Cold air advection Flow of air from relatively cool localities to relatively warm localities.
Cold clouds Clouds composed of ice crystals or supercooled water droplets or a mixture of both which have temperatures below 0 ·C (32 ·F).
COLD AIR FUNNEL Funnel clouds, usually short-lived, that develop from relatively small showers or thunderstorms when the air aloft is very in cold.
Cold air funnel
A funnel cloud or 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 Air Advection Transport of cold air into a region by horizontal winds.
Cold Air Damming- Cold air damming occurs when a cold dome of high pressure settles over northeastern New England. The clockwise circulation around the high pressure center brings northeasterly winds to the mid Atlantic region.
Cold Air Funnels Cold air funnels are not uncommon in Minnesota, especially in the spring. They are always quite small in scale, short-lived, and hardly ever touch the ground.
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.
CAA- Cold Air Advection, The movement of colder air horizontally toward a fixed point on the earth's surface.
CAP- Temperature inversion which prevents convection from occurring.
Cold Air Damming. 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 moves over a body of water such as the Great Lakes.
Moisture and warmth as picked up from the warmer bodies of water. (Remember, the Great Lakes don't freeze!)
That air is now warmer and therefore rises in the atmosphere.
Cold air downbursts impinging upon the tornado cause the visible funnel cloud to tilt increasingly from the vertical (usually away from the rain area).
Cold Air Occlusion Symbol:
Cold Core Weather Systems: Weather systems with the lowest temperatures at or near the center and gain their energy from the temperature variations
within the atmosphere.
A cold air mass that forms in a high-latitude source region.
Polar climates(6)
Climates in which the mean temperature of the warmest month is below 10C; climates that are too cold to support the growth of trees.
CAA: Cold Air Advection.
CEILING: The height of the lowest layer of clouds, when the sky is broken or overcast.
CHANCE: A 30, 40 or 50 percent chance of occurrence of measurable precipitation.
CAA - Cold Air Advection. The movement of colder air toward a fixed point on the earth's surface.
CALM - the absence of apparent motion in the air.
CAP - Temperature inversion which prevents convection from occurring.
StableAn atmospheric state with warm air above cold air which inhibits the vertical movement of air.
The negative phase allows cold air to plunge into the Midwestern United States and western Europe, and storms bring rain to the Mediterranean.
A fall wind is a larger-scale phenomenon than the individual-slope scale and is produced by accumulated cold air spilling down a slope or over a mountain range.
These systems are low pressure regions that form where there is a horizontal difference in wind and / or temperature, such as between a cold air mass over Canada and a warm air mass over the southern US.
A cold front occurs when a cold air mass moves into an area occupied by a warmer air mass. Moving at an average speed of about 20 mph, the heavier cold air moves in a wedge shape along the ground.
The cold air from the sea meets the warmer air from the land and creates a boundary like a shallow cold front.
In the fall months, these most often begin as "cold air funnels", being generated by a cold air mass passing over much warmer waters. Such waterspouts are generally much less intense than tornadoes and usually dissipate upon approaching shore.
(4): BULK (DOWNWARDS) ADVECTION of cold air due to drag by precipitation elements and by downdraughts in a markedly convective environment.
It is a cold air outbreak associated with the southward movement of a cold anticyclone. It is usually preceded by a warm and cloudy or rainy spell with southerly winds.
The path taken by a cold air mass largely determines the location of a snowfall, and occasionally a northward-moving pool will bring snow along the Great Divide as far north as southern Queensland.
Cold Front - an advancing edge of a cold air mass
Cold Pool - a region of relatively cold air, represented on a weather map analysis as a relative minimum in temperature surrounded by closed isotherms.
The leading edge of very cold air moving out from Polar Regions.
Arctic Sea Smoke
A shallow layer of fog formed when warmer water evaporates quickly into cold air and immediately condenses. e.g. "steam " coming out of a boiling kettle.
