Category: Define

Mesocyclone A area of rotation of storm size that may often be found on the southwest part of a supercell. Its circulation can be larger

Mesosphere The layer of the atmosphere located between the stratosphere and the ionosphere, where temperatures drop rapidly with increasing height. It extends between 31 and

Meteorology / Meteorologist The science and study of the atmosphere and atmospheric phenomena. Various areas of meteorology include agricultural, applied, astrometerology, aviation, dynamic, hydrometeorology, operational,

Absolute Humidity A type of humidity that considers the mass of water vapor present per unit volume of space. Also considered as the density of

Absolute Temperature Scale A temperature scale with a freezing point of water of +273°K (Kelvin) and a boiling point of +373°K. Temperature The measure of

Absolute Zero Considered to be the point at which theoretically no molecular activity exists or the temperature at which the volume of a perfect gas

Absorption The process in which incident radiant energy is retained by a substance. The absorbed radiation is then transformed into molecular energy. Radiation The process

Advection The horizontal transfer of any property in the atmosphere by the movement of air (wind). Examples include heat and moisture advection. Atmosphere The gaseous

Advisory Statements that are issued by the National Weather Service for probable weather situations of inconvenience that do not carry the danger of warning criteria,

Air This is considered the mixture of gases that make up the earth’s atmosphere. The principal gases that compose dry air are Nitrogen (N2) at