In a TAF, what does "VRB" refer to when discussing wind?

In a TAF, "VRB" stands for variable direction when discussing wind. This term indicates that the wind is changing from one direction to another and does not maintain a consistent bearing. It is important for pilots and meteorologists to understand wind variability as it can significantly impact flight performance and navigational decisions. When wind direction is noted as variable, it emphasizes that the wind is not steady and could shift, which can affect takeoff, landing, and in-flight maneuvers.

The other terms do not apply to the context of a TAF. "Very strong winds" could be referenced in a different manner, but is not indicated by "VRB". "Vertical range" pertains to different measurements in meteorology but does not relate to wind direction. "Varying resistance" is not a standard term used in aviation weather reports. Thus, recognizing "VRB" as variable direction helps clarify essential wind characteristics that pilots must be aware of during flight planning and operations.