Which abbreviation corresponds to a severe weather event involving blowing sand?

The correct abbreviation for a severe weather event involving blowing sand is "SS," which stands for "Sandstorm." This abbreviation is used in meteorological reports to indicate conditions where sand is lifted from the ground and blown about by strong winds, significantly reducing visibility and potentially causing hazardous conditions for navigation and outdoor activities.

Understanding the context for other options can help clarify why they do not represent blowing sand. "SQ" refers to a squall, which is a sudden, strong wind that may occur with a rainstorm but does not specifically denote blowing sand. "SN" stands for snow, making it irrelevant to the discussion of sand. Lastly, "SP" stands for a special weather phenomenon or statement and does not specifically denote sand-related conditions.

Thus, "SS" is the appropriate choice for indicating a severe weather event characterized by blowing sand.