What is wind gust?
It’s a short acceleration of wind speed – 20-30 seconds.
Why do wind gusts occur?
A wind gust can occur when there’s a barrier on the wind’s way, such as a building. The wind “surrounds” the object, the traction increases, and wind speed decreases. After moving past the object it increases sharply.
Moving past mountain passes or tunnels the same amount of air “squeezes” through the barrier increasing wind speed after that.
Wind gusts are stronger in the city than in an open area given the wind speed is the same.
Wind gusts (20-30 seconds) make it harder to estimate wind speed during storms and hurricanes, particularly during tropical cyclones. To estimate it in general, wind speed is measured during a certain period of time (5 minutes) and an average and maximum gust speed is fixed.
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