Cyclones and Fronts the development of freezing rain
In most cases, freezing rain results from the process of warm moist air "overrunning" colder air.
Cyclone (depression, low, low-pressure area) Area in the atmosphere in which the pressures are lower than those of the surrounding region at the same level.
Cyclone
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This article is about the meteorological phenomenon. For other uses of the term see Cyclone (disambiguation).
Cyclone Definition and Frequency
A tropical cyclone is a tropical depression of sufficient intensity to produce sustained gale force winds (at least 63 km/h).
cyclone"An atmospheric cyclonic circulation, a closed circulation. A cyclone's direction of rotation (counterclockwise in the Northern Hemisphere) is opposite to that of an anticyclone.
Cyclone - In general use the term cyclone is applied to any storm, especially violent, small scale circulations such as tornados, waterspouts, and dust devils.
Cyclone-An area of low atmospheric pressure characterized by rotating and converging winds and ascending air.
Dew Point Temperature-The temperature to which the air must be cooled for water vapor to reach saturation, i.e. cloud formation.
Cyclone
An atmospheric closed circulation rotating counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
Cyclone
The name for a tropical storm originating in the Indian Ocean
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Cyclone A severe tropical storm (i.e., winds >64 knots) in the Indian Ocean and Bay of Bengal. See also Hurricane and Typhoon.
CYCLONE: An area of low pressure around which winds blow counterclockwise in the Northern Hemisphere. Also the term used for a hurricane in the Indian Ocean and in the Western Pacific Ocean.
cyclone: a body of air that circulates counter clockwise and inward in the Northern Hemisphere and clockwise and inward in the Southern Hemisphere, and is associated with a low atmospheric pressure .
Cyclone - Circular wind pattern around a centre of low pressure. Clockwise in Southern Hemisphere and counter clockwise in the Northern Hemisphere, when viewed from above.
Cyclone- a body of air in which the pressure is lower than that of the surrounding air; a low or low pressure area.
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CYCLONE- This is in reference to a low pressure system.
CYCLOGENESIS- The intensification of a low pressure system.
Cyclone - In the Northern Hemisphere, a closed counter-clockwise movement of air-known as a circulation - around a low pressure centre; usually called a low The term is frequently misused to describe a tornado.
Cyclone A weather system characterized by relatively low surface air pressure compared with the surrounding air; same as a low. Viewed from above, surface winds blow counterclockwise and inward in the Northern Hemisphere.
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cyclone—(1) An area of low atmospheric pressure which has a closed circulation that is cyclonic, i.e.
Cyclones, Typhoons and Hurricanes The recent floods in Mozambique and Madagascar are the result of a very active tropical storm season in the Indian Ocean this year.
Cyclone
Large scale atmospheric circulations in which the winds rotate clockwise in the Southern Hemisphere. Cyclones are areas of low atmospheric pressure and are often associated with strong winds, cloud and rainfall.
CYCLONE An area of closed pressure circulation with rotating and converging winds, the center of which is a relative pressure minimum. The circulation is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
Cyclone An area of low atmospheric pressure that has a closed circulation. Cyclones (or more commonly called "low pressure areas") rotate counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
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 ...
Cyclone - An area of low pressure. Winds blow in a counter clockwise direction in the Northern Hemisphere and in a clockwise direction in the Southern Hemisphere. Inclimate weather is associated with a cyclone.
anticyclone: high pressure area with counterclockwise winds in the Southern Hemisphere and clockwise winds in the Northern Hemisphere.
Anticyclone: An area of high pressure, also called a High, around which the winds circulate in a clockwise direction in the Northern Hemisphere (and counter-clockwise in the Southern Hemisphere). It is usually responsible for fair, dry weather.
Mesocyclone
A storm-scale region of rotation, around 3-10 kilometres in diameter and often found in the left rear flank of a supercell (or often on the eastern, or front, flank of an HP storm).
MESOCYCLONE
A area of rotation of storm size that may often be found on the southwest part of a supercell. Its circulation can be larger than the tornado that may develop within it, but not necessarily.
ANTICYCLONE A relative pressure maximum. An area of pressure that has diverging winds and a rotation opposite to the earth's rotation. This is clockwise the Northern Hemisphere and counter-clockwise in the Southern Hemisphere.
Mesocyclone - A storm-scale region of rotation, typically around 2-6 miles in diameter. The circulation of a mesocyclone covers an area much larger than the tornado that may develop within it.
Anticyclone: An area of high pressure around which the wind blows clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere. At the center of the circulation, there is sinking air.
Cyclone
A name given to the tropical revolving storms of the Bay of Bengal and Arabian Sea. Sometimes used as a general term for tropical revolving storms of all oceans, or in the form "tropical cyclone".
