w1.weather.gov

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Definitions (3118)

1

a

1. 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.).

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2

a ams

Arctic Air Mass

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3

a index

A daily index of geomagnetic activity derived as the average of the eight 3-hourly a indices.

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4

aaas

American Association for the Advancement of Science

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5

aawu

Alaskan Aviation Weather Unit

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6

ablation

Depletion of snow and ice by melting and evaporation.

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7

abndt

Abundant

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8

absolutely stable air

An atmospheric condition that exists when the environmental lapse rate is less than the moist adiabatic lapse rate.

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9

absolutely unstable air

An atmospheric condition that exists when the environmental lapse rate is greater than the dry adiabatic lapse rate.

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10

absorption

The process in which incident radiant energy is retained by a substance by conversion to some other form of energy.

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