PWINO
Indicates that the automated station's present weather identifier sensor is not functioning. This sensor is responsible for detecting and categorizing current weather phenomena such as rain, snow, fog, and haze. Without it, the present weather field in the METAR may be incomplete or missing.
RMK PWINO
RMK AO2 PWINO
RMK PWINO $
PWINO stands for "Present Weather Sensor Not Available" in the remarks section of a METAR report. Indicates that the automated station's present weather identifier sensor is not functioning. This sensor is responsible for detecting and categorizing current weather phenomena such as rain, snow, fog, and haze. Without it, the present weather field in the METAR may be incomplete or missing.
PWINO appears in the remarks (RMK) section at the end of a METAR observation. The remarks section follows the main body of the METAR and provides additional details about the observation that don't fit into the standard coded format.
Here is an example: "RMK PWINO". This appears in the remarks section and indicates present weather sensor not available information as part of the weather observation.