In my experience these have been completely wrong recently for my neck of the woods (PDX) even at 6-12 hours. Cliff explains in one of his posts that this is be

In my experience these have been completely wrong recently for my neck of the woods (PDX) even at 6-12 hours. Cliff explains in one of his posts that this is because of not modeling the inversion. I’m having better luck with the Copernicus CAMS forecast in Windy