Cubic Feet Per SecondA unit expressing rates of discharge. One cubic foot per second is equal to the discharge through a rectangular cross section, 1 foot wide by 1 foot deep…
CumuliformDescriptive of all clouds with vertical development in the form of rising mounds, domes, or towers
Cumuliform AnvilA thunderstorm anvil with visual characteristics resembling cumulus-type clouds (rather than the more typical fibrous appearance associated with cirrus).
CumulonimbusA cloud belonging to a class indicative of thunderstorm conditions characterized by large, dense towers that often reach altitudes of 30,000 feet (9000…
Cumulus(Abbrev. CU) - detached clouds, generally dense and with sharp outlines, showing vertical development in the form of domes, mounds, or towers.
Cumulus BuildupsClouds which develop vertically due to unstable air. Characterized by their cauliflower-like or tower-like appearance of moderately large size
Cumulus CongestusA large, towering cumulus cloud with great vertical development, usually with a cauliflower-like appearance, but lacking the characteristic anvil of a…
cup anemometerAn instrument used to monitor wind speed. Wind rotation of cups generates and electric current calibrated in wind speed.
CurrentA horizontal movement of water. Currents may be classified as tidal and nontidal.
Current MeterDevice used to measure the water velocity or current in a river.
Curtain DrainA drain constructed at the upper end of the area to be drained, to intercept surface or ground water flowing toward the protected area from higher ground…
CutoffAn impervious construction by means of which water is prevented from passing through foundation material.
Cutoff LowA closed upper-level low which has become completely displaced (cut off) from basic westerly current, and moves independently of that current.
CYCCyclone- A large-scale circulation of winds around a central region of low atmospheric pressure, counterclockwise in the Northern Hemisphere, clockwise in…
CYCLGNCyclogenesis - The formation or intensification of a cyclone or low-pressure storm system.
Cyclic StormA thunderstorm that undergoes cycles of intensification and weakening (pulses) while maintaining its individuality.
Cyclogenesis(Abbrev. CYCLGN) - The formation or intensification of a cyclone or low-pressure storm system.
CyclolysisCyclolysis Process of weakening or terminating of a cyclonic circulation in the atmosphere; the opposite of cyclogenesis.
Cyclone(abbrev. CYC) - A large-scale circulation of winds around a central region of low atmospheric pressure, counterclockwise in the Northern Hemisphere…
Cyclone movementCyclone movement The spatial displacement of a center of low pressure caused by the local redistribution of mass in the atmosphere.
Cyclonic CirculationCirculation (or rotation) which is in the same sense as the Earth's rotation, i.e.