During the mid 80,s I saw a 737 - 200 which diverted into Riyadh of all places after sustaining hail damage.The leading edges of all aerofoils were literally beaten flat, the engine intakes and bullet fairings looked as though someone had worked them over with a ball peen hammer. Judging by the radius of the indentations the hailstones were possibly about golf ball size. The black coating was stripped from the radome and paint removed on the forward fuselage curved section. The surprising thing was that the first stage compressor blades were all intact with no visible distortion. It would seem that hail is not unknown in Saudi as I saw a news report showing hailstones about golf ball size being bulldozed off a mountain road. I was in Riyadh for seven years and never saw hail,I did see the most torrential rain that I ever encountered in Riyadh - I have been in typhoons and tropical monsoons but never saw anything that remotely approached the few hours of rain I saw on that occasion.