diff --git a/var/spack/repos/builtin/packages/scotch/package.py b/var/spack/repos/builtin/packages/scotch/package.py
index 6f4c576be5aedb..a83d0919f258ab 100644
--- a/var/spack/repos/builtin/packages/scotch/package.py
+++ b/var/spack/repos/builtin/packages/scotch/package.py
@@ -20,6 +20,7 @@ class Scotch(CMakePackage, MakefilePackage):
 
     maintainers("pghysels")
 
+    version("7.0.3", sha256="5b5351f0ffd6fcae9ae7eafeccaa5a25602845b9ffd1afb104db932dd4d4f3c5")
     version("7.0.1", sha256="0618e9bc33c02172ea7351600fce4fccd32fe00b3359c4aabb5e415f17c06fed")
     version("6.1.3", sha256="4e54f056199e6c23d46581d448fcfe2285987e5554a0aa527f7931684ef2809e")
     version("6.1.2", sha256="9c2c75c75f716914a2bd1c15dffac0e29a2f8069b2df1ad2b6207c984b699450")
@@ -36,6 +37,8 @@ class Scotch(CMakePackage, MakefilePackage):
     version("5.1.10b", sha256="54c9e7fafefd49d8b2017d179d4f11a655abe10365961583baaddc4eeb6a9add")
 
     build_system(conditional("cmake", when="@7:"), "makefile", default="cmake")
+    variant("threads", default=True, description="use POSIX Pthreads within Scotch and PT-Scotch")
+    variant("mpi_thread", default=True, description="use multi-threaded algorithms in conjunction with MPI")
     variant("mpi", default=True, description="Compile parallel libraries")
     variant("compression", default=True, description="May use compressed files")
     variant("esmumps", default=False, description="Compile esmumps (needed by mumps)")
@@ -53,7 +56,7 @@ class Scotch(CMakePackage, MakefilePackage):
 
     # Does not build with flex 2.6.[23]
     depends_on("flex@:2.6.1,2.6.4:", type="build")
-    depends_on("bison", type="build")
+    depends_on("bison@3.4:", type="build")
     depends_on("mpi", when="+mpi")
     depends_on("zlib", when="+compression")
 
@@ -114,6 +117,8 @@ def cmake_args(self):
             self.define_from_variant("BUILD_LIBESMUMPS", "esmumps"),
             self.define_from_variant("BUILD_SHARED_LIBS", "shared"),
             self.define_from_variant("BUILD_PTSCOTCH", "mpi"),
+            self.define_from_variant("THREADS", "threads"),
+            self.define_from_variant("MPI_THREAD_MULTIPLE", "mpi_thread")
         ]
 
         # TODO should we enable/disable THREADS?
diff --git a/var/spack/repos/jcsda-emc-bundles/packages/ufs-weather-model-env/package.py b/var/spack/repos/jcsda-emc-bundles/packages/ufs-weather-model-env/package.py
index f959f6734a954a..89e3a43e475a00 100644
--- a/var/spack/repos/jcsda-emc-bundles/packages/ufs-weather-model-env/package.py
+++ b/var/spack/repos/jcsda-emc-bundles/packages/ufs-weather-model-env/package.py
@@ -34,6 +34,7 @@ class UfsWeatherModelEnv(BundlePackage):
     depends_on("ip", type="run")
     depends_on("sp", type="run")
     depends_on("w3emc", type="run")
+    depends_on("scotch", type="run")
 
     depends_on("esmf~debug", type="run", when="~debug")
     depends_on("esmf+debug", type="run", when="+debug")