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gust, in meteorology, a sudden increase in wind speed above the average wind speed. More specifically, wind speed must temporarily peak above 16 knots (about 30 km per hour) after accelerating by at least 9–10 knots (about 17–19 km per hour) to qualify as a gust.
- The Editors of Encyclopaedia Britannica
May 22, 2017 · 2 Answers. A US definition is: Wind Gust: Is a sudden, brief increase in speed of the wind. According to U.S. weather observing practice, gusts are reported when the peak wind speed reaches at least 16 knots and the variation in wind speed between the peaks and lulls is at least 9 knots.
What causes wind? So wind is caused by differences in atmospheric pressure - but why do we get these differences? It's down to the rising and sinking of air in the atmosphere. Where air is...
- Cup Anemometer
- Sonic Anemometer
- Measuring Gusts and Wind Intensity
Wind speed is normally measured by a cup anemometer consisting of three or four cups, conical or hemispherical in shape, mounted symmetrically about a vertical spindle. The wind blowing into the cups causes the spindle to rotate. In standard instruments the design of the cups is such that the rate of rotation is proportional to the speed of the win...
Where wind measurements are made in extreme weather conditions, such as on the top of mountains, a heated sonic anemometer is used having no moving parts. The instrument measures the speed of acoustic signals transmitted between two transducers located at the end of thin arms. Measurements from two pairs of transducers can be combined to yield an e...
Because wind is an element that varies rapidly over very short periods of time it is sampled at high frequency (every 0.25 sec) to capture the intensity of gusts, or short-lived peaks in speed, which inflict greatest damage in storms. The gust speed and direction are defined by the maximum three second average wind speed occurring in any period. A ...
What is wind? In simple terms, wind is the movement of air. This movement is caused by pressure differences, which in turn were caused by temperature differences. In other words, it all starts with the sun. As the sun warms the earth’s surface, the atmosphere warms too.
Gust A brief sudden increase in wind speed. Generally the duration is less than 20 seconds and the fluctuation greater than 10 miles per hour. In Canada, gust is defined as a sudden, brief increase in wind speed that generally lasts less than 20 seconds.
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5 days ago · The Short Answer: A gust front is a line of dangerously gusty winds created by certain weather conditions. When a downdraft from a raining thunderstorm hits the ground, it spreads out in all directions. This spreading air can move very fast, and as it spreads, it can create a gust front.
