diff --git a/EESSI-pilot-install-software.sh b/EESSI-pilot-install-software.sh
index 10c57c6d13..a25c3f1d9e 100755
--- a/EESSI-pilot-install-software.sh
+++ b/EESSI-pilot-install-software.sh
@@ -326,6 +326,12 @@ fail_msg="Installation of IPython failed, that's unexpected..."
 $EB IPython-7.15.0-foss-2020a-Python-3.8.2.eb -r
 check_exit_code $? "${ok_msg}" "${fail_msg}"
 
+echo ">> Installing WRF 3.9.1.1..."
+ok_msg="WRF installed, it's getting hot in here!"
+fail_msg="Installation of WRF failed, that's unexpected..."
+OMPI_MCA_pml=ucx UCX_TLS=tcp $EB WRF-3.9.1.1-foss-2020a-dmpar.eb -r --include-easyblocks-from-pr 2648
+check_exit_code $? "${ok_msg}" "${fail_msg}"
+
 echo ">> Creating/updating Lmod cache..."
 export LMOD_RC="${EASYBUILD_INSTALLPATH}/.lmod/lmodrc.lua"
 if [ ! -f $LMOD_RC ]; then
diff --git a/eb_hooks.py b/eb_hooks.py
index 126d89ca46..653094266d 100644
--- a/eb_hooks.py
+++ b/eb_hooks.py
@@ -4,7 +4,7 @@
 
 from easybuild.tools.build_log import EasyBuildError, print_msg
 from easybuild.tools.config import build_option, update_build_option
-from easybuild.tools.systemtools import POWER, get_cpu_architecture
+from easybuild.tools.systemtools import AARCH64, POWER, get_cpu_architecture
 
 EESSI_RPATH_OVERRIDE_ATTR = 'orig_rpath_override_dirs'
 
@@ -124,8 +124,32 @@ def ucx_eprefix(ec, eprefix):
         raise EasyBuildError("UCX-specific hook triggered for non-UCX easyconfig?!")
 
 
+def pre_configure_hook(self, *args, **kwargs):
+    """Main pre-configure hook: trigger custom functions based on software name."""
+    if self.name in PRE_CONFIGURE_HOOKS:
+        PRE_CONFIGURE_HOOKS[self.name](self, *args, **kwargs)
+
+
+def wrf_preconfigure(self, *args, **kwargs):
+    """
+    Pre-configure hook for WRF:
+    - patch arch/configure_new.defaults so building WRF with foss toolchain works on aarch64
+    """
+    if self.name == 'WRF':
+        if get_cpu_architecture() == AARCH64:
+            pattern = "Linux x86_64 ppc64le, gfortran"
+            repl = "Linux x86_64 aarch64 ppc64le, gfortran"
+            self.cfg.update('preconfigopts', "sed -i 's/%s/%s/g' arch/configure_new.defaults && " % (pattern, repl))
+            print_msg("Using custom preconfigopts for %s: %s", self.name, self.cfg['preconfigopts'])
+    else:
+        raise EasyBuildError("WRF-specific hook triggered for non-WRF easyconfig?!")
+
 PARSE_HOOKS = {
     'CGAL': cgal_toolchainopts_precise,
     'fontconfig': fontconfig_add_fonts,
     'UCX': ucx_eprefix,
 }
+
+PRE_CONFIGURE_HOOKS = {
+    'WRF': wrf_preconfigure,
+}
diff --git a/eessi-2021.12.yml b/eessi-2021.12.yml
index 0d060f55ac..f3ed9dd9c4 100644
--- a/eessi-2021.12.yml
+++ b/eessi-2021.12.yml
@@ -47,3 +47,9 @@ software:
     toolchains:
       SYSTEM:
         versions: '3.7.3'
+  WRF:
+     toolchains:
+       foss-2020a:
+         versions: 
+           '3.9.1.1': 
+             versionsuffix: -dmpar