Category: Define

Crystallization The process of a substance going directly from a vapor form (water vapor) to a solid (ice) at the same temperature, without going through

DivergenceWind movement that results in a horizontal net outflow of air from a particular region. Divergence at lower levels is associated with a downward movement

Doppler Radar Weather radar that measures direction and speed of a moving object, such as drops of precipitation, by determining whether atmospheric motion is horizontally

Downburst A severe localized downdraft from a thunderstorm or shower. This outward burst of cool or colder air creates damaging winds at or near the

Cumuliform Clouds composed of water droplets that exhibit vertical development. The density of the droplets often blocks sunlight, casting shadows on the earth’s surface. With

Downdraft A sudden descent of cool or cold air to the ground, usually with precipitation, and associated with a thunderstorm or shower. Precipitation Any and

Cumulonimbus A vertically developed cumulus cloud, often capped by an anvil-shaped cirriform cloud. Also called a thunderstorm cloud, it is frequently accompanied by heavy showers,

Drizzle Slowly falling precipitation in the form of tiny water droplets with diameters less than 0.02 inches or 0.5 millimeters. It falls from stratus clouds

Drought Abnormal dry weather for a specific area that is sufficiently prolonged for the lack of water to cause serious hydrological imbalance. Weather The state

Cumulus One of the three basic cloud forms (the others are cirrus and stratus). It is also one of the two low cloud types. A