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Definitions (3112)

1

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a


A1. Abbrevation for hail in weather observations. 2. Symbol used on long-term climate outlooks issued by CPC to indicate areas that are likely to be above normal for the specified parameter (temperature, precipitation, etc.).
Source: forecast.weather.gov

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a ams


Arctic Air Mass
Source: forecast.weather.gov

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a index


A daily index of geomagnetic activity derived as the average of the eight 3-hourly a indices.
Source: forecast.weather.gov

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aaas


American Association for the Advancement of Science
Source: forecast.weather.gov

5

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aawu


Alaskan Aviation Weather Unit
Source: forecast.weather.gov

6

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ablation


Depletion of snow and ice by melting and evaporation.
Source: forecast.weather.gov

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abndt


Abundant
Source: forecast.weather.gov

8

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absolutely stable air


An atmospheric condition that exists when the environmental lapse rate is less than the moist adiabatic lapse rate.
Source: forecast.weather.gov

9

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absolutely unstable air


An atmospheric condition that exists when the environmental lapse rate is greater than the dry adiabatic lapse rate.
Source: forecast.weather.gov

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absorption


The process in which incident radiant energy is retained by a substance by conversion to some other form of energy.
Source: forecast.weather.gov


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