Clouds and Precipitation online meteorology guide
Graphic by: Yiqi Shao ...
**Clouds**
If the cooling continues, the clouds will become denser, and if the temperature is above freezing, (32 degs. F.), rain may occur.
If the temperature is below 32 degs. F., snow or sleet, and in extreme cases, hail may occur.
Category:Clouds, fog and precipitation
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Low-level clouds (St, Sc, Ns) Stratus, Stratocumulus, and in some degree, Nimbostratus are low clouds.
Cbs, towering cumulus clouds, and ACCAS clouds all are visible forms of convection. However, convection is not always made visible by clouds.
Clouds that warm
Clouds that cool
Objectives
By the end of this lesson the student will: ...
Clouds
cloud formation: cloud-condensation nuclei, cloud droplets
For condensation to occur at the dew point water vapor needs a surface to condense on.
Clouds of Vertical Development - A cloud that has its base iii the low height range but extends upward into the middle or high altitudes.
Clouds A visible mass of water vapor suspended in the atmosphere above Earth's surface. Clouds form in areas where air rises and cools.
Few Clouds
An official sky cover classification for aviation weather observations, descriptive of a sky cover of 1/8 to 2/8.
Low clouds
Clouds with bases below 6000 feet and are stratiform or cumuliform in variety.
Low latitudes ...
Low Clouds The bases of these clouds range from near the surface to about 6,500 feet in middle latitudes. These clouds are almost entirely of water, but the water may be supercooled at sub-freezing temperatures.
high clouds - See cloud classification.
horizon - One of several lines or planes used as reference for observation and measurement relative to a given location on the surface of the earth, and referred generally to a horizontal direction (i.e.
Wall Clouds - A local and often abrupt lowering of a rain-free cumulonimbus base into a low-hanging accessory cloud, from 1 to 4 miles in diameter.
HIGH CLOUDS
A term used to signify cirriform clouds that are composed of ice crystals and generally have bases above 20,000 feet. The main types of high clouds are cirrus,cirrocumulus, and cirrostratus. This altitude applies to the temperate zone.
High Clouds
These clouds have bases between 16,500 and 45,000 feet in the mid latitudes. At this level they are composed of primarily of ice crystals. Some clouds at this level are cirrus, cirrocumulus, and cirrostratus
High Energy Event ...
Cold clouds Clouds composed of ice crystals or supercooled water droplets or a mixture of both which have temperatures below 0 ·C (32 ·F).
high clouds: clouds found between 3-8 kilometers (10000-25000 feet) in polar regions and 6-18 kilometers (20000-60000 feet) in tropical regions. Contains cirriform clouds (cirrus, cirrocumulus, and cirrostratus).
Scud Clouds- Small, ragged, low cloud fragments that are unattached to a larger cloud base and often seen with and behind cold fronts and thunderstorm gust fronts.
Rogue Clouds The term "rogue clouds" appeared in some of the forecast discussions this week (Greg Tipton with the National Weather Service used it).
BROKEN CLOUDS: Clouds which cover between 6/10 and 9/10 of the sky.
CAA: Cold Air Advection.
CEILING: The height of the lowest layer of clouds, when the sky is broken or overcast.
BROKEN CLOUDS: Clouds which cover between 6/10 and 9/10 of the sky. See Sky Terminology.
CAA: Cold Air Advection
CEILING: The height of the lowest layer of clouds, when the sky is broken or overcast.
middle clouds"See cloud classification.
middle infrared"The portion of the electromagnetic spectrum lying between the near-infrared and the far infrared. This covers the wavelength range approximately from 4 to 15 μm, but usage varies.
MIDDLE CLOUDS
A term used to signify clouds with bases between 6,000 and 18,000 feet. At the higher altitudes, they may also have some ice crystals, but they are composed mainly of water droplets.
Billow clouds Broad, nearly parallel lines of clouds oriented at right angles to the wind.
Clouds of unknown composition that have a soft, pearly luster and that form at altitudes about 25 to 30 km above the Earth's surface. They are also called "mother-of-the-pearl clouds." ...
Clouds - A visible collection of tiny water droplets or, at colder temperatures, ice crystals floating in the air above the surface. Clouds come in many different sizes and shapes.
Clouds that form in sheets or layers often associated with weather fronts.
Levanter
a humid easterly wind that affects the Straits of Gibraltar mainly in summer or early autumn.
Clouds that look like pouches hanging from the underside of a cloud.
Marine climate(6)
A climate dominated by the ocean, because of the moderating effect of water, sites having this climate are considered relatively mild.
Clouds which develop vertically due to unstable air. Characterized by their cauliflower-like or tower-like appearance of moderately large size
Cumulus Congestus ...
