wind velocity
Quick Summary
Wind velocity refers to the speed and direction of air movement relative to the Earth's surface. This movement is driven by differences in atmospheric pressure. The Beaufort scale, originally devised in 1805, categorizes wind force using numbers from 0 to 12, based on observable effects on the sea and land. While no longer the primary tool for professional meteorologists, it remains useful for estimating wind characteristics over areas without instruments. Wind speeds typically exceeding 55 km (34 miles) per hour can cause damage and are often classified as windstorms.1234
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- climateConditions associated with cyclone formation
In its formative stage the winds are below hurricane force, and the central pressure is about 1,000 millibars, or 750 mm (29.53 inches) of mercury. The formative period is extremely variable in length, ranging from 12 hours to a few days. This stage is followed by a period of intensification,…
Read MoreIn its formative stage the winds are below hurricane force, and the central pressure is about 1,000 millibars, or 750 mm (29.53 inches) of mercury. The formative period is extremely variable in length, ranging from 12 hours to a few days. This stage is followed by a period of intensification,…
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VenusThe atmosphere of VenusThe wind at the cloud tops blows from east to west at a velocity of about 100 metres per second (360 km [220 miles] per hour). This enormous velocity decreases markedly with decreasing height such that winds at the planet’s surface are quite sluggish—typically no more…
Read MoreThe wind at the cloud tops blows from east to west at a velocity of about 100 metres per second (360 km [220 miles] per hour). This enormous velocity decreases markedly with decreasing height such that winds at the planet’s surface are quite sluggish—typically no more…
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