::Freezing rain


Freezing::layer    Glaze::freezing    Ground::storm    Weather::power    Radar::aircraft    Thumb::surface

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}} Freezing rain is the name given to rain that falls when surface temperatures are below freezing. Unlike a mixture of rain and snow, ice pellets (both of which are sometimes called "sleet"), or hail, freezing rain is made entirely of liquid droplets. The raindrops become supercooled while passing through a sub-freezing layer of air many hundreds of feet above the ground, and then freeze upon impact with any surface they encounter.<ref>Glossary of Meteorology. F. Retrieved on 2008-02-17.</ref> The resulting ice, called glaze, can accumulate to a thickness of several centimeters. The METAR code for freezing rain is FZRA.

A storm that produces a significant thickness of glaze ice from freezing rain is often referred to as an ice storm. Although not violent storms, freezing rain is notorious for causing travel problems on roadways, breaking tree limbs, and downing power lines from the weight of accumulating ice. It is also known for being extremely dangerous to aircraft since the ice can effectively 'remould' the shape of the airfoil and flight control surfaces. (See atmospheric icing.)<ref>National Weather Service Forecast Office, La Crosse, Wisconsin. Significant Weather Phenomena Matrix. Retrieved on 2006-12-08.</ref>

Freezing rain sections
Intro   Mechanism    Observations    Effects    See also    References    External links   

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