WRF Preprocessing System Version 3.3.1: Known Problems and Fixes

Report of Seg Fault on Some System using Intel compiler:

Problem: Several users reported a segmentation fault error when running metgrid.exe, with an ifort compiler.

Solution: Try to compile serially instead.

If you are using a global domain, then you will need to download these 2 files. Unpack the tar file and place the 2 files in your WPS/metgrid/src/ directory. You will need to go back to WPS/, issue a 'clean -a', then reconfigure with no optimization (./configure -d). Then recompile.

PROBLEM USING GFS REAL-TIME DATA SINCE MAY 22, 2012:

Problem: NCEP has updated its real-time GFS GRIB2 files, beginning 2012-05-22_12:00:00. This is causing ungrib to extract incorrect data for surface fields. If your domain includes a pole or the Prime Meridian (0° longitude), program real may abort. If your domain lies elsewhere, the real program may not abort, but you will likely get incorrect surface fields.

Solution: you need to go into the /WPS/ungrib/src/rd_grib2.F file and search for these lines:

elseif(gfld%ipdtmpl(10).eq.101) then
! MSL
level=201300.

Below that, you will need to add the following:

elseif(gfld%ipdtmpl(10).eq.103) then
! Height above ground (m)
if ( (gfld%ipdtmpl(12) .eq. 2. ) .or.
& (gfld%ipdtmpl(12) .eq. 10.) ) then
level=200100.
else
cycle MATCH_LOOP
endif

Once you add this, save the file and recompile WPS. There is no need to perform a 'clean -a' or to reconfigure.

Missing Surface RH in Vtable for CFSR data (posted July 30, 2012):

Problem: If one's using Vtable.CFSR_sfc_flxh06 to degrib CFSR data, one would not obtain surface RH field correctly.

Solution: Download this modified Vtable.CFSR_sfc_flxh06.