diff --git a/modules/util/lon_lat_grid.py b/modules/util/lon_lat_grid.py
index 1f47e5ef858968fe4dea1dbf474c3091bb659c47..8973cc5a23d741fd44aaec3cf320e418000195ba 100644
--- a/modules/util/lon_lat_grid.py
+++ b/modules/util/lon_lat_grid.py
@@ -81,6 +81,8 @@ class LonLatGrid:
         if len(lons) == 0 or len(lats) == 0:
             return None, None
 
+        lons = np.where(lons < 0, lons + 360, lons)
+
         lons = lons.flatten()
         lats = lats.flatten()