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The evolutionary characteristics of the meteorological elements and horizontal wind shear under southeast strong wind around the runway are analyzed on the basis of the conventional meteorological data and the realtime AWOS data from airport runways during typical southeast strong wind processes at the Urumqi international airport from 2002 to 2005. The results show: (1) the meteorologi cal elements under southeast strong wind changed significantly. The temperature rose, and the pressure and the humidity descended at the beginning and during the maintain stage, while the temperature decreased, and the pressure and humidity increased in the end. The temperature, pressure, and humidity changed abruptly at the same time when the wind weakened. (2) The strong horizontal wind shear ab ove the runway appeared because of the discontinuousness in wind direction and velocity in different places along the runway at the same time, especially at the beginning and in the end. The difference in wind velocity between two ends of the runway and its variation are dominant factors affecting the strength and variation of the wind shear.