The most active month was December 2018, with a total of seven tropical lows existing in the region at some … [16] Before any significant intensification could occur, however, the tropical low exited the Australian region on 30 November, passing into the area of responsibility of Météo-France's tropical cyclone warning centre in Réunion. [49] Owing to the increase in organisation, the Bureau of Meteorology (BOM) classified the system as a tropical low by 21:00 UTC,[50] when it was located approximately 330 km (205 mi) northwest of Broome. However, as three of the offices are run by the Australian national weather service, only 3 lists of names are operated. [18] At its peak intensity in the Australian region, the BOM estimated the system's minimum atmospheric pressure as 1005 hPa (29.68 inHg) on 25 November. Tropical Cyclone Harry Harry formed on 15 December near the Sunda Strait, and moved west-southwest through its existence. The next 12 names on the naming list are listed below: The tropical cyclone warning centre in Jakarta monitors tropical cyclones from the Equator to 11°S, between the longitudes 90°E and 145°E. [4], The Western region encompasses the area east of 90°E and west of 125°E. 278,219 Pages. [96] These warning centres monitor all tropical cyclones that form within the Australian region, including any within the areas of responsibility of TCWC Jakarta or TCWC Port Moresby. This season was also the first time that the BoM implemented a "tropical cyclone year." By late on 7 December, infrared satellite imagery indicated an improvement in the structure of the low, with the system displaying an increase in flaring deep convection, accompanied by rotation evident in the lower troposphere. The 2020–21 Australian region cyclone season is the period of the year when tropical cyclones form in the Southern Indian Ocean and Pacific Oceans between 90°E and 160°E. The region averages seven tropical cyclones in a season, and the bureau assesses the region to have a low level of accuracy when forecasting tropical cyclone activity. With an average of 10 cyclones per year developing amongst areas such as Exmouth and Broome in the west, and far north Queensland in the east, cyclone season can be pretty daunting. It officially started on 1 November 1988, and officially ended on 30 April 1989. [5] The region also covers waters off Papua New Guinea and western parts of the Solomon Islands. Each tropical cyclone year within this basin starts on 1 July and runs throughout the year, encompassing the tropical cyclone season which runs from 1 November and lasts until 30 April each season. Number of tropical lows and tropical cyclones excludes Tropical Cyclone Raquel, which was considered to have been a part of the 2014-15 year. Ahead of the cyclone season, the Australian Bureau of Meteorology (BoM), the New Zealand National Institute of Water and Atmospheric Research (NIWA)and various other Pacific Meteorological services, all contributed towards the Island Climate Update tropical cyclone outlook that was released during October 2019. During the season, tropical cyclones will be officially monitored by one of the three tropical cyclone warning centres (TCWCs) for the region which are operated by the Australian Bureau of Meteorology, National Weather Service of Papua New Guinea and the Indonesian Agency for Meteorology, Climatology and Geophysics. [8][9] The system was assigned the identifier code 01U by the BOM. On August 13 the storm was expected to re-intensify, but this never happened and the storm dissipated in the early hours of August 14. By this time, however, the system was quickly approaching the Australian coast, so the time available for further intensification was very limited. [57] Sustained winds also reached 56 km/h (35 mph) at Bedout Island on 8 December, with a peak gust of 67 km/h (42 mph),[58] and Rowley Shoals recorded maximum sustained winds of 52 km/h (32 mph) and gusts to 65 km/h (40 mph). [4] The region covers the Timor Sea, the Banda Sea, the Arafura Sea and the Gulf of Carpentaria. [82][83][84] Around this time, the BOM estimated the tropical low's central atmospheric pressure to be 995 hPa (29.38 inHg). The United States Joint Typhoon Warning Center (JTWC) and other national meteorological services including Météo-France will also monitor the basin during the season. We can't grant all these requests as they far out-number the number of tropical cyclones that occur in the Australian region. Read the detailed post cyclone reports for Australian cyclones dating back to 1970. Individual cyclone reports These reports have mainly been compiled using original material produced soon after the cyclone … Contents[show] Storms Tropical Cyclone Billy A tropical low formed off Australia on August 11. The region averages four tropical cyclones in a season, and the bureau assesses the region to have a low level of accuracy when forecasting tropical cyclone activity. The 1998–99 Australian region cyclone season was an above average tropical cyclone season that featured Gwenda, the most intense tropical cyclone in the Australian Region (later tied with Inigo in 2003) . [4], The Eastern region encompasses the area east of 142.5°E and west of 160°E. [92] Troughton Island also experienced a gust of 95 km/h (59 mph) during a thunderstorm on 21 December. [73], As the sprawling tropical low tracked inland, flood watches and warnings were issued for large swathes of the deserts of western central Australia, incorporating parts of Western Australia, the Northern Territory and South Australia. [49] Due to the system's proximity to the coast, however, both the BOM and the Joint Typhoon Warning Center (JTWC) forecast only a low chance of development into a tropical cyclone before making landfall. Below average sea surface temperatures in the eastern tropical Pacific Ocean and atmospheric conditions indicated a La Niña pattern, and it was declared that a La Niña had emerged on 29 September 2020. ; Please keep off-topic and political discussion to a minimum, and respect the guidelines listed to the right. 