If a new cloud layer is observed below 1,000 ft AGL, what should be reported?

When a new cloud layer is observed below 1,000 feet AGL, it should be reported as meeting SPECI criteria. SPECI reports are a type of aviation weather observation that indicate significant changes in weather conditions that might affect flight safety or operation. The observation of a new cloud layer at such a low altitude is significant because low clouds can greatly impact visibility, aircraft operations, and overall flight safety.

SPECI reports are specifically designed to capture these types of significant changes in the weather from the standard hourly METAR reports, which provide routine observations. Therefore, when new weather phenomena occur, like a cloud layer forming below 1,000 feet, it triggers the need for a SPECI report, ensuring that pilots and aviation personnel are informed of potentially hazardous conditions in real-time. This is crucial in maintaining safety and situational awareness in aviation operations.