Portal:Tropical cyclones

The Tropical Cyclones Portal

P:TC

A tropical cyclone is a storm system characterized by a large low-pressure center, a closed low-level circulation and a spiral arrangement of numerous thunderstorms that produce strong winds and heavy rainfall. Tropical cyclones feed on the heat released when moist air rises, resulting in condensation of water vapor contained in the moist air. They are fueled by a different heat mechanism than other cyclonic windstorms such as Nor'easters, European windstorms and polar lows, leading to their classification as "warm core" storm systems. Most tropical cyclones originate in the doldrums, approximately ten degrees from the Equator.

The term "tropical" refers to both the geographic origin of these systems, which form almost exclusively in tropical regions of the globe, as well as to their formation in maritime tropical air masses. The term "cyclone" refers to such storms' cyclonic nature, with anticlockwise rotation in the Northern Hemisphere and clockwise rotation in the Southern Hemisphere. Depending on its location and intensity, a tropical cyclone may be referred to by names such as "hurricane", "typhoon", "tropical storm", "cyclonic storm", "tropical depression" or simply "cyclone".

Types of cyclone: 1. A "Typhoon" is a tropical cyclone located in the North-west Pacific Ocean which has the most cyclonic activity and storms occur year-round. 2. A "Hurricane" is also a tropical cyclone located at the North Atlantic Ocean or North-east Pacific Ocean which have an average storm activity and storms typically form between May 15 and November 30. 3. A "Cyclone" is a tropical cyclone that occurs in the South Pacific and Indian Oceans.

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Beryl shortly after peak intensity over the eastern Caribbean Sea on July 2

Hurricane Beryl (/ˈbɛrɪl/, BEHR-ril) was a deadly and destructive tropical cyclone that impacted parts of the Caribbean, the Yucatán Peninsula, and the Gulf Coast of the United States in late June and early July 2024. The second named storm, first hurricane, first major hurricane, and first of two Category 5 hurricanes of the 2024 Atlantic hurricane season, the system broke many meteorological records, primarily for formation and intensity. Beryl was one of only two Atlantic hurricanes to reach Category 5 hurricane status in July, along with Emily in 2005. Beryl was the earliest-forming Category 5 hurricane on record in the Atlantic Ocean, and the strongest hurricane to develop within the Main Development Region (MDR) of the Atlantic before the month of July.

Beryl developed from a tropical wave that left the coast of Africa on June 25. After forming on June 28 in the Main Development Region, it began rapidly intensifying as it moved west through the central tropical Atlantic. On July 1, Beryl made landfall on the island of Carriacou, Grenada, as a high-end Category 4 hurricane, causing total devastation. The hurricane intensified further as it entered the Caribbean Sea, peaking as a Category 5 hurricane early the next morning with maximum sustained winds of 165 mph (270 km/h) and a minimum central pressure of 932 mbar (27.52 inHg), before slowly weakening over the next few days due to wind shear as it passed south of Jamaica and then the Cayman Islands. It briefly re-intensified into a Category 3 hurricane before weakening again as it made landfall in Tulum, Quintana Roo, as a high-end Category 1 hurricane on July 5. After weakening into a tropical storm over the Yucatán Peninsula, the system moved into the Gulf of Mexico, where it gradually reorganized into a Category 1 hurricane on July 8, just before making its final landfall near Matagorda, Texas. Beryl slowly weakened over land as it accelerated to the northeast, eventually becoming post-tropical over the state of Arkansas on July 9 and dissipating over Ontario on July 11. (Full article...)

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Hurricane Isabel approaching North Carolina's Outer Banks

The effects of Hurricane Isabel in North Carolina were widespread, with the heaviest damage in Dare County. The hurricane made landfall in the Outer Banks of North Carolina on September 18, 2003. There, storm surge flooding and strong winds damaged thousands of houses. The storm surge produced a 2,000 feet (610 m) wide inlet on Hatteras Island, isolating Hatteras by road for two months. Several locations along North Carolina Highway 12 were partially washed out or covered with debris. Hurricane Isabel produced hurricane-force wind gusts across eastern North Carolina, knocking down trees and power lines. About 700,000 residents lost power due to the storm, although most outages were restored within a few days. The hurricane killed three people in the state – two due to falling trees, and the other a utility worker attempting to restore electricity. Damage in the state totaled $450 million (2003 USD, $769 million 2025 USD).

The National Hurricane Center issued a hurricane watch, and later warning, for the state's coastline in advance of the hurricane's landfall. Local officials issued evacuation orders for 18 counties, along with various flood warnings. In the aftermath of the hurricane, then-President George W. Bush declared a state of emergency for 26 counties in the state, which allocated federal resources to the state. Utility crews from nearby states helped restore power. The United States Geological Survey dredged sand to restore the breach on Hatteras Island, with traffic restored about two months after the hurricane. (Full article...)

