Subj : Wx Terms (C)(7)
To : All
From : Daryl Stout
Date : Sat Nov 04 2017 12:05 am
Cryology
The science of the physical aspects of snow, ice, hail, and sleet and
other forms of water produced by temperatures below 0� Celsius.
CSDRBL
Considerable
CSI
Conditional Symmetric Instability
CST
Central Standard Time
CSTL
coastal
CTY
city
CU
Cumulus clouds - Detached clouds, generally dense and with sharp
outlines, showing vertical development in the form of domes, mounds,
or towers. Tops normally are rounded while bases are more horizontal.
See Cb, towering cumulus.
Cubic Feet per Second
(Abbrev. CFP) - In hydrologic terms, a 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, flowing at an
average velocity of 1 foot per second. It is also approximately 7.48
gallons per second.
CUFRA
Cumulus Fractus
Cumuliform
Descriptive of all clouds with vertical development in the form of
rising mounds, domes, or towers.
Cumuliform Anvil
A thunderstorm anvil with visual characteristics resembling cumulus-type
clouds (rather than the more typical fibrous appearance associated with
cirrus). A cumuliform anvil arises from rapid spreading of a
thunderstorm updraft, and thus implies a very strong updraft. See
anvil rollover, knuckles, mushroom.
Cumulus
(Abbrev. CU) - detached clouds, generally dense and with sharp outlines,
showing vertical development in the form of domes, mounds, or towers.
Tops normally are rounded while bases are more horizontal. See Cb,
towering cumulus.
Cumulus Buildups
Clouds which develop vertically due to unstable air. Characterized by
their cauliflower-like or tower-like appearance of moderately large size.
Cumulus Congestus
A large, towering cumulus cloud with great vertical development, usually
with a cauliflower-like appearance, but lacking the characteristic anvil
of a cumulonimbus.
Current
A horizontal movement of water. Currents may be classified as tidal and
nontidal. Tidal currents are caused by gravitational interactions
between the sun, moon, and earth and are a part of the same general
movement of the sea that is manifested in the vertical rise and fall,
called TIDE. Tidal currents are periodic with a net velocity of zero
over the tidal cycle. Nontidal currents include the permanent currents
in the general circulatory systems of the sea as well as temporary
currents arising from more pronounced meteorological variability. The
SET of a current is the direction toward which it flows; the DRIFT is
its speed.
Current Meter
In hydrologic terms, device used to measure the water velocity or current
in a river.
Curtain Drain
In hydrologic terms, a 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, and carry it away from the area. Also
called an Intercepting Drain.
Cutoff
In hydrologic terms, from passing through a dam's foundation material.
An impervious construction or material which reduces seepage or prevents
it.
Cutoff Low
A closed upper-level low which has become completely displaced (cut off)
from basic westerly current, and moves independently of that current.
Cutoff lows may remain nearly stationary for days, or on occasion may
move westward opposite to the prevailing flow aloft (i.e., retrogression).
"Cutoff low" and "closed low" often are used interchangeably to describe
low pressure centers aloft. However, not all closed lows are completely
removed from the influence of the basic westerlies. Therefore, the
recommended usage of the terms is to reserve the use of "cutoff low" only
to those closed lows which clearly are detached completely from the
westerlies.
CVR
Cover
CWA
County Warning Area
CWFA
County Warning and Forecast Area
CYC
Cyclone- A large-scale circulation of winds around a central region of
low atmospheric pressure, counterclockwise in the Northern Hemisphere,
clockwise in the Southern Hemisphere.
CYCLGN
Cyclogenesis - The formation or intensification of a cyclone or
low-pressure storm system.
Cyclic Storm
A thunderstorm that undergoes cycles of intensification and weakening
(pulses) while maintaining its individuality. Cyclic supercells are
capable of producing multiple tornadoes (i.e., a tornado family)
and/or several bursts of severe weather.
Cyclogenesis
(Abbrev. CYCLGN) - The formation or intensification of a cyclone or
low-pressure storm system.
Cyclone
(abbrev. CYC) - A large-scale circulation of winds around a central
region of low atmospheric pressure, counterclockwise in the Northern
Hemisphere, clockwise in the Southern Hemisphere.
Cyclonic Circulation
Circulation (or rotation) which is in the same sense as the Earth's
rotation, i.e., counterclockwise (in the Northern Hemisphere) as would
be seen from above. Nearly all mesocyclones and strong or violent
tornadoes exhibit cyclonic rotation, but some smaller vortices, such
as gustnadoes, occasionally rotate anticyclonically (clockwise).
Compare with anticyclonic rotation.
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