What does "DRSN" indicate on a METAR report?

The term "DRSN" on a METAR report stands for "Drifting Snow." This indicates that the snow on the ground is being blown by the wind, creating reduced visibility and potentially impacting weather conditions. The "less than 6' ft" qualifier is not a standard phrase associated with this abbreviation, but drifting snow does imply that the snow is light and moving, which is a critical part of understanding how it affects flight operations and weather assessments.

The METAR format is designed to provide essential weather information to pilots and dispatchers, including phenomena that can impact safety and flight operations. Understanding the specific abbreviations helps in interpreting the conditions quickly, which is crucial for decision-making in dispatch and flight operations. In contrast, other weather phenomena such as dense rain, dust storms, or heavy snow have their own distinct codes and implications that do not align with the "DRSN" designation.