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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Dear WRF User’s,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I found a strange issue when processing GRIB files via WRF POST v2.2.1
when the “j” dimension of my grid was larger than 136 and I asked
for MSLP in my wrf_cntl.parm file. Apparently, when I asked for this
parameter along with other 2-D parameters I would not get any surface variables
written to my GRIB files. After some debugging I discovered a couple of lines
in the code that could cause a problem. It appears that the problem occurs on
line 92 of the <i><span style='font-style:italic'>SLP_new.f</span></i> routine
in <i><span style='font-style:italic'>/sorc/wrfpost</span></i>/ as
“jj” is hardwired to 136. You will also notice that the
“ii” is also hardwired (albeit much larger). These values
look like they are only used for debugging/printing purposes later in this
routine. However, if my grid dimensions are larger than these values then
WRF POST quits without writing SLP or any other subsequent surface variables.
Apparently, WRFPOST computes SLP before any of the other surface
variables, therefore if your grid was bigger than these hardwired values (and
if you asked for SLP) the code would quit before writing out any of the others
(i.e. lat, lon etc ...)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>For now, I have set these two values big enough that it will not cause
any issues. With the bigger values I now have lots of surface variables
coming out in the GRIB files, even with a large “j”dimension.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Has anyone noticed this problem?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Joe<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Joseph G. Dreher, Meteorologist<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>ENSCO Inc<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:Street w:st="on"><st1:address w:st="on"><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>4849 North Wickham Road</span></font></st1:address></st1:Street><o:p></o:p></p>
<p class=MsoNormal><st1:place w:st="on"><st1:City w:st="on"><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Melbourne</span></font></st1:City>,
<st1:State w:st="on">FL</st1:State> <st1:PostalCode w:st="on">32940</st1:PostalCode></st1:place><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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