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Encyclopedia > South Atlantic tropical cyclone

A South Atlantic tropical cyclone is an unusual weather event which occurs in the southern Atlantic Ocean, south of the equator. Strong wind shear (which disrupts cyclone formation) and a lack of weather disturbances favorable for cyclone development make any hurricane-strength cyclones extremely rare. Cyclone Catarina, a rare South Atlantic tropical cyclone viewed from the International Space Station on March 26, 2004. ... The equator is an imaginary circle drawn around a planet (or other astronomical object) at a distance halfway between the poles. ... Wind shear is a difference in wind speed and/or direction between two points in the atmosphere. ... This article is about weather phenomena. ...

If a "hurricane season" were to be demarcated in the South Atlantic, it would most likely be the opposite of the North Atlantic season, from December to May with mid-March being the peak when the oceans are warmest in the Southern Hemisphere.

Below is a list of known South Atlantic tropical cyclones.


Cyclone Catarina

The crew of the International Space Station photographed the cyclone making landfall on the southern Brazilian state of Santa Catarina.
The crew of the International Space Station photographed the cyclone making landfall on the southern Brazilian state of Santa Catarina.
Main article: Cyclone Catarina

Cyclone (or Hurricane) Catarina was an extraordinarily rare tropical cyclone, forming in the southern Atlantic Ocean in March 2004. Just after becoming a hurricane, it hit the southern coast of Brazil on the evening of March 28, with winds estimated near 135 km/h (85 mph), making it a Category 1 storm on the Saffir-Simpson Hurricane Scale. Image File history File links Download high resolution version (1000x662, 320 KB) http://eol. ... Image File history File links Download high resolution version (1000x662, 320 KB) http://eol. ... ISS Statistics Crew: 2 As of August 21, 2005 Perigee: 352. ... Santa Catarina is a state in southern Brazil with one of the highest standards of living in the country. ... Hurricane Catarina redirects here, but should not be confused with Hurricane Katrina Cyclone Catarina was an extremely rare South Atlantic tropical cyclone. ... 2004 : January - February - March - April - May - June - July - August - September - October - November - December Deaths • 08 Abu Abbas • 20 Queen Juliana • 28 Peter Ustinov • 30 Alistair Cooke More March 2004 deaths Ongoing events EU Enlargement Exploration of Mars: Rovers Haiti Rebellion Israeli-Palestinian conflict Occupation of Iraq Same-sex marriage in... March 28 is the 87th day of the year in the Gregorian Calendar (88th in Leap years). ... Kilometre per hour (American spelling: kilometer per hour) is a unit of both speed (scalar) and velocity (vector). ... The Saffir-Simpson Hurricane Scale is a scale classifying most Western Hemisphere tropical cyclones that exceed the levels of tropical depression and tropical storm and thereby become hurricanes. ...

This event is considered by meteorologists to be a once-in-a-lifetime occurrence (though some believe climate change may make them more common). Satellite image of Hurricane Hugo with a polar low visible at the top of the image. ... Variations in CO2, temperature and dust from the Vostok ice core over the last 400 000 years Climate change refers to the variation in the Earths global climate or regional climates over time. ...

Tropical Storm off AngolaApril 10, 1991
Tropical Storm off Angola
April 10, 1991

Image File history File links AngolaTropicalStorm1991. ... Image File history File links AngolaTropicalStorm1991. ... April 10 is the 100th day of the year in the Gregorian calendar (101st in leap years). ... 1991 (MCMXCI) is a common year starting on Tuesday of the Gregorian calendar. ...

Other known South Atlantic Tropical Cyclones

Angola Tropical Cyclone of 1991

On April 10, 1991, what may have been a tropical depression or tropical storm formed in the eastern South Atlantic, recorded by weather satellites off the coast of Angola. It reached a peak on the 13th, and dissipated 2 days later, drifting west-southwestward from its beginning. Of the few South Atlantic tropical cyclones that existed, this was the only one in the eastern Atlantic. This was also the first South Atlantic tropical cyclone ever observed. April 10 is the 100th day of the year in the Gregorian calendar (101st in leap years). ... 1991 (MCMXCI) is a common year starting on Tuesday of the Gregorian calendar. ...