CAP CLOUDS - Convective clouds developing in neutral or de-stabilizing air over a pre-existing thermal from a forest fire or other similar heat source.
High clouds are primarily composed of ice crystals; Medium clouds are a mixture of water droplets (usually super-cooled) and ice crystals, in varying proportion, and low clouds primarily water droplets, ...
Mamma Clouds - Also called mammatus, these clouds appear as hanging, rounded protuberances or pouches on the under-surface of a cloud. With thunderstorms, mammatus are seen on the underside of the anvil.
How do Clouds Form?
Find the answer to all your weather science questions. Many answers include demonstrations, videos, and photos to help you understand cloud formation.
Billow clouds - bands of cloud stretching across the wind field.
Cap cloud - one that sits still over a mountain ...
CUMULUS CLOUDS - Puffy clouds caused by small areas of lifting air.
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Mammatus Clouds - Rounded, smooth, sack-like protrusions hanging from the underside of a cloud (usually a thunderstorm anvil).
SCATTERED CLOUDS: A sky condition when between 1/10 and 5/10 of the sky is covered by clouds.
Mammatus Clouds - cloud features resembling pouches which hang from the underside of a cloud (usually a thunderstorm anvil) and are typically associated with intense cumulonimbus clouds ...
Clouds composed of small particles, mostly ice crystals. Because the particles are fairly widely dispersed, this usually results in relative transparency and whiteness, often producing a halo phenomena not observed in other clouds forms.
The Book of Clouds by John A. Day
National Audubon Society First Field Guide: Weather by John A. Day and Vincent J. Schaefer
The Weather Identification Handbook by Storm Dunlop
Extreme Weather by Chris Burt ...
Convective clouds: A cloud that results from convection.
Convergence: The horizontal coming-together of air that can lead to lifting.
Convective Clouds The vertically developed family of clouds are cumulus and cumulonimbus. The height of their bases range from as low as 1,000 feet to a bit more than 10,000 feet.
NOCTILUCENT CLOUDS Rarely seen clouds of tiny ice particles that form approximately 75 to 90 kilometers above the earth's surface. They have been seen only during twilight (dusk and dawn) during the summer months in the higher latitudes.
Lenticular Clouds - A cloud that generally has the form of a smooth lens. They usually appear in formation as the result of oragraphic origin. Viewed from the ground, the clouds appear stationary as the air rushes through them.
noctilucent clouds—Clouds of unknown composition which occur at great heights, probably around 75 to 90 kilometers.
Cumulus - 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.
Cirrus
Detached clouds in the form of white, delicate filaments or white or mostly white patches or narrow bands. These clouds have a fibrous (hair-like) appearance, or a silky sheen, or both.
CU FIELD- Cumulus clouds covering a large spatial area.
CUT-OFF LOW- Closed lows that become cut-off from the main flow pattern are called cut-off lows. Click here for a cut-off low example.
CWA- County Warning Area ...
The structure typically is most pronounced on the leading edge of the updraft, while drier air from the rear flank downdraft often erodes the clouds on the trailing side of the updraft.BarometerAn instrument for measuring atmospheric pressure.
Some of the information that is gathered by weather satellites, such as GOES9, includes upper air temperatures and humidity, recording the temperatures of cloud tops, land, and ocean, monitoring the movement of clouds to determine upper level wind ...
Chinook ArchA foehn cloud formation appearing as a bank of altostratus clouds east of the Rocky Mountains, heralding the approach of a chinook. It forms in the rising portion of standing waves on the lee side of the mountains.
Scud Ragged low clouds, usually stratus fractus. Most often applied when such clouds are moving rapidly beneath a layer of nimbostratus.
These clouds are of high altitude (20,000-40,000 feet or 6000-12,000 meters).cirrostratusA cloud belonging to a class characterized by a composition of ice crystals and often by the production of halo phenomena.
Clouds may be classified on their visible appearance, height, or form.
Unstable AirAir that is able to rise easily, and has the potential to produce clouds, rain, and thunderstorms.
Roll clouds, or arches, may form around the periphery of the storm. There may be rotation in a horizontal plane as well, and lowering of pressure can produce a mesocyclone, a miniature rotating low.
Wall clouds can range from a fraction of a mile up to nearly five miles in diameter, and normally are found on the south or southwest (inflow) side of the thunderstorm.
A defining characteristic is that it often appears as a wavy billowy layer of cloud, giving it the nickname of "sheep" or "woolpack" clouds.
Cirrus - High-level clouds (5,000 metres or more), composed of ice crystals and appearing in the form of white, delicate filaments or white or mostly white patches or narrow bands.
 See also: Cloud, Air, Weather, Surface, Water
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