Huge humidity drop with south east wind 🤨

One of the first times in so many years I see this as radical. In a matter of hours we go from +/- 90% to hardly 28%. Seems this wind comes from the Sahara or other hyper dry region . Did double check with a few other stations around and we all have this. This is unusual where I live, it’s rather humid on average (stats give +/- 80% average for 2021)