Advisory – Definition
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, but, if not observed, could lead...
View ArticleAir – Definition
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 78.09%, Oxygen (O2) at 20.946%, Argon (A) at 0.93%, and...
View ArticleAtlantic Hurricane Florence – 2018
Atlantic Hurricane Florence is currently a Category 4 and is heading direct for North and South Carolina. It is expected to start some time on Thursday – September 13, 2018 – and go through the...
View ArticleAir Mass – Definition
Air Mass An extensive body of air throughout which the horizontal temperature and moisture characteristics are similar. Air This is considered the mixture of gases that make up the earth’s atmosphere....
View ArticleAlbedo – Definition
Albedo The ratio of the amount of radiation reflected from an object’s surface compared to the amount that strikes it. This varies according to the texture, color, and expanse of the object’s surface...
View ArticleAltimeter – Definition
Altimeter An instrument used to determine the altitude of an object with respect to a fixed level. The type normally used by meteorologists measures the altitude with respect to sea level pressure....
View ArticleAltitude – Definition
Altitude In meteorology, the measure of a height of an airborne object in respect to a constant pressure surface or above mean sea level. Meteorology / Meteorologist The science and study of the...
View ArticleAltocumulus – Definition
Altocumulus Composed of flattened, thick, gray, globular masses, this middle cloud genus is primarily made of water droplets. In the mid-latitudes, cloud bases are usually found between 8,000 and...
View ArticleAltostratus – Definition
Altostratus This middle cloud genus is composed of water droplets, and sometimes ice crystals, In the mid-latitudes, cloud bases are generally found between 15,000 and 20,000 feet. White to gray in...
View ArticleAnemometer – Definition
Anemometer An instrument that measures the speed or force of the wind. Wind Speed The rate of the motion of the air on a unit of time. It can be measured in a number of ways. In observing, it is...
View ArticleHurricanes Florence and Gordon Time-Lapse Video From Space
The post Hurricanes Florence and Gordon Time-Lapse Video From Space appeared first on Accordion Hurricane Shutters, Impact Windows and Doors.
View ArticleAnticyclone – Definition
Anticyclone A relative pressure maximum. An area of pressure that has diverging winds and a rotation opposite to the earth’s rotation. This is clockwise the Northern Hemisphere and counter-clockwise...
View ArticleAnvil – Definition
Anvil The upper portion of a cumulonimbus cloud that becomes flat and spread-out, sometimes for hundreds of miles downstream from the parent cloud. It may look smooth or fibrous, but in shape, it...
View ArticleAphelion – Definition
Aphelion The point on the earth’s orbit that is farthest from the sun. Although the position is part of a 21,000 year cycle, currently it occurs around July, when the earth is about 3 million miles...
View ArticleApogee – Definition
Apogee The point farthest from the earth on the moon’s orbit. This term can be applied to any other body orbiting the earth, such as satellites. It is the opposite of perigee. Satellite Any object...
View ArticleArid – Definition
Arid A term used for an extremely dry climate. The degree to which a climate lacks effective, life-promoting moisture. It is considered the opposite of humid when speaking of climates. Climate The...
View ArticleAtmosphere – Definition
Atmosphere The gaseous or air portion of the physical environment that encircles a planet. In the case of the earth, it is held more or less near the surface by the earth’s gravitational attraction....
View ArticleAtmospheric Pressure – Definition
Atmospheric Pressure The pressure exerted by the atmosphere at a given point. Its measurement can be expressed in several ways. One is in millibars. Another is in inches or millimeters of mercury...
View ArticleAutumn – Definition
Autumn The season of the year which occurs as the sun approaches the winter solstice, and characterized by decreasing temperatures in the mid-latitudes. Customarily, this refers to the months of...
View ArticleBall Lightning – Definition
Ball Lightning A relatively rare form of lightning consisting of a luminous ball, often reddish in color, which moves rapidly along solid objects or remains floating in mid-air. Lightning A sudden and...
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