In a METAR report, what does the term "SQ" refer to?

In a METAR report, the term "SQ" stands for squalls. This terminology is used to indicate brief but intense bursts of wind, often associated with thunderstorms or significant weather changes. Squalls can affect aircraft operations, safety, and navigation, as they bring sudden and strong wind changes within a short duration, typically lasting only a few minutes. This information is crucial for pilots and air traffic controllers, allowing them to assess potential hazards during takeoff, landing, or while in flight. The other terms mentioned do not pertain to meteorological phenomena commonly reported in METARs, making "squalls" the only appropriate choice in this context.