I diverted to Wadi Halfa on May 16 1964 en route to Khartoum which had become significantly below limits due to a sand storm.
Wadi was also affected and we only just squeaked in after receiving some less than sanguine met reports. With commendable efficiency from local staff we refuelled under difficult circumstances and continued our journey to Khormaksar. There was a paved surface albeit very sandy!
If memory serves the airfield was flooded the following week and our fate would have been less than predictable had the flight been later. Weather and traffic information were always clearly compromised with rising sand!