From 0a288a2c908beb3e3f87cd0f7c5e89712b08a991 Mon Sep 17 00:00:00 2001
From: veenstrajelmer <60435591+veenstrajelmer@users.noreply.github.com>
Date: Thu, 23 Feb 2023 15:27:56 +0100
Subject: [PATCH] Update utils.py

Proposing update to fix https://github.com/pydata/xarray/issues/7014
---
 xarray/plot/utils.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/xarray/plot/utils.py b/xarray/plot/utils.py
index b5d5a122c7a..158e74014f8 100644
--- a/xarray/plot/utils.py
+++ b/xarray/plot/utils.py
@@ -304,9 +304,11 @@ def _determine_cmap_params(
     if extend is None:
         extend = _determine_extend(calc_data, vmin, vmax)
 
-    if levels is not None or isinstance(norm, mpl.colors.BoundaryNorm):
+    if levels is not None:
         cmap, newnorm = _build_discrete_cmap(cmap, levels, extend, filled)
         norm = newnorm if norm is None else norm
+    if isinstance(norm, mpl.colors.BoundaryNorm):
+        cmap, norm = _build_discrete_cmap(cmap, levels, extend, filled)
 
     # vmin & vmax needs to be None if norm is passed
     # TODO: always return a norm with vmin and vmax