Weather Flashcards
Humidity
the state or quality of being humid.
Cumulus Cloud
Cumulus clouds are clouds which have flat bases and are often described as “puffy”, “cotton-like” or “fluffy” in appearance. Their name derives from the Latin cumulo-, meaning heap or pile.
Stratus Cloud
Stratus clouds are low-level clouds characterized by horizontal layering with a uniform base, as opposed to convective or cumuliform clouds that are formed by rising thermals.
Cirrus Cloud
Cirrus is a genus of high cloud made of ice crystals. Cirrus clouds typically appear delicate and wispy with white strands. Cirrus are usually formed as warm, dry air rises, causing water vapor deposition onto rocky or metallic dust particles at high altitudes.
Cumulonimbus Cloud
Cumulonimbus is a dense, towering vertical cloud, forming from water vapor carried by powerful upward air currents. If observed during a storm, these clouds may be referred to as thunderheads. Cumulonimbus can form alone, in clusters, or along cold front squall lines
Condensation
water which collects as droplets on a cold surface when humid air is in contact with it.
Evaporation
the process of turning from liquid into vapor.
Precipitation
the action or process of precipitating a substance from a solution.
Runoff
the draining away of water (or substances carried in it) from the surface of an area of land, a building or structure, etc.
Rain
moisture condensed from the atmosphere that falls visibly in separate drops.
Sleet
a form of precipitation consisting of ice pellets, often mixed with rain or snow.
Snow
atmospheric water vapor frozen into ice crystals and falling in light white flakes or lying on the ground as a white layer.
Hail
pellets of frozen rain which fall in showers from cumulonimbus clouds.
Polar – Maritime Airmass
air coming originally from polar regions but having humidity and temperature properties modified by passing over relatively warm oceans.
Tropical – Maritime Airmass
air of a mass originating over tropical oceans and characterized by high temperature and humidity