Leaves and small twigs in constant motion; light flags extended. Large wavelets on sea. Moderate Breeze. Raises dust and loose paper; small branches moved. Small waves, fairly frequent white horses. Fresh Breeze. Small trees in leaf begin to sway; crested wavelets form on inland waters. Moderate waves, many white horses. Strong Breeze. Large branches in motion; whistling heard in telegraph wires; umbrellas used with difficulty. Large waves, extensive foam crests.
Near Gale. Whole trees in motion; inconvenience felt when walking against the wind. Foam blown in streaks across the sea. Twigs break off trees; generally impedes progress. Wave crests begin to break into spindrift. Strong Gale. Slight structural damage chimney pots and slates removed. Wave crests topple over, spray affects visibility.
Seldom experienced inland; trees uprooted; considerable structural damage. Sea surface largely white. Violent Storm. Very rarely experienced; accompanied by widespread damage. Medium-sized ships lost to view behind waves. Sea covered in white foam, visibility seriously affected. The scale was named after Sir Francis Beaufort - However, the man did not contribute much to the development of the scale. If a wind force is mentioned without the addition of a special scale, it is usually related to the Beaufort scale.
Thus, information on wind speeds in weather forecasts or in logbooks usually refers to the Beaufort Scale as well. The current version of the scale was defined in with 13 wind speeds. There are 13 classifications in total, ranging from wind force 0 to Based on the wind speed the wind force can be classified in the Beaufort Scale. Thereby the speeds in the Beaufort Scale are divided into ranges. The speed is measured 10 meters above the ground. This corresponds to 64 knots, The last stage in the Beaufort Scale is called a hurricane and is described with devastation.
For each scale classification there is a description of the effect on nature. In the table you will find the effects on the land. Primarily in relation to the effects on trees. In the scale was extended by 5 wind forces. A storm is a strong wind that is often used as a description in a nautical context. The U. Weather forecasts usually give storm warnings when winds of this strength are expected.
Wind information page. This wind makes it difficult to drive large cars. This strong wind can damage trees, power lines and small structures. Gusts of 30 knots can be dangerous in the last part of a landing approach. The most dangerous gust is a sudden tail wind.
For example, suppose an aircraft flies in the landing configuration at approximately 1. For example, if the average wind speed is 25 knots, it is normal for gusts of 35 knots and lighter gusts to occur.
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