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Visual comparison of Hurricane Floyd and Hurricane Andrew. The two storms are at similar positions and nearly identical intensities (933 mbar), but Hurricane Floyd is remarkably larger. In 1999 at the time of Floyd, it was believed that the wind speeds of the hurricanes were nearly identical as well, at 120 knots (140 mph, 220 km/h). In 2002, however, hurricane re-analysis concluded that Andrew had stronger winds than had previously been thought, and in the picture the storm winds are actually close to 145 knots (165 mph, 270 km/h).

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The 2018–19 South-West Indian Ocean cyclone season was a record breaking and devastating season that was the most active season ever recorded in the basin. It is also the deadliest cyclone season recorded in the South-West Indian Ocean, surpassing the 1891–92 season in which the 1892 Mauritius cyclone devastated the island of Mauritius, and was the costliest South-West Indian Ocean season at the time until it was surpassed by the 2024-25 season. Most of the fatalities and damage came from Cyclone Idai. The season was an event of the annual cycle of tropical cyclone and subtropical cyclone formation in the South-West Indian Ocean basin. It officially began on 15 November 2018, and ended on 30 April 2019, except for Mauritius and the Seychelles, which it ended on 15 May 2019. These dates conventionally delimit the period of each year when most tropical and subtropical cyclones form in the basin, which is west of 90°E and south of the Equator. Tropical and subtropical cyclones in this basin are monitored by the Regional Specialised Meteorological Centre in Réunion.

The season set a new record of nine intense tropical cyclones, the largest number since the start of reliable satellite coverage in 1967, surpassing the 2006–07 season. Beginning the season early, Moderate Tropical Storm 01 formed during September 2018. Two other systems formed prior to the official start of the season during November—the first intense tropical cyclone and the first named storm, Alcide, and Severe Tropical Storm Bouchra. A pair of intense tropical cyclones—Cilida and Kenanga—persisted in December. In January 2019, Desmond caused damages in Mozambique, and shortly thereafter, Eketsang passed by Madagascar, producing heavy rain and landslides that killed 27. Onto the next month, Funani and Gelena threatened Rodrigues, with the latter disrupting its electricity and causing US$1 million in damages. (Full article...)

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Currently active tropical cyclones

Italicized basins are unofficial.

North Atlantic (2025): No active systems

East and Central Pacific (2025): No active systems

West Pacific (2025): No active systems

North Indian Ocean (2025): No active systems

Mediterranean (2024–25): No active systems

South-West Indian Ocean (2024–25): No active systems

Australian region (2024–25): No active systems

South Pacific (2024–25): No active systems

South Atlantic (2024–25): No active systems

Last updated: 12:17, 16 May 2025 (UTC)

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Tropical cyclone anniversaries

May 21

1976 - Typhoon Pamela passed over Guam with winds of 220 km/h (140 mph) and caused over $500 million of damage to the island.
2010 - Cyclone Laila (pictured) dissipates after causing destruction over the Andhra Pradesh region of India.

May 22, 1996 - Tropical Storm Cam (pictured) reached its peak intensity with 110 km/h (70 mph) while moving to the east through the Luzon Strait between the Philippines and Taiwan.

May 23

1976 - Subtropical Storm One struck the Florida panhandle, bringing heavy rainfall to the southeastern United States but only minimal damage.
2003 - Typhoon Chan-hom (pictured) reaches its maximum intensity as a Category 4 typhoon with a pressure of 940 mbar (27.76 inHg).

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Did you know…

…that the Joint Typhoon Warning Center considers that Typhoon Vera (pictured) of 1986 is actually two distinct systems, formed from two separated low-level circulations?
…that Cyclone Freddy (track pictured) in 2023 was the longest-lasting tropical cyclone recorded?
…that the typhoons of 2024—Yinxing, Toraji, Usagi, and Man-yi (pictured)—made history as the first recorded instance since 1951 of four tropical cyclones coexisting in November?
…that Hurricane Otis (pictured) in 2023 was the first Pacific hurricane to make landfall at Category 5 intensity and surpassed Hurricane Patricia as the strongest landfalling Pacific hurricane on record?

Did you know archive

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The following are images from various tropical cyclone-related articles on Wikipedia.

