Which aircraft designation refers to vehicles modified for weather missions?

The designation that refers specifically to aircraft modified for weather missions is indeed linked to the term "Weather." This designation is used to indicate that an aircraft has been adapted or equipped with specialized instruments and equipment to gather meteorological data. These modifications can include additional sensors, data collection systems, and sometimes even unique design features that enhance the aircraft's capacity to collect information about atmospheric conditions, such as temperature, humidity, wind speed, and precipitation.

Such aircraft play a critical role in weather forecasting and atmospheric research by providing real-time data that can influence weather predictions and climate studies. This makes the focus on the term "Weather" particularly appropriate as it directly identifies the purpose of these modifications and their contribution to meteorological science.

While the other terms like "Research/experimental," "Reconnaissance," and "Prototype" describe different types of missions or aircraft configurations, they do not specifically highlight the purpose of gathering weather-related data, which is the primary focus of the designation referring to weather missions.