"Another source of fatigue-inducing loads is wind. Wind produces low-frequency drift motions, which can produce low-frequency fatigue effects in mooring lines and risers. These fatigue-inducing effects of wind can be included in the fatigue assessment as described in 4/5.5. Also wind gusts, vortex shedding and other dynamic wind effects can create significant fatigue damage, especially to superstructure components. However, these wind gust and dynamic effects on fatigue are not typically considered in classification. "
This page at Nasa.gov has more information, as well as a nice picture of where they usually are.
Weather forecasts can help you keep out the way, as long as you move at reasonable speed.
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