Level 4 wind is a wind on the Beaufort scale with a wind speed of 5.5 to 7.9 m/s, 20 to 28 km/h, also known as gentle wind, with a wind pressure of 18.9 to 39 Pa. It may explode. dust, paper and tree twigs on the ground. Slight movement, the wind is generally light. When the fishing boat has full sails, it tilts to one side and the wind is good for fishing. The small waves on the sea are getting higher and higher, and the foam on the wave crests is getting stronger and stronger. dust and sand are flying, pieces of paper are flying, and small tree trunks are shaking.
How strong is the level 4 wind?
1. Level 4 wind is a light breeze. The wind speed of a category 4 typhoon is about 115 to 135 knots, and the sustained wind speed in one minute is 59 to 69 m/s, which corresponds to category 17 or above. As the saying goes: when the wind reaches theIn category 4, dust appears. will explode, and the crests of the small waves will be white foam. Level 4 winds are called gentle breezes. Tree twigs shake and can blow dust and paper onto the ground.
2. Wind speed is often expressed by several wind levels. The wind level is determined based on the impact of the wind on objects on the ground. Meteorologically, winds are generally divided into twelve levels according to their strength.
Level 4 winds are called mild winds, with wind speeds of 5.5 to 8.0 meters/second.
Level 4 winds can blow dust and paper onto the ground and cause slight movement of tree branches. Generally speaking, the level 4 wind strength is relatively weak and belongs to the light to medium intensity wind. Wind force refers to the force exerted by wind blowing on an object. The speed of the windt is the wind speed. The greater the difference in air pressure between two adjacent places, the faster the air flows, the greater the wind speed, and the greater the wind power. Therefore, wind force is used to express the size of the wind. The unit of wind speed is expressed in meters per second or kilometers per hour. When issuing weather forecasts, wind levels are usually used.