Extratropical

Extratropical
A term used in advisories and tropical summaries to indicate that a cyclone has lost its "tropical" characteristics.

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.

Extratropical Cyclone - a cyclone in the middle and high latitudes often being 2000 kilometers in diameter and usually containing a cold front that extends toward the equator for hundreds of kilometers ...

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 cyclone (low pressure system) that possesses a cold core. Any low pressure system that forms outside the tropics is extratropical.

EXTRATROPICAL- A low pressure system that did not develop in the tropics. Extratropical cyclones have a baroclinic energy regime. Extratropical can also be in reference to a tropical system that is losing tropical characteristics.

Extratropical - In meteorology, the area north of the Tropic of Cancer and the area south of the Tropic of Capricorn. In other words, the area outside the tropics.

extratropical low (sometimes called extratropical cyclone, extratropical storm)—Any cyclone that is not a tropical cyclone, usually referring to the migratory frontal cyclones of middle and high latitudes.

EXTRATROPICAL CYCLONE
Any cyclone not of tropical origin. Generally considered to be a migratory frontal cyclone found in the middle and high latitudes.
Related terms: extratropical low and extratropical storm.

Extratropical cyclones lie somewhere in between tropical cyclones and mid-latitude cyclones, drawing a portion of their energy through the evaporation and condensation of ocean water, ...

Extratropical Cyclone- A cyclone that forms outside of the tropics.
Evaporation- The change in a substance from a liquid or solid state to a gaseous state.
Eye- The roughly circular area of relatively calm weather at the center of a hurricane.

EXTRATROPICAL - Simply means not in the tropics. Usually applied to large-scale storm systems that originate in mid and upper latitude regions, such as frontal systems.

the belt of extratropical cyclones.
The trade winds from both hemispheres converge towards the doldrums and a zone of low pressure, the equatorial trough, that girdles the earth.

Bomb Cyclone - An extratropical area of low pressure in which the central pressure drops at least 24 millibars in 24 hours.

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.

GaleAn extratropical low or an area of sustained surface winds of 34 (39 mph) to 47 knots (54 mph).

Storms range in scale from tornadoes and thunderstorms to tropical cyclones to synoptic-scale extratropical cyclones.

Leeside LowExtratropical cyclones that form on the downwind (lee) side of a mountain chain. In the United States, they frequently form on the eastern side of the Rockies and Sierra Nevadas.LeewardThe side away from the wind. Compare windward.

They will cease to be issued when the tropical cyclone becomes extratropical (the storm no longer has tropical characteristics), drops below depression stage, or move inland over large land areas, such as the United States, Mexico, Canada, ...

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.

Cyclogenesis and Cyclolosis "Cyclogenesis" and "cyclolosis" are terms used by meteorologists to refer to stages of an extratropical cyclone or low pressure system.

It refers to an extratropical low or an area in which gale force winds of 34 knots (39 mph) to 47 knots (54 mph) are "expected" by a certain time period.

Specifically, the term is defined as any family of downburst clusters produced by an extratropical mesoscale convective system. Derechos may or may not be accompanied by tornadoes.

It is most often used to refer to the point of occlusion of an extratropical cyclone where the cold, warm, and occluded fronts meet. Cyclogenesis may occur at a triple point.

Mesoscale Pertaining to atmospheric phenomena having horizontal scales ranging from a few to several hundred kilometers, including thunderstorms, squall lines, fronts, precipitation bands in tropical and extratropical cyclones, ...

Storm Surge: An abnormal rise local rise in sea level accompanying an intense storm system, either tropical or extratropical caused by the storm pushing a wall of water ahead of it.

(Pronounced day-RAY-cho), a widespread and usually fast-moving windstorm associated with convection. Derechos include any family of downburst clusters produced by an extratropical MCS, ...

"Extratropical Mesoscale Convective Systems" (MCS) which produce strong dounbursts in clusters creating straight line wind damage of
hundreds of miles. Mostly occur in the spring and summer, however, may occur anytime.

QUASI-GEOSTROPHIC APPROXIMATION: An approximation to the complete equations describing atmospheric motion in which only the terms most important for the growth and decay of synoptic scale extratropical weather systems (i.e.

front moving south or southwest along the Atlantic seaboard and Great Lakes; these are especially common during the spring months.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: CD, CDFNT, CFP, Extratropical ...

It is normally called low-pressure center. It is also synonymous with depression. It can be tropical or extratropical, depending on where it occurs. More intense precipitation and winds are associated with it.

This generally occurs when there are significant storms, such as tropical and extratropical cyclones.

See also: Surface, Temperature, Water, Weather, Storm