As it turns out, ungrib was setting the "wind_grid" flag in the
treecd1ec5bc8944c747d70c64d798f2deff176a2b1f
-rw-r--r-- 5074 README
drwxr-xr-x - arch
-rwxr-xr-x 1672 clean
-rwxr-xr-x 3349 compile
-rwxr-xr-x 4257 configure
drwxr-xr-x - geogrid
-rwxr-xr-x 1138 link_grib.csh
drwxr-xr-x - metgrid
-rw-r--r-- 1638 namelist.wps
drwxr-xr-x - test_suite
drwxr-xr-x - ungrib
drwxr-xr-x - util