Tropical cyclone
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Tropical cyclones, which are called hurricanes in the Northern Hemisphere, are intense low pressure systems which form over warm ocean waters at low latitudes.
tropical cyclone"The general term for a cyclone that originates over the tropical oceans. This term encompasses tropical depressions, tropical storms, hurricanes, and typhoons.
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.
Tropical Cyclone
A tropical depression of sufficient intensity to produce sustained gale force winds (sustained winds of 63 km/h or greater with gusts in excess of 90 km/h).
Tropical Cyclone
A warm-core, nonfrontal low pressure system of synoptic scale that develops over tropical or subtropical waters and has a definite organized surface circulation.
Tropical Cyclone - the general term for a large low pressure system that originates over the tropical oceans; includes tropical depressions, tropical storms, and hurricanes ...
TROPICAL CYCLONE A warm core low pressure system which develops over tropical, and sometimes subtropical, waters, and has an organized circulation.
Tropical Cyclone
A warm-core non-frontal synoptic-scale cyclone, originating over tropical or subtropical waters, with organized deep convection and a closed surface wind circulation about a well-defined center.
Tropical cyclone: Storms driven by atmosphere-ocean interactions and originating in the over tropical oceans.
Tropopause: The boundary between the troposphere and the stratosphere.
Tropical Cyclone Report A report summarizing the life history and effects of an Atlantic or eastern Pacific tropical cyclone.
Tropical Cyclone Position Estimate (TCE): The National Hurricane Center issues a position estimate between scheduled advisories whenever the storm center is within 200 nautical miles of U.S.
tropical cyclone—A general term for a cyclone that originates over tropical oceans. By international agreement, tropical cyclones have been classified according to their intensity, as follows: ...
Subtropical Cyclone
A low pressure system that develops over subtropical waters that initially has a non-tropical circulation, but in which some elements of tropical cyclone cloud structure are present.
sub-tropical cyclone - A cyclone in tropical or subtropical latitudes (from the equator to about 50°N) that has characteristics of both tropical cyclones and midlatitude (or extratropical) cyclones.
EXTRATROPICAL CYCLONE Any cyclone that is no longer tropical in origin. Generally considered to be a migratory frontal cyclone found in the middle and high latitudes.
Extratropical cyclone- A storm that forms outside the tropics, sometimes as a tropical storm or hurricane changes. See table below for differences between extratropical and tropical cyclones.
Tropical Cyclone- A low-pressure system that forms in the tropics.
Tropical Depression- A tropical cyclone with winds that do not exceed 38 miles per hour.
Tropical Storm- A tropical cyclone with winds of 39-73 miles per hour.
TROPICAL CYCLONE - A large rotating convective vortex formed when warm moist air rises in maritime tropical regions during the summer and fall months when the water stores the suns heat energy from the previous months.
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.
In extra-tropical cyclones, surface winds are deflected by friction towards the center of the low pressure system (red "L" below).
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.
Hurricane- a tropical cyclone with sustained winds over seventy-four mph.
TROPICAL STORM: A tropical cyclone in which the 1-minute sustained surface wind ranges 39-73 mph.
TROUGH: An elongated area of low atmospheric pressure.
VIRGA: Falling precipitation that evaporates before reaching the ground.
Willy-willy A tropical cyclone (with winds 33 knots or greater) in Australia, especially in the southwest. (Glossary of Weather and Climate) More recent common usage is for dust-devils.
>> Hurricanes, or tropical cyclones, form in an environment of little or no vertical wind shear.
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.
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.
This center maintains a continuous watch on tropical cyclones over the Atlantic, Caribbean, Gulf of Mexico, and the Eastern Pacific from 15 May through November 30.
TROPICAL CYCLONE The term used for cyclones that originate over tropical waters. It is a warm core low pressure system which is non-frontal and has organized circulation.
MCSs may be round or linear in shape, and include systems such as tropical cyclones, squall lines, and Mesoscale Convective Complexes (MCCs) (among others).
Hurricane beacon An air-launched balloon designed to be released in the eye of a tropical cyclone, float within the eye at predetermined levels, and transmit radio signals for RDF positioning.
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.
In the western South Pacific and the Indian Ocean severe tropical cyclones (wind speeds of 74 mph or greater) are simply called cyclones. Australian, Indian, and east African weather services will use this term to describe such storms.
Hurricane - (also known as (Typhoon, Tropical Cyclones, Willy- Willies) Tropical storms with wind speeds of 64 knots (117km/h) up to 240 knots (414 km/h) that can be thousands of square kilometers in size.
Official information issued by tropical cyclone warning centers describing all tropical cyclone watches and warnings in effect along with details concerning tropical cyclone locations, intensity and movement, and precautions that should be taken.
Hurricane: Terminology used for the Tropical Cyclones, with associated wind force above 64 knots, which occur in the North Atlantic Ocean, Caribbean Sea, Mexican Golf and in the East Pacific Ocean, North of the equator, in the west coast of Mexico.
Sometimes used as a general term for tropical revolving storms of all oceans, or in the form "tropical cyclone".
Tropical cyclones in the Bay of Bengal are particularly devastating, because of the low coastal plains and the dense population. Australia is assailed by hurricanes from the Indian Ocean, the Coral Sea and the Pacific.
Tropical Depression: A tropical cyclone in which the maximum 1-minute sustained surface wind is 61 kilometres per hour (38 mph) or less. They form from a tropical wave or tropical disturbance.
Tropical storm A tropical cyclone having wind speeds of 63 to 118 km (39 to 73 mi) per hour; a storm at pre-hurricane stage.
Tropopause Zone of transition between the troposphere below and the stratosphere above; the top of the troposphere.
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.
Wave cyclone An extratropical cyclone that forms and moves along a front. The circulation of winds about the cy clone tends to produce a wavelike deformation on the front.
"Wall cloud" is also used occasionally in tropical meteorology to describe the inner cloud wall surrounding the eye of a tropical cyclone, but the proper term for this feature is eyewall.
A wall cloud attached to a supercell thunderstorm.
Also called a low pressure system and the term used for a tropical cyclone in the Indian Ocean. Other phenomena with cyclonic flow may be referred to by this term, such as dust devils, tornadoes, and tropical and extratropical systems.
This term also is used in tropical meteorology to describe spiral-shaped bands of convection surrounding, and moving toward, the center of a tropical cyclone.
Willy-Willy Australian term for tropical cyclone, hurricane.
Wind Chill The wind can reduce significantly the amount of heat your body retains.
Tropical cyclones with sustained winds above 73 miles per hour are known as hurricanes in the North Atlantic Ocean, Caribbean Sea, Gulf of Mexico and the Eastern North Pacific (east of the date line) and cyclones in the Indian Ocean.
Hurricane Force Warning - A warning for sustained winds, or frequent gusts, of 64 knots (74 mph) or greater, either predicted or occurring, and not directly associated with a tropical cyclone.
Tropical wave- A kink or bend in the normally straight flow of surface air in the tropics which forms a low pressure trough, or pressure boundary, and showers and thunderstorms. Can develop into a tropical cyclone.
Best TrackA subjectively-smoothed representation of a tropical cyclone's location and intensity over its lifetime.
 See also: Cyclone, Storm, Weather, Air, Atmosphere
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