Image 1A polar low over the Sea of Japan in December 2009 (from Cyclone)
Image 2Radar image of Hurricane Erika making landfall over Northeastern Mexico (from Tropical cyclone observation)
Image 3The aftermath of Hurricane Katrina in Gulfport, Mississippi. (from Tropical cyclone preparedness)
Image 4Aerial image of destroyed houses in Tacloban, following Typhoon Haiyan (from Effects of tropical cyclones)
Image 5Hurricane Florence viewed from the International Space Station (from Cyclone)
Image 6Several cyclones on the dynamic north pole of Jupiter, imaged by Juno (from Cyclone)
Image 7Broken concrete utility pole in Puerto Rico after Hurricane Maria in 2017, which ranks fourth in costliest US tropical cyclones. (from Effects of tropical cyclones)
Image 8The initial extratropical low-pressure area forms at the location of the red dot on the image. It is usually perpendicular (at a right angle to) the leaf-like cloud formation seen on satellite during the early stage of cyclogenesis. The location of the axis of the upper level jet stream is in light blue. (from Cyclone)
Image 9Surface weather map of the 1935 Labor Day hurricane moving up the west coast of Florida (from Tropical cyclone observation)
Image 10All but the most expensive bottles of water were sold out at this Publix supermarket before Hurricane Irma; in the week preceding the storm, water sold out soon after shipments arrived (from Tropical cyclone preparedness)
Image 11The number of $1 billion Atlantic hurricanes almost doubled from the 1980s to the 2010s, and inflation-adjusted costs have increased more than elevenfold. The increases have been attributed to climate change and to greater numbers of people moving to coastal areas. (from Effects of tropical cyclones)
Image 12The dangerous semicircle is the upper-right corner, with the arrow marking the direction of motion of a Northern Hemisphere storm. Note that typhoons, etc. are asymmetrical, and semicircle is a convenient misnomer. (from Effects of tropical cyclones)
Image 13Personnel and equipment from the National Guard of the United States en route to Hurricane Florence response efforts in 2018
Image 14Flooding in Port Arthur, Texas caused by Hurricane Harvey. Harvey was the wettest and second-costliest tropical cyclone in United States history. (from Effects of tropical cyclones)
Image 15Chart with concurrent information for Hurricane Arlene and Tropical Storm Bret logged and plotted (from Tropical cyclone preparedness)
Image 16An extratropical cyclone near Iceland (from Cyclone)
Image 17Hurricane response involves working in hazardous conditions, including contamination and electrocution hazards from floodwater.
Image 18Hurricane Isabel (2003)'s effect on the North Carolina Outer Banks (from Effects of tropical cyclones)
Image 19Percentages of hurricane deaths in the United States from 1970 to 1999. (from Effects of tropical cyclones)
Image 20The aftermath of Hurricane Katrina in Gulfport, Mississippi. Katrina was the costliest tropical cyclone in United States history. (from Effects of tropical cyclones)
Image 21Comparison between extratropical and tropical cyclones on surface analysis (from Cyclone)
Image 22An example of a chart for Matthew showing its five-day forecast track (from Tropical cyclone preparedness)
Image 23Subtropical Storm Alex in the north Atlantic Ocean in January 2016 (from Cyclone)
Image 24Cyclone on Mars, imaged by the Hubble Space Telescope (from Cyclone)
Image 25A fictitious synoptic chart of an extratropical cyclone affecting the UK and Ireland. The blue arrows between isobars indicate the direction of the wind, while the "L" symbol denotes the centre of the "low". Note the occluded, cold and warm frontal boundaries. (from Cyclone)
Image 26Tropical cyclones form when the energy released by the condensation of moisture in rising air causes a positive feedback loop over warm ocean waters. (from Cyclone)

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This is a featured list, which represents some of the best list articles on English Wikipedia.

Within the Pacific Ocean, the name of any significant tropical cyclone can be retired from the tropical cyclone naming lists by the World Meteorological Organization if it concludes that a storm was so deadly or damaging that any future use of that name would be inappropriate. Storm names can also be retired for other reasons, such as being deemed politically insensitive. Within the Eastern Pacific and Central Pacific basins (between 140°W and the western coast of North America and between the International Date Line (180°) and 140°W, respectively, and north of the Equator), a total of 22 names have been retired from the official lists. The deadliest system to have its name retired was Hurricane Pauline, which caused over 230 fatalities when it struck Mexico during October 1997, while the costliest hurricane was Hurricane Otis which caused an economic impact of over $12 billion in October 2023. Hurricane John was the most recent Pacific tropical cyclone to have its name retired. (Full article...)

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Related WikiProjects

WikiProject Tropical cyclones is the central point of coordination for Wikipedia's coverage of tropical cyclones. Feel free to help!

WikiProject Weather is the main center point of coordination for Wikipedia's coverage of meteorology in general, and the parent project of WikiProject Tropical cyclones. Three other branches of WikiProject Weather in particular share significant overlaps with WikiProject Tropical cyclones:

The Non-tropical storms task force coordinates most of Wikipedia's coverage on extratropical cyclones, which tropical cyclones often transition into near the end of their lifespan.
The Floods task force takes on the scope of flooding events all over the world, with rainfall from tropical cyclones a significant factor in many of them.
WikiProject Severe weather documents the effects of extreme weather such as tornadoes, which landfalling tropical cyclones can produce.

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