1973–74 Australian region cyclone season; Season summary map. The season officially began on 1 November 2020 and will end on 30 April 2021, however, a tropical cyclone could form at any time between 1 July 2020 and 30 June 2021 and would count towards the season total. [4] The sub-region covers waters off Western Australia north of Shark Bay, and extends westward to Christmas Island. [32], Tropical Low 02U soon assumed a southeastward course, steered by the influence of a subtropical ridge situated to the east. Indonesian Agency for Meteorology, Climatology and Geophysics, National Oceanic and Atmospheric Administration, List of Australian region cyclones before 1900, List of Tropical Cyclone Names withdrawn from use due to a Cyclone's Negative Impact on one or more countries, "Australian Tropical Cyclone Outlook for 2020 to 2021", "Upgrades to the Norfolk Island Tropical Cyclone Warning Service", "Monthly Global Tropical Cyclone Summaries", "Record-breaking La Niña events – Tropical cyclone activity during 2010–11 and 2011–12", List of atmospheric pressure records in Europe, https://en.wikipedia.org/w/index.php?title=Australian_region_tropical_cyclone&oldid=996027599, Articles with unsourced statements from December 2020, Articles with Indonesian-language sources (id), Creative Commons Attribution-ShareAlike License, This page was last edited on 24 December 2020, at 03:28. List of Australian region cyclones before 1940. [52] As the system strengthened in the moderately favourable environment, the BOM estimated the minimum atmospheric pressure at the centre of the low to be 997 hPa (29.44 inHg) at 18:00 UTC on 8 December. The system was last mentioned as a tropical low by the BOM on 11 December while located in central Western Australia. Australian cyclone season in 2018 and 2019. [52] The tropical low made landfall on the Kimberley coast between Bidyadanga and the Anna Plains cattle station just after 00:00 UTC on 9 December. [47][49], As the tropical low tracked southeastwards towards the coast, environmental conditions continued to improve, with sea surface tempertaures nearing 31 °C (88 °F) and the system maintaining a robust poleward outflow channel in the upper troposphere. [42] Despite these wind readings, the BOM did not classify the low as a Category 1 tropical cyclone because they determined that gale-force winds did not extend more than halfway around the centre. It formed from the monsoon trough on 12 February in the Coral Sea. [4], The Northwestern sub-region encompasses the area east of 105°E, west of 130°E and north of 25°S. Tropical cyclones are non-frontal, low pressure systems that develop, within an … [35][36] This enabled the system to strengthen as it rapidly approached the coast of Western Australia at a speed of approximately 40 km/h (25 mph), although vertical wind shear once again began to increase. [39] About three hours prior to landfall, the JTWC reported that maximum one-minute sustained winds had increased to 75 km/h (45 mph). It reached Category 2 later that day and began to weaken. Lord Howe Island lies within the region, but Norfolk Island lies east of the region, although the bureau continues to monitor tropical cyclones when they are a threat to the external territory. [1] Within the Southern Hemisphere there are officially three areas where tropical cyclones develop on a regular basis, these areas are the South-West Indian Ocean between Africa and 90°E, the Australian region between 90°E and 160°E and the South Pacific basin between 160°E and 120°W. [40][41] Ten-minute sustained winds also reached 63 km/h (39 mph) on Legendre Island at 00:00 UTC. [47][48] Initially lacking organised deep convection, the system proceeded to track in a generally southwards direction towards the Kimberley region of Western Australia. In Western Australia in particular, the lack of population centers, shipping lanes, radars, and offshore stations meant that storms were tracked infrequently. [17] The system later intensified into Severe Tropical Storm Bongoyo in the South-West Indian Ocean cyclone region on 7 December. The sub-region averages five tropical cyclones in a season, and the bureau assesses the sub-region to have a moderate level of accuracy when forecasting tropical cyclone activity. April 2014.Der operative Plan der World Meteorological Organization sieht für die Gewässer auf der Südhalbkugel zusätzlich ein „tropisches Zyklonjahr“ vor. [34] The tropical low continued rapidly inland across Western Australia over the next day, accelerating to about 50 km/h (30 mph) soon after landfall. [94] Upon entering the region, the system was classified as a tropical low by the Bureau of Meteorology (BOM), and had an estimated central atmospheric pressure of 1006 hPa (29.71 