Depicted above is a westward trajectory out of a launch from Fort Sumner in early October. The colors tracing the trajectory course in the image above correspond to balloon altitude. The graph shows the balloon's altitude on an hourly basis from launch to termination.
At "Turn-around," which usually commences in the latter part of September or early October, the stratospheric winds begin to shift, ultimately trending in a west-to-east direction. Flight occurring during the wind shift can experience some unusual trajectories. Observers in Fort Sumner were treated to the rare sight of the balloon at float, which after flying almost to Mexico, reversed course and overflew the launch site some six hours after it was released.
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