Tropical Cyclone of January 2004

A small area of convection developed on a trough of low pressure in mid January off Brazil. It organized and appeared to become a tropical depression on January 18th. The next morning, it had a small CDO and well-defined bands, and the system, either a weak tropical storm or a strong tropical depression, likely reached its peak. Located 150 nm southeast of Salvador, Brazil, it weakened as upper level shear, typical for the basin, prevailed. The depression moved inland on the 20th as a circulation devoid of convection, and dissipated the next day over Brazil, where it caused heavy rains and flooding. This would mark the first time in recorded history that two tropical cyclones (Catarina and the January storm) have been seen during the same year in the South Atlantic, and may be considered to make up the 2003-04 South Atlantic hurricane season. January 18 is the 18th day of the year in the Gregorian calendar. ... CDO may refer to: Cagayan de Oro, a city in the Philippines Corporate Development Outsourcing, a construction management company in Chicago. ... Salvador and Baía de Todos os Santos from space, April 1997 Morning Street Scene, Bahia, Brazil, about 1900 Salvador (in full, São Salvador da Baía de Todos os Santos, meaning Holy Savior of the Bay of All Saints) is a city on the northeast coast of Brazil...

2004-2005 Tropical Cyclone Season

Tropical Depression of December 2004

On December 31, 2004, a weak tropical depression formed near S30.2 W47.5. QuikSCAT scatterometer data clearly showed a well-developed cyclone which had formed from a frontal low. The system later fell victim to high-level wind shear, as is common in the South Atlantic. [citation needed] December 31 is the 365th day of the year (366th in leap years) in the Gregorian Calendar. ... 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... The QuikSCAT (Quick Scatterometer) is an earth-observing satellite that provides wind speed and direction information over oceans to NOAA.It is a quick recovery mission to fill the gap created by the loss of data from the NASA Scatterometer (NSCAT) that was lost in June 1997. ... A radar scatterometer is designed to determine the normalized radar cross section (sigma-0) of the surface. ... A low pressure area, or a low for short, is a region where the atmospheric pressure is lowest with relation to the surrounding area. ...

Subtropical Storm of January 2005

A low-pressure system in the open South Atlantic Ocean developed convection and some circulation on January 30th. It appeared to have some Subtropical characteristics, but unlike Catarina 10 months earlier, it dissipated from strong upper level shear. January 30 is the 30th day of the year in the Gregorian calendar. ...

External links

  • Other unusual formation locations
  • Map of Catarina's track
  • NOAA info on South Atlantic Tropical Cyclones
  • January 2005 Subtropical Storm

See also

  Results from FactBites:
Tropical cyclone - Facts, Information, and Encyclopedia Reference article (8522 words)
In meteorology, a tropical cyclone (or tropical depression, tropical storm, typhoon, or hurricane, depending on strength and geographical context) is a type of low pressure system which generally forms in the tropics.
Tropical cyclones that cause massive destruction are fortunately rare, but when they happen, they can cause damage in the thousands of lives and the billions of dollars.
The deadliest tropical cyclone on record is a 100 mph (160 km/h, Category 2) storm that hit the densely populated Ganges Delta region of East Pakistan (now Bangladesh) on November 13, 1970.
cyclone: Definition and Much More from Answers.com (2318 words)
Cyclones circulate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
Cyclones in middle latitudes move generally from west to east along with the prevailing winds and cover 500 to 1,000 mi (800–1,610 km) each day; tropical cyclones usually move toward the west with the flow of the trade winds during their formative stages, then curve toward the poles around subtropical anticyclones.
Near the center of the cyclone the pressure gradient force (from the pressure in the center of the cyclone compared to the pressure outside the cyclone) and the Coriolis force must be in an approximate balance, or else the cyclone would collapse in on itself as a result of the difference in pressure.
  More results at FactBites »



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