METAR weather code reference for CLR (Clear Below 12,000)
Used exclusively by automated stations (ASOS/AWOS) to indicate that no clouds were detected below 12,000 feet AGL. The sensor cannot detect clouds above that altitude, so CLR does not guarantee clear skies above 12,000 feet. Pilots planning flights above 12,000 feet should consult additional weather sources.
Here are common ways CLR appears in real METAR observations:
CLRCLR A2992CLR 10SMThese METAR codes are commonly seen alongside CLR or describe related weather phenomena:
Indicates that the sky is completely clear with no clouds at any altitude. SKC is used when a human observer reports clear skies. This represents 0/8 cloud coverage. A sky clear report means excellent VFR conditions with respect to cloud cover.
Cloud coverage of 1/8 to 2/8 of the sky. Few clouds indicate mostly clear conditions and are not considered a ceiling. Followed by a three-digit height in hundreds of feet AGL (e.g., FEW050 means few clouds at 5,000 feet). FEW conditions are VFR-friendly and pose minimal obstruction.