How is the direction and speed of winds aloft determined?

The direction and speed of winds aloft are primarily determined by factors such as atmospheric pressure gradients, the Coriolis effect, and thermal differences within the atmosphere. Meteorologists analyze weather maps and data from weather balloons, satellites, and aircraft to assess these factors. The pressure gradient force drives winds from high to low pressure, while the Coriolis effect causes winds to curve, influencing their direction at various altitudes. Additionally, jet streams, which are fast-flowing air currents at higher altitudes, significantly impact wind patterns.