Cyclone: Distribution of the atmospheric pressure in which there is a lower central pressure relating to adjacent areas. It is characterized in a synoptic chart as a system of closed isobars, involving a low central pressure.
Cyclone-A swirling center of low air pressure.
Density-The amount of mass of a substance to a given volume.
Dew point- The temperature at which condensation begins.
cyclone- a rotating mass of air with minimum pressure in its center. In the Northern Hemisphere, such winds move counterclockwise, and in the Southern Hemisphere, clockwise.
CYCLONE: An area of low pressure around which the wind circulates in a counterclockwise direction in the Northern Hemisphere. It usually produces wet weather. The term is also used for a hurricane in the Indian Ocean.
Cyclone- A low-pressure system in which winds spin inward in a counterclockwise direction in the northern hemisphere.
Depression- An area of low atmospheric temperature.
Dew- Water that condenses onto grass and other objects near the ground.
Cyclone - A low pressure system. It is a term variously applied to tornadoes, waterspouts, dust storms, hurricanes and even to any strong wind.
CYCLONE - A rotating region of low atmospheric pressure. In the northern hemisphere, cyclones rotate counter-clockwise. They rotate clockwise in the southern hemisphere. The word has Greek origins.
A cyclone or low is an area of closed isobars surrounding an area of lower pressure. The wind blows along the isobars in the direction in which the pressure gradient balances the Coriolis force.
A mesocyclone in which air from the rear-flank downdraft has completely enveloped the circulation at low levels, cutting off the inflow of warm unstable low-level air.
Oceanography ...
A tropical cyclone is the common name given for hurricanes, tropical storms, and tropical depressions together. The benefit of understanding tropical cyclone origination is a better understanding of later development.
Tropical cyclone: A low-pressure weather system in which the central core is warmer than the surrounding atmosphere. See the table below for differences between tropical and extratropical cyclones.
upper-level cyclone - (Also called upper-level low, upper cyclone, upper low, high-level cyclone, low aloft.) A cyclonic circulation existing in the upper air; specifically as seen on an upper-level constant-pressure chart.
anticyclone (high-pressure area) An atmospheric high-pressure closed circulation with clockwise rotation in the Northern Hemisphere, counterclockwise in the Southern Hemisphere, and undefined at the Equator.
Anticyclone An area of high atmospheric pressure which has a closed circulation that is anticyclonic (clockwise in northern hemisphere and counterclockwise in southern hemisphere).
Eye of a Tropical Cyclone
The relatively clear and calm area inside the circular wall of convective clouds, the geometric center of which is the center of tropical cyclone.
Blocking highA high pressure area (anticyclone), often aloft, that remains nearly stationary or moves slowly compared to west-to-east motion. It blocks the movement eastward movement of low pressure areas (cyclones) at its latitude.
Radius of Maximum WindsThe distance from the center of a tropical cyclone to the location of the cyclone's maximum winds. In well-developed hurricanes, the radius of maximum winds is generally found at the inner edge of the eyewall.
nuclear accident, toxic chemical spill, etcCenterGenerally speaking, the vertical axis of a tropical cyclone, usually defined by the location of minimum wind or minimum pressure. The cyclone center position can vary with altitude.
Storms range in scale from tornadoes and thunderstorms to tropical cyclones to synoptic-scale extratropical cyclones.
CYCLOGENESIS The process that creates a new low pressure system or cyclone, or intensifies a pre-existing one. It is also the first appearance of a trough.
AnticyclogenesisThe formation or intensification of an anticyclone or high pressure center.
Tropical Cyclone: A cyclone which forms over the tropics.
Tropical Depression: The beginning stage of a "Hurricane" with wind speeds of at least 39 mph or 63 km. Given a number. Example: Tropical Depression No. 1.
This requires a pressure pattern which allows stagnation of the air - and this usually means a slow-moving anticyclone such as is found in the great sub-tropical high pressure belts, ...
Doppler radar signature in the radial velocity field indicating intense, concentrated rotation - more so than a mesocyclone.
Hurricane A severe tropical cyclone having winds in excess of 64 knots (74 mi/hr).
Hydrograph An instrument that provides a continuous trace of relative humidity with time.
Synoptic scale - A large scale event that is usually measured in hundreds to thousands of kilometers and days to weeks; e.g. fronts, cyclones, and anticyclones.
The spinning motion of a tornado is most often left to right on the backside (counterclockwise). Tornadoes have been called twisters and cyclones, but these words are all synonyms for the most violent storm on earth, ...
 See also: Air, Pressure, Weather, Surface, Cloud
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