></div></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote"><div><div class="h5">
<div><div>
On Thu, Aug 28, 2014 at 8:42 PM, Rabah Hachelaf <span dir="ltr"><<a href="mailto:hachelaf@sca.uqam.ca" target="_blank">hachelaf@sca.uqam.ca</a>></span> wrote:<br>
</div></div></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div><div><div dir="ltr">Hi all,<div><br></div><div>When reading precipitation from GFS 0.5 deg data precipiation variables change names between 6h forecast and other hours like this : </div>
<div><br></div><div><div> ncl_filedump gfs_data/gfs.t00z.pgrb2f06.grib2 | grep "AP"</div>
<div> float CAPE_P0_L1_GLL0 ( lat_0, lon_0 )</div><div> float CAPE_P0_2L108_GLL0 ( lv_SPDL11, lat_0, lon_0 )</div><div> float APCP_P8_L1_GLL0_acc ( lat_0, lon_0 )</div></div><div><br></div><div><div>ncl_filedump gfs_data/gfs.t00z.pgrb2f12.grib2 | grep "AP"</div>
<div> float CAPE_P0_L1_GLL0 ( lat_0, lon_0 )</div><div> float CAPE_P0_2L108_GLL0 ( lv_SPDL11, lat_0, lon_0 )</div><div> float APCP_P8_L1_GLL0_acc<b><u>6h</u></b> ( lat_0, lon_0 )</div><div><br></div><div>I am not sure if this is a bug or there is an other way to read all forecast hours with the same variable name. </div>
<span><font color="#888888">
<div><br></div><div>Rabah</div>-- <br><div dir="ltr"><div>------------------------------</div>Cordialement,<br>Best regards,<br>Rabah Hachelaf <br><br></div>
</font></span></div></div>
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</blockquote></div><div class=""><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><div>------------------------------</div>Cordialement,<br>Best regards,<br>Rabah Hachelaf <br></div>
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