Which factor allowed frontal forecasting to become highly developed?

The development of frontal forecasting can primarily be attributed to advancements in aviation. During the early to mid-20th century, as aviation technology progressed, the need for accurate weather forecasting became increasingly critical for safe flight operations. The aviation industry required a reliable system to predict weather phenomena, including the sudden shifts associated with frontal systems, such as cold fronts and warm fronts.

The establishment of meteorological practices, tools, and communication systems tailored to the needs of aviation significantly improved the understanding of how fronts interact with the atmosphere. This led to sophisticated forecasting techniques that considered the dynamic nature of air masses and their boundaries, allowing meteorologists to predict weather changes associated with these fronts more accurately.

In contrast, while synoptic meteorology, weather observation, and climatic studies contribute to the overall understanding of weather patterns and systems, they were not as closely tied to the immediate operational needs that drove the advancements in frontal forecasting as aviation was.