Micro Bursts and Wind Shear
The wind has a great impact on aircraft performance. A headwind increases lift and drag and a tailwind does the opposite. A microburst occurs from convective precipitation falling into dry air causing a starburst shape of wind directions centered around a downdraft point illustrated in the picture above. This drastic change in wind velocity and direction is referred to as wind shear (FAA, n.d.). Wind shear can occur at any altitude but wind shear at low altitude is especially hazardous due to the proximity of the aircraft to the ground. When an aircraft flies through a microburst after departure, the aircraft will experience increased lift from the headwind causing the pilot to nose down or decrease throttle to maintain their departure path. In the center of the microburst, the downdraft changes the wind direction from a headwind to a vertical downwind. This decreases the lift generated by the wings and increases the "weight". The aircraft will lose altit...