What does the acronym SA indicate in weather reporting?

The acronym SA in weather reporting refers to "Sand." It is used in conjunction with other information to indicate the presence of sand in the air, particularly in areas prone to desert-like conditions or during specific weather events that stir up fine particulate matter. This can affect visibility and has implications for both aviation and ground operations. Notably, the other options focus on specific scenarios related to sand but do not represent the general term used in meteorological contexts, which is simply "Sand." Understanding this terminology is essential for interpreting weather conditions accurately, especially for pilots and drone operators who need to be aware of how sand can affect flight safety and performance.