Subj : Wx Terms (C)(4)
To   : All
From : Daryl Stout
Date : Tue Jul 04 2017 12:04 am

Cloud Condensation Nuclei
Small particles in the air on which water vapor condenses and forms
cloud droplets.

Cloud Layer
An array of clouds whose bases are at approximately the same level.

Cloud Movement
The direction toward which a cloud is moving.

Cloud Streets
Rows of cumulus or cumulus-type clouds aligned parallel to the
low-level flow. Cloud streets sometimes can be seen from the ground,
but are seen best on satellite photographs.

Cloud Tags
Ragged, detached cloud fragments; fractus or scud.

CLR
Clear

CLRG
Clearing

Clutter
Radar echoes that interfere with observation of desired signals on the
radar display.

CMPLT
Complete

CMPLX
Complex

CNIF
In hydrologic terms, Calibration Network Information Files.

CNTR
Center

CNTRL
Central

CNVG
Converge

CNVTV
Convective

Coalescence
The process by which water droplets in a cloud collide and come together
to form raindrops.

Coastal Waters
Includes the area from a line approximating the mean high water along
the mainland or island as far out as 100 nautical miles including the
bays, harbors and sounds.

Coastal Waters Forecast (CWF)
The marine forecast for areas, including bays, harbors, and sounds, from
a line approximating the mean high water mark (average height of high
water over a 19-year period) along the mainland or near shore islands
extending out to as much as 100 NM.

Coastal/Lakeshore Flood Advisory
Minor flooding is possible (i.e., over and above normal high tide levels.
Coastal/Lakeshore Flood Advisories are issued using the Coastal/Lakeshore
Hazard Message (CFW) product.

Coastal/Lakeshore Flood Warning
Flooding that will pose a serious threat to life and property is
occurring, imminent or highly likely. Coastal/Lakeshore Flood Warnings
are issued using the Coastal/Lakeshore Hazard Message (CFW) product.

Coastal/Lakeshore Flood Watch
Flooding with significant impacts is possible. Coastal/Lakeshore Flood
Watches are issued using the Coastal/Lakeshore Hazard Message (CFW)
product.

Coastal/Lakeshore Flooding

(i) (Oceanic) Coastal Flooding is the inundation of land areas adjacent
to bodies of salt water connected to the Atlantic Ocean, Pacific Ocean,
or Gulf of Mexico, caused by sea waters over and above normal tidal
action. This flooding may impact the immediate oceanfront, gulfs, bays,
back bays, sounds, and tidal portions of river mouths and inland tidal
waterways.

(ii) Lakeshore Flooding is the inundation of land areas adjacent to one
of the Great Lakes caused by lake water exceeding normal levels.
Lakeshore flooding impacts the immediate lakefront, bays, and the
interfaces of lakes and connecting waterways, such as rivers.

COE
In hydrologic terms, Corps of Engineers.

Cold Advection
Transport of cold air into a region by horizontal winds.

Cold Air Avalanche
Downslope flow pulsations that occur at more or less regular intervals as
cold air builds up on a peak or plateau, reaches a critical mass, and
then cascades down the slopes.

Cold Air Dam
A shallow cold air mass which is carried up the slope of a mountain
barrier, but with insufficient strength to surmount the barrier. The
cold air, trapped upwind of the barrier alters the effective terrain
configuration of the barrier to larger-scale approaching flows.

Cold Air Damming (CAD)
The phenomenon in which a low-level cold air mass is trapped
topographically. Often, this cold air is entrenched on the east side
of mountainous terrain. Cold Air Damming often implies that the trapped
cold air mass is influencing the dynamics of the overlying air mass,
e.g. in an overrunning scenario. Effects on the weather may include
cold temperatures, freezing precipitation, and extensive cloud cover.

Cold Air Funnel
A funnel cloud or (rarely) a small, relatively weak tornado that can
develop from a small shower or thunderstorm when the air aloft is
unusually cold (hence the name). They are much less violent than other
types of tornadoes.

Cold Front
A zone separating two air masses, of which the cooler, denser mass is
advancing and replacing the warmer.

Cold Occlusion
A frontal zone formed when a cold front overtakes a warm front and,
being colder than the air ahead of the warm front, slides under the
warm front, lifting it aloft. Compare with warm occlusion.

Cold Pool
A region of relatively cold air, represented on a weather map analysis
as a relative minimum in temperature surrounded by closed isotherms.
Cold pools aloft represent regions of relatively low stability, while
surface-based cold pools are regions of relatively stable air.

Collar Cloud
A generally circular ring of cloud that may be observed on rare
occasions surrounding the upper part of a wall cloud. This term
sometimes is used (incorrectly) as a synonym for wall cloud.

Collection Efficiency
The fraction of droplets approaching a surface that actually deposit
on that surface.

Colorado Low
A low pressure storm system that forms in winter in southeastern
Colorado or northeastern New Mexico and tracks northeastward across
the central plains of the U.S. over a period of several days,
producing blizzards and hazardous winter weather.

Columnar Ice
In hydrologic terms, ice consisting of columnar shaped grain. The
ordinary black ice is usually columnar-grained.

Combined Seas
Combination of both wind waves and swell. Also called "Seas" and is
approximately equal to significant wave height.

Comma Cloud
A synoptic scale cloud pattern with a characteristic comma-like shape,
often seen on satellite photographs associated with large and intense
low-pressure systems.

Comma Echo
A thunderstorm radar echo which has a comma-like shape. It often
appears during latter stages in the life cycle of a bow echo.

Complex Gale/Storm
In the high seas and offshore forecasts, an area for which gale/storm
force winds are forecast or are occurring but for which no single
center is the principal generator of these winds.

Complex Terrain
Typically used to refer to mountainous terrain. In general usage, it
may also refer to coastal regions and heterogeneous landscapes.

Composite
An average that is calculated according to specific criteria. For
example, one might want a composite for the rainfall at a given
location for all years where the temperature was much above average.

Composite Hydrograph
A stream discharge hydrograph which includes base flow, or one which
corresponds to a net rain storm of duration longer than one unit
period.



---
� Synchronet � The Thunderbolt BBS - wx1der.dyndns.org

You are viewing proxied material from bbs.kd3.us. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.