What types of weather phenomena are critical for VFR flight?

In VFR (Visual Flight Rules) flight, the primary concern is maintaining visual reference with the ground and other aircraft, which makes certain weather phenomena particularly critical. Clouds, visibility, and wind conditions are essential factors that pilots need to monitor closely.

Clouds affect visibility; low or overcast clouds can obstruct a pilot’s view of the terrain and navigation references, which can lead to unsafe conditions. Visibility is directly tied to the ability to see and avoid obstacles, other aircraft, and the terrain, making it a fundamental requirement for safe VFR operations. Wind conditions also play a significant role; strong or turbulent winds can make flying challenging and can affect the aircraft's performance, especially during takeoff and landing.

Other options may contain relevant weather information but do not directly address the specific needs for VFR operations. For example, temperature and humidity levels can impact aircraft performance but are less critical for immediate VFR decision-making compared to clouds and visibility. Precipitation and storm systems, while they certainly pose risks, are more related to adverse conditions rather than the foundational elements necessary for maintaining VFR. Lastly, while barometric pressure impacts altitude readings and weather prediction, it does not primarily concern VFR flight operations in the same way as the visibility and cloud cover