I ran into some of that en route from San Sebastian to Lleida once east of Pamplona, so a bit north of where you are. Was rattling my fillings out not helped by the fact I was in a bit of a hurry and doing 160kts most of the way....was glad to be flying something with a +/- 12g ultimate load!
Spain + Aviation = no sense of humour... good luck explaining your precautionary landing ….. I was glad to get back over the hills into France where things are far more friendly.....
Have a safe trip back.......
