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condensation funnel

meteorology

Quick Summary

A condensation funnel, often called a funnel cloud, is a visible, tapered column of water droplets extending from the base of a parent cloud. It is a key characteristic of a tornado, though a tornado can exist without a visible funnel. The funnel cloud's size and shape can change, reflecting variations in wind intensity and moisture content. It typically outlines only the innermost core of the tornado's circulation. The formation of a condensation funnel occurs when rising air in the tornado's core cools to its dew point, causing water vapor to condense onto tiny particles called condensation nuclei. This process gives the cloud its characteristic funnel shape.1234

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