inHg). This category has the following 14 subcategories, out of 14 total. [6][7] The presence of the MJO brought an increase in tropical moisture to the atmospheric environment, as well as aiding the formation of Tropical Cyclone Alicia in the South-West Indian Ocean region in mid November. [10] The Joint Typhoon Warning Center (JTWC) assessed environmental conditions as being only marginally conducive for tropical cyclogenesis, with good poleward outflow and sea surface temperatures near 30 °C (86 °F) being offset by the effects of moderate vertical wind shear. [28] After tracking in a clockwise path around the northeastern side of Christmas Island, Tropical Low 02U became quasi-stationary on 8 December. The region averages three tropical cyclones in a season, and the bureau assesses the region to have a very low level of accuracy when forecasting tropical cyclone activity. Tropical cyclone activity in the Australian region has large variability from year to year, due to the influence of naturally occurring climate drivers, such as ENSO. [45] The weakening tropical low was last mentioned by the BOM at around 08:00 UTC on 12 December, while located in the southeastern corner of Western Australia. [37][38], Tropical Low 02U made landfall between Port Hedland and Whim Creek on the Pilbara coastline just after 03:00 UTC on 11 December. [89][90], Tropical Low 03U generated strong winds in the Kimberley region and on nearby islands for several days while located nearby. The basin sees an average of about seven cyclones each year, although more can form or come in from other basins, such as the South Pacific. [28][29] On 7 December, warm sea surface temperatures and strong diffluence in the upper troposhphere fuelled the development of deep convection around the system's low-level circulation centre. Category:Australian region cyclones | Military Wiki | Fandom. [98] As names are assigned in a random order, the whole list is shown below: 2020–21 South-West Indian Ocean cyclone season, Australian region tropical cyclone seasons, Indonesian Agency for Meteorology, Climatology and Geophysics, List of Southern Hemisphere cyclone seasons, "Australian Tropical Cyclone Outlook for 2020 to 2021", "South Pacific Tropical Cyclone Outlook for 2020 to 2021", "Tropical Cyclone Seasonal Outlook for the Northern Territory", "Tropical Cyclone Outlook for northwest Australia", Southwest Pacific Tropical Cyclone Outlook – October 2020, "Tropical Cyclone Outlook for the Western Region", "South East Asia MSLP Analysis Chart (00Z)", "Significant Tropical Weather Advisory for the Indian Ocean (0330Z)", "Significant Tropical Weather Advisory for the Indian Ocean (02Z)", "Tropical Cyclone Activity Bulletin for the South-West Indian Ocean (12Z)", "Significant Tropical Weather Advisory for the Indian Ocean (18Z)", "Tropical Cyclone Outlook for the Indian Ocean", "Tropical Cyclone Bongoyo Analysis Bulletin #5 (06Z)", "South East Asia Gradient Level Wind Analysis (00Z)", "Cocos Islands Airport Weather Observations", "Cocos Islands Airport Daily Rainfall Observations", "MSLP Analysis Chart for the Australian Region (06Z)", "Tropical Cyclone Formation Alert (Invest 96S) (0530Z)", "Tropical Cyclone 03S Forecast Track Map #2 (00Z)", "Severe Weather Warning for the Kimberley, Pilbara, North Interior and South Interior districts (0256Z)", "Severe Weather Warning for the Kimberley, Pilbara, North Interior and South Interior districts (0414Z)", "Port Hedland Airport Weather Observations", "Severe Weather Warning for the Pilbara, North Interior and South Interior districts (0720Z)", "Severe Weather Warning for the North Interior and South Interior districts (1514Z)", "Southern Interior District Forecast (0825Z)", "MSLP Analysis Chart for the Australian Region (00Z)", "Severe Weather Warning for the Kimberley District (00Z)", "Tropical Cyclone Formation Alert (Invest 99S) (2130Z)", "MSLP Analysis Chart for the Australian Region (18Z)", "Severe Weather Warning for the North Interior, Kimberley and Pilbara districts (02Z)", "Flood Watch #3 for the North West Pastoral District and West Coast", "Warburton Airfield Weather Observations", "Lombadina Airstrip Weather Observations", "Giles Meteorological Office Weather Observations", "Flood Warning #2 for the Sandy Desert (0257Z)", "Flood Warning #2 for the West Kimberley District (0255Z)", "Initial Flood Watch for the South Western Northern Territory (0142Z)", "Initial Flood Watch for the North West Pastoral District (0242Z)", "Tropical Cyclone Outlook for the Northern Region", "Significant Tropical Weather Advsiory for the Indian Ocean (18Z)", "Tropical Cyclone Outlook for the Western Region (04Z)", "Tropical Cyclone Outlook for the Western Region (06Z)", "Halls Creek Airport Weather Observations", "Tropical Cyclone Operational plan for the South Pacific & Southeast Indian Ocean, 2014 Edition", "Monthly Global Tropical Cyclone Summary October", 2010–2019 Australian region cyclone seasons, https://en.wikipedia.org/w/index.php?title=2020–21_Australian_region_cyclone_season&oldid=996097647, Use Australian English from December 2020, All Wikipedia articles written in Australian English, Articles with Indonesian-language sources (id), Creative Commons Attribution-ShareAlike License, Western Australia, Northern Territory, South Australia, This page was last edited on 24 December 2020, at 14:37. 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