RVRNO
Indicates that the Runway Visual Range (RVR) reporting system is not operating or is not available at this station. RVR provides precise visibility measurements along the runway and is critical for instrument approach operations, especially in low-visibility conditions. When RVR is unavailable, pilots must rely on prevailing visibility.
RMK RVRNO
RMK AO2 RVRNO
RMK RVRNO $
RVRNO stands for "RVR Not Available" in the remarks section of a METAR report. Indicates that the Runway Visual Range (RVR) reporting system is not operating or is not available at this station. RVR provides precise visibility measurements along the runway and is critical for instrument approach operations, especially in low-visibility conditions. When RVR is unavailable, pilots must rely on prevailing visibility.
RVRNO 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 RVRNO". This appears in the remarks section and indicates rvr not available information as part of the weather observation.