What does "PRESRR" indicate in a METAR report?

In a METAR report, "PRESRR" stands for "Pressure Rising Rapidly." This term is significant because it provides essential information about atmospheric conditions that can affect weather patterns and flight operations. When this code appears in a METAR, it indicates that the atmospheric pressure is increasing quickly, which typically suggests improving weather conditions.

The presence of this indicator can be particularly valuable to pilots and meteorologists, as rising pressure often correlates with the movement of high-pressure systems that can bring clearer skies and more stable flying conditions. Understanding these nuances in METAR reports is crucial for effective weather forecasting and aviation safety.