Without looking at any surface observations for the eastern Pyrenees region, winds obviously were northeasterly at and near the surface, except where locally diverted by mountains. How could I tell? The highest topography in this area—the ridge zigzagging from foreground to background—is the border between France and Spain. Cold, moist, post-frontal air off the North Sea heads upslope across western France and forms stratus that banks up against the high Pyrenees, either evaporating very near the tallest ridge or a short distance downslope to the southwest. Between the fascinating physical processes and the striking beauty of the scene, I almost did not remember to shoot!
over France/Spain border (25 Nov 13) Looking SE