A
ACID RAIN
– Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.
ADIABATIC
– changes in temperature caused by the expansion (cooling) or compression (warming) of a body of air as it rises or descends in the atmosphere.
ADNLY
– Additionally
ADVECTION
– The horizontal transport of air or atmospheric properties. Commonly used with temperatures, i.e., “warm air advection”, or moisture, i.e., “moisture advection”.
ADVISORY-
Issued for weather situations that cause significant inconveniences but do not meet warning criteria and, if caution is not exercised,
AGL
– above ground level.
AIR MASS –
A large body of air having similar horizontal temperature and moisture characteristics.