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Wind gust

Brief increase in wind speed

Brief increase in wind speed

Sound of wind blowing in a pine forest at around 25 m/sec, with gust alterations

A wind gust or simply gust is a brief, sudden increase in the wind speed. It usually lasts for less than 20seconds, briefer than a squall, which lasts minutes. A gust is followed by a lull (or slackening) in the wind speed. Generally, winds are least gusty over large water surfaces and most gusty over rough land and near high buildings.

Definition

The wind is measured using an anemometer or estimated with a windsock. The average value of wind speed is generally measured over a period of 2minutes before the meteorological observation according to the World Meteorological Organization. Any significant variation at this mean wind during the ten minutes preceding the observation are noted as gusts in messages such as METAR.

It is generally reported in METAR when the peak wind speed reaches at least 16 knots (16 kn) and the variation in wind speed between the peaks and average wind is at least 9 to 10 knots (9 to).

References

References

  1. "Gust". [[American Meteorological Society]].
  2. "What causes wind gusts?".
  3. [[World Meteorological Organization]]. "Gust amplitude". Eumetcal.
  4. "Rafale". [[Météo-France]].
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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