Cold Pool - A region of relatively cold air, represented on a weather map analysis as a relative minimum in temperature surrounded by closed isotherms.
The boundary between a cold air mass that is advancing and a relatively warmer airmass. Generally characterized by steady precipitation followed by showery precipitation.
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Weather Glossary Source List ...
A turbulent state in the atmosphere, often caused by cold air moving over warm air. Unstable conditions are also induced by cold air moving over warm water and by strong heating of the ground by the sun.
COLD FRONT - An advancing mass of cold air. The boundary formed by two air masses where cold air is replacing warmer air.
CONDENSATION - A change of state of water from a gas (water vapor) to a liquid.
Gust Front: The leading boundary of relatively cold air flowing out of a thunderstorm, usually producing gusty winds, a noticeable wind shift and temperature drop when the gust-front passes (similar to a cold front).
Arctic front - divides cold air from extremely cold air.
Frozen precipitation
Diamond dust - fine powdery ice crystals that fall in extremely cold weather, even without clouds.
Arctic (A) Air Mass - A bitterly cold air mass that forms over the frozen Arctic Ocean.
Arctic Sea Smoke - A dense and often extensive steam fog occurring over high-latitude ocean areas in winter.
Arid - See Desert.
Overrunning- The flow of warm air over cold air in advance of a warm front.
Ozone- An unstable oxygen compound that is a pollutant at ground level, but that absorbs deadly ultraviolet rays in the stratosphere.
COLD FRONT: The front edge of a cold air mass. It often produces precipitation and, frequently, severe weather.
CONDENSATION: The process by which a gas changes into a liquid.
Cold Front- the leading edge of a cold air mass as it moves toward warmer air; its movement is characterized by a drop in temperature and humidity after the front passes.
Cause: Moist air moving into cold environment, or cold air moving into moist environment.
Associated Weather: Drizzle or light snow.
Hazard Warning: Restricted visibility.
Arctic air mass Mass of very cold air in the Arctic regions which invades lower latitudes at irregular intervals.
Warm front A front that moves in such a way that warm air replaces cold air.
Warm occlusion See Occluded front.
Warm sector The region of warm air within a wave cyclone that lies between a retreating warm front and an advancing cold front.
cold front: when a colder, higher pressure air mass moves so that cold air replaces warmer air. Storm activity is often associated with the moving in of a cold front.
Cold Front-The discontinuity at the forward edge of and advancing cold air mass that is displacing a warmer and often higher in moisture air mass.
Warm Front
Any non-occluded front which moves in such a way that warm air replaces cold air.
Water Spout
A spout occurring over water; this behavior is characterized by a tendency to dissipate upon reaching shore.
Stationary front: a front between warm and cold air masses that is moving very slowly or not at all.
The boundary between two masses of air with different temperatures (ie: a mass of cold air and a mass of warm air)
G
Glacier ...
ARCTIC SEA SMOKE A type of advection fog that forms primarily over water when cold air passes across warmer waters. Related term: steam fog ...
steam fog—Fog formed when cold air moves over relatively warm water or wet ground.
Front - A boundary between two different air masses, resulting in stormy weather. A front usually is a line of separation between warm and cold air masses.
low pressure- a system in which air pressure decreases toward the center, associated with unsettled weather, usually formed by a mass of warm air being forced up by cold air.
In the atmosphere, convection usually refers to the vertical interchange of air masses. An example of convection is the rising of warm surface air and the sinking of cold air from upper levels of the atmosphere.
The term implies both poleward displacement of the cyclone and the conversion of the cyclone's primary energy source from the release of latent heat of condensation to baroclinic (the temperature contrast between warm and cold air masses) processes.
with time at a given location (e.g. from southerly to southeasterly), or change direction in a counterclockwise sense with height (e.g. westerly at the surface but becoming more southerly aloft). Backing winds with height are indicative of cold air ...
frontal inversionA temperature inversion that develops aloft when warm air overruns the cold air behind a front.
 See also: Air, Temperature, Weather, Surface, Cloud
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