Emphasize directory naming.

content/applications/app_specific/building_wrf.md

@@ -50,9 +50,9 @@ not set these variables themselves, nor modify their `~/.profile` files.
 {{% /notice %}}
 
 The following sections assume you have downloaded one of the WRF/WPS [releases](https://www2.mmm.ucar.edu/wrf/users/download/get_source.html)
-and unpacked it somewhere with sufficient space to work. For simplicity, the extraced WRF and WPS
+and unpacked it somewhere with sufficient space to work. **The extraced WRF and WPS
 directories should be placed side-by-side in a new empty folder and renamed to `WPS` and 
-either `WRFV3` for WRF versions 3.x, or `WRF` for WRF versions 4.x.
+either `WRFV3` for WRF versions 3.x, or `WRF` for WRF versions 4.x.**
 All commands in each section are run starting relative to the top-level directory, denoted here as `<WRF root`>
 or `<WPS root>`.