Dusty in Khobar and Freezing in Riyadh

A Sand storm came through yesterday and washed the clean off all my plants. After the sand storm the air looks like a dirty fog and when you walk outside you can feel the dust when you breath. The dust gets everywhere, a room with a window left open will have a layer of dust over everything, like a prematurely aged ruin. The temperature dropped today, it's cold (2°C min - 12°C max). It will hit freezing in Riyadh tonight. I have an odd desert experience.