Which TAF weather phenomena symbol indicates light snow?

The symbol that indicates light snow in TAF reports is indeed "SN." This abbreviation is used consistently in aviation meteorology to specify snowfall conditions where the intensity is light. Such standardization in symbols allows pilots and air traffic controllers to quickly and accurately interpret weather conditions at the terminal aerodrome.

The other symbols provided do not denote light snow. For instance, "SL" usually refers to sleet, which is a different type of precipitation. "LS" could imply a generic term for light snow, but it is not a standard acronym used in meteorological reports. "SW" indicates snow showers, which is a more intense and varied precipitation condition and differs from the consistent light snowfall denoted by "SN." Understanding these symbols is crucial for interpreting weather forecasts and ensuring safe aviation operations.