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

• A. 230° true at 32 knots
• B. 230° true at 29 knots
• C. 240° true at 32 knots
• D. 210° true at 32 knots

Answer: (A)

Winds aloft are given as the direction from which the wind is blowing and the speed in knots, using true directions. At 9,000 feet for STL, the forecast is a wind from 230 degrees at 32 knots. So the air is moving from the southwest toward the northeast at 32 knots. This is the best answer because it matches the forecasted direction and speed for that altitude. The other options differ in either direction (210 or 240) or speed (29 knots), so they don’t align with the forecast. For flight planning, use the true wind direction and speed, and convert to magnetic only if you need it for navigating with a magnetic reference.