Tropical Cyclone Harry Harry formed on 15 December near the Sunda Strait, and moved west-southwest through its existence. Add new page. 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. The system then weakened and dissipated well east of Madagascar. Most visited articles. Within the North Atlantic Ocean, tropical or subtropical cyclones are named by the National Hurricane Center (NHC/RSMC Miami) when they are judged to have intensified into a tropical storm with winds of at least 34 kn (39 mph; 63 km/h). 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. This category has the following 14 subcategories, out of 14 total. [14][15] The system encountered somewhat weaker wind shear along its new track, allowing deep convection to develop closer to the low-level circulation centre. Pre-empting dangerous coastal erosion, conservation volunteers worked hard to relocate the nests of loggerhead turtles higher up the beache… [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. [4], The Northwestern sub-region encompasses the area east of 105°E, west of 130°E and north of 25°S. It reached Category 2 later that day and began to weaken. [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. [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. Within this region a tropical disturbance is classified as a tropical cyclone, when it has 10-minute sustained wind speeds of more than 65 km/h (35 mph), that wrap halfway around the low level circulation centre, while a severe tropical cyclone is classified when the maximum 10-minute sustained wind speeds are greater than 120 km/h (75 mph). Cyclone Lam was the strongest storm to strike Australia's Northern Territory since Cyclone Monica in 2006. [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. [78] On 17 December, a low-pressure system developed within the monsoon trough, near the northern coast of the Top End, and began to move westwards. [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). 278,219 Pages. 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. [30][31] Deep convection continued to develop near the centre during the overnight period, and as the low began to track eastwards, the JTWC upgraded the system to a tropical storm on the Saffir-Simpson hurricane wind scale at 18:00 UTC on 8 December. The outlook took into account the ENSO neutral conditions that had been observed across the Pacific and analogue se… According to the Australian Bureau of Meteorology, the most frequently hit portion of Australia is between Exmouth and Broome in Western Australia. 10-minute sustained winds of at least 50 km/h (31 mph) persisted for approximately four hours on Adele Island late on 8 December (UTC), peaking at 56 km/h (35 mph) at 21:00 UTC, with a 76 km/h (47 mph) gust observed shortly thereafter. [37] Sustained gale-force winds were observed at Bedout Island and Port Hedland around the time of landfall, peaking at 70 km/h (43 mph) at both locations. [43][46], The presence of the Madden–Julian Oscillation and an equatorial Rossby Wave in the Australian region contributed to the formation of another broad low-pressure system in the monsoon trough over the far eastern Indian Ocean during early December. The agency predicted a 66% chance of above average activity for the region as a whole, compared with the average of 11 tropical cyclones. Language; Watch; Edit (Redirected from Cyclone Lisa (1966)) The following is a list of Australian region tropical cyclones in or before 1940. With wind gusts of almost 300km/h, it destroyed about 350 homes and damaged almost 2000 properties in and around Yeppoon and Rockhampton. It officially started on 1 November 1988, and officially ended on 30 April 1989. Richard K. Donahue; Project maintenance. [20], Tropical Low 01U made its closest approach to the Cocos Islands on 27–28 November, passing a little more than 500 km (310 mi) to the west. The 2005–06 Australian region cyclone season was an above average tropical cyclone season. [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. The system crossed over the Cape York Peninsula and moved into the Gulf of Carpentaria, whereupon it gradually organized due to warm waters and … [25], On 6 December 2020, the Bureau of Meteorology (BOM) reported that a tropical low had developed within a monsoon trough near the western end of Java, approximately 200 km (125 mi) north-northeast of Christmas Island. The 1972–73 Australian region cyclone season was an above-average tropical cyclone season, in terms of activity. [86] After reaching the Dampier Peninsula on 20 December, the system turned sharply to the east and began tracking further inland. The number of tropical cyclones in the Australian region is generally higher with La Niña. The regional tropical cyclone operational plan also defines a tropical cyclone year separately from a tropical cyclone season, which runs from 1 … [4] The sub-region covers waters off Western Australia north of Shark Bay, and extends westward to Christmas Island. 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