Portal:Tropical cyclones
The Tropical Cyclones Portal
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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Hurricane Alex was the first Atlantic hurricane to occur in January since Hurricane Alice of 1954–55. Alex originated as a non-tropical low near the Bahamas on January 7, 2016. Initially traveling northeast, the system passed by Bermuda on January 8 before turning southeast and deepening. It briefly acquired hurricane-force winds by January 10, then weakened slightly before curving towards the east and later northeast. Acquiring more tropical weather characteristics over time, the system transitioned into a subtropical cyclone well south of the Azores on January 12, becoming the first North Atlantic tropical or subtropical cyclone in January since Tropical Storm Zeta of 2005–2006. Alex continued to develop tropical features while turning north-northeast, and transitioned into a fully tropical cyclone on January 14. The cyclone peaked in strength as a Category 1 hurricane on the Saffir–Simpson scale (SSHWS), with maximum sustained winds of 85 mph (140 km/h) and a central pressure of 981 mbar (hPa; 28.97 inHg). Alex weakened to a high-end tropical storm before making landfall on Terceira Island on January 15. By that time, the storm was losing its tropical characteristics; it fully transitioned back into a non-tropical cyclone several hours after moving away from the Azores. Alex ultimately merged with another cyclone over the Labrador Sea on January 17.
The precursor cyclone to Hurricane Alex brought stormy conditions to Bermuda from January 7 to 9. On its approach, the hurricane prompted hurricane and tropical storm warnings and the closure of schools and businesses for the Azores. Alex brought gusty winds and heavy rain to the archipelago, though structural damage was generally minor. One person died of a heart attack because the inclement weather prevented them from being transported to hospital in time. (Full article...)Selected article -
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The 1994 Pacific hurricane season was the final season of the eastern north Pacific's consecutive active hurricane seasons that started in 1982. The season officially started on May 15, 1994, in the eastern Pacific, and on June 1, 1994, in the central Pacific, and lasted until November 30, 1994. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeastern Pacific Ocean. The first tropical cyclone formed on June 18, while the last system dissipated on October 26. This season, twenty-two tropical cyclones formed in the north Pacific Ocean east of the dateline, with all but two becoming tropical storms or hurricanes. A total of 10 hurricanes occurred, including five major hurricanes. The above average activity in 1994 was attributed to the formation of the 1994–95 El Niño.
Of note in this season is an unusual spree of very intense storms; the season was the first on record to see three Category 5 hurricanes, later tied in 2002 and 2018. Hurricanes Emilia, Gilma, John, and Olivia all reached a pressure below 930 millibars. Hurricane John was the farthest-traveling tropical cyclone on record at 13,180 km (8,190 mi). Elsewhere, Hurricane Rosa caused four casualties in Mexico as the basin's only landfalling tropical storm or hurricane, and later was responsible for flooding in Texas. (Full article...)Related portals
Currently active tropical cyclones
Italicized basins are unofficial.
- North Atlantic (2024)
- No active systems
- East and Central Pacific (2024)
- No active systems
- West Pacific (2024)
- No active systems
- North Indian Ocean (2024)
- No active systems
- Mediterranean (2023–24)
- No active systems
- South-West Indian Ocean (2023–24)
- No active systems
- Australian region (2023–24)
- No active systems
- South Pacific (2023–24)
- No active systems
- South Atlantic (2023–24)
- No active systems
Last updated: 21:50, 2 June 2024 (UTC)
Tropical cyclone anniversaries
June 3,
- 1982 - Tropical Storm 02B made landfall in India near Paradip, killing 140 people and destroying half a million homes.
- 2010 - Cyclone Phet struck eastern Oman, dropping heavy rainfall across normally arid areas; the storm killed 47 people and left US$861 million in damage.
- 2014 - Tropical Storm Boris makes landfall over in Southwestern Mexico as a weak system, killing a total of six people and US$46.8 million worth of damages.
June 4
- 2006 - Cyclone Gonu (pictured) became the strongest tropical cyclone on record in the Arabian Sea, with 3-minute winds of 155 km/h (100 mph); two days later, Gonu struck the Arabian Peninsula, killing 49 people and causing about $4 billion of damage.
- 2012 - Typhoon Mawar reaches peak intensity as a Category 3 typhoon.
- 2014 - Tropical Storm Boris makes landfall over Southwestern Mexico and kills 6 people with US$46.8 million in damages.
June 5
- 1890 - A cyclone struck northeastern Oman, killing 727 people from its floods.
- 2001 - Tropical Storm Allison (pictured) formed over the northern Gulf of Mexico and made landfall in Southeast Texas. Allison caused record levels of rainfall along much of its path, with the resulting flooding killing 41 people and causing US$5.5 billion of damage, making Allison the costliest tropical storm on record.
- 2003 - Cyclone Epi developed east of Papua New Guinea.
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 Hurricane Agatha (pictured) was the strongest Pacific hurricane to make landfall in Mexico in May since records began in 1949?
- …that Cyclone Raquel (track pictured) travelled between the Australian and South Pacific basins between the 2014–15 and 2015–16 seasons, spanning both seasons in both basins?
- …that Cyclone Amphan (pictured) in 2020 was the first storm to be classified as a Super Cyclonic Storm in the Bay of Bengal since 1999?
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The British Overseas Territory of Bermuda has a long history of encounters with Atlantic tropical cyclones, many of which inflicted significant damage and influenced the territory's development. A small archipelago comprising about 138 islands and islets, Bermuda occupies 21 square miles (54 km2) in the North Atlantic Ocean, roughly 650 miles (1,050 km) east of Cape Hatteras, North Carolina. The islands are situated far outside the Main Development Region for Atlantic hurricanes, but within the typical belt of recurving tropical cyclones. Most storms form in the central Atlantic or western Caribbean Sea before approaching Bermuda from the southwest; storms forming north of 28°N are unlikely to impact the territory.
According to the Bermuda Weather Service, Bermuda experiences a damaging tropical cyclone once every six to seven years, on average. Due to the small area of the island chain, landfalls and direct hits are rare. Strictly speaking, only 11 landfalls have occurred during years included in the official Atlantic hurricane database, starting in 1851.[1] When hurricanes Fay and Gonzalo struck Bermuda just days apart in October 2014, that season became the first to produce two landfalls. Two damaging storms impacted Bermuda in September 1899, but the center of the first narrowly missed the islands. Tropical cyclones, and their antecedent or remnant weather systems, have affected the territory in all seasons, most frequently in the late summer months. A study of recorded storms from 1609 to 1996 found that direct hits from hurricanes were most common in early September and late October, with an intervening relative lull creating two distinct 'seasons'. (Full article...)Topics
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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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- ^ "Atlantic hurricane best track (HURDAT version 2)" (Database). United States National Hurricane Center. April 5, 2023. Retrieved June 4, 2024. This article incorporates text from this source, which is in the public domain.