What wind is forecast for STL at 9,000 feet?

The correct answer indicates that the forecast wind for STL at 9,000 feet is 230° true at 32 knots. This means that the wind is coming from a direction of 230 degrees on a true north reference, which is essential for pilots to understand the wind direction with respect to the geography of the area. Additionally, the speed of 32 knots provides critical information for flight planning, as wind speed affects aircraft performance, fuel consumption, and flight duration.

When planning a flight, knowing the true heading of the wind allows pilots to adjust their flight path for optimal efficiency and safety. It is also important to use true heading instead of magnetic when discussing wind, as this removes any confusion that might arise from magnetic variation, which can differ based on location.

Understanding the details of the wind forecast is vital for maneuvers such as takeoff, landing, and in-flight navigation, making the forecasting at particular altitudes a key aspect of pre-flight preparation.