What is a typical limit beyond which corrected reports are not sent?

The practice of issuing corrected reports, typically referred to as amended METARs, follows a standard timeline to ensure that the information remains relevant and beneficial for operational purposes. When there is a significant discrepancy in the weather observation that needs correction, it is crucial that the updated information is disseminated promptly to maintain accuracy.

The limit for issuing corrections is generally set at 15 minutes. Reports that exceed this time frame can lead to outdated information that could compromise safety and decision-making for flight operations. Therefore, a 15-minute window ensures that any errors identified in the original report are addressed swiftly, allowing for better situational awareness for pilots and air traffic controllers.

Both shorter and longer limits have unique contexts, but the 15-minute threshold is a standard practice recognized in meteorological reporting, balancing the need for thoroughness with the necessity of prompt communication in aviation environments.