Meteorological history | |
---|---|
Formed | 23 March 2017 |
Remnant low | 30 March 2017 |
Dissipated | 7 April 2017 |
Category 4 severe tropical cyclone | |
10-minute sustained (Aus) | |
Highest winds | 175 km/h (110 mph) |
Lowest pressure | 949 hPa (mbar);28.02 inHg |
Category 4-equivalent tropical cyclone | |
1-minute sustained (SSHWS) | |
Highest winds | 215 km/h (130 mph) |
Lowest pressure | 937 hPa (mbar);27.67 inHg |
Overall effects | |
Fatalities | 14 total |
Damage | $2.73 billion (2017 USD) (Second-costliest tropical cyclone in the Australian region basin) |
Areas affected | Queensland,New South Wales,New Zealand |
IBTrACS | |
Part of the 2016–17 Australian region cyclone season |
Severe Tropical Cyclone Debbie in 2017 was the strongest tropical cyclone to strike Queensland since Marcia in 2015,and was the costliest tropical cyclone in Australia since Yasi in 2011. Forming as a tropical low on 23 March,the low gradually intensified into a named tropical cyclone on 25 March. After steadily strengthening offshore to a Category 4 system,Debbie eventually made landfall near Airlie Beach,at 12:40 AEST on 28 March. [1] Afterwards,Debbie rapidly weakened into a tropical low by late 28 March,but continued to travel south,causing significant damage and flooding in the populous areas of South East Queensland and Northern Rivers. [1] In total,the storm caused A$3.5 billion (US$2.67 billion) in damage and fourteen deaths across Australia,primarily as a result of extreme flooding. This makes Debbie the deadliest cyclone to hit Australia since Fifi in 1991. [2]
On 22 March 2017, a well-defined but weak area of low pressure developed over the Coral Sea, near the Louisiade Archipelago of Papua New Guinea. Strong wind shear aloft kept the accompanying convection poorly organised and displaced west of the surface circulation. [3] With environmental conditions forecast to improve and favour cyclogenesis, the Australian Bureau of Meteorology's (BOM) Tropical Cyclone Warning Centre in Brisbane classified the system as a tropical low on 23 March. [4] Throughout the following day, decreasing shear enabled convection to wrap around the low; [5] however, convective activity remained largely transient. A mid-level ridge to the east and an approaching trough over the Tasman Sea steered the low generally south. [6] High sea surface temperatures of 29–30 °C (84–86 °F) and excellent dual-channel outflow fuelled rapid consolidation on 24 March. This prompted the United States-based Joint Typhoon Warning Center (JTWC) to issue a Tropical Cyclone Formation Alert, indicating the system was likely to acquire gale-force winds within 24 hours. [7]
A scatterometer pass at 11:56 UTC revealed surface winds of up to 75 km/h (47 mph) and subsequent satellite intensity estimates supported gale-intensity, and the JTWC accordingly classified the system as Tropical Cyclone 13P by 21:00 UTC. With exceptionally favourable environmental conditions ahead of the storm, the agency noted a high probability for rapid deepening before landfall in Queensland. [8] The BOM followed suit soon thereafter, classifying the system as a Category 1 tropical cyclone on the Australian cyclone intensity scale at 00:00 UTC on 25 March. Concurrently, they assigned it the name Debbie. [9]
The cyclone continued to track generally southwards, developing into a Category 2 cyclone later that day. After attaining that strength, Debbie assumed a generally southwestwards track—a track it would maintain, with minor fluctuations, until about 14 hours after landfall. [1] After a day-long period of arrested development, environmental conditions became highly favourable for renewed intensification. Beginning early on 27 March, Debbie strengthened rapidly from Category 2 to a Category 4 severe tropical cyclone in just 12 hours, and achieving peak sustained winds of 175 km/h (109 mph) and a minimum pressure of 949 hPa (28.02 inHg). [1] After that, the Dvorak intensity given that the storm weakened slightly. Debbie passed over the Whitsunday Islands in the morning of 28 March local time with winds of 165 km/h (103 mph), still at Category 4 intensity. Nonetheless, the cyclone weakened to Category 3 before making landfall in Airlie Beach at 02:40 UTC with winds of 150 km/h (93 mph). [1] [10]
Following landfall, Debbie began to weaken steadily while interacting with North Queensland's rugged terrain. The cyclone weakened below severe tropical cyclone status while passing Collinsville at 12:00 UTC on 28 March. [1] The system was downgraded to Category 1 in the early hours of 29 March local time, and then weakened further to a tropical low six few hours afterwards. [1] The tropical low then executed a long turn to the southeast, and proceeded towards South East Queensland, moving roughly parallel to the coast. [1] The remnants of Debbie brought heavy rainfall—torrential rains in many areas—that resulted in flooding in large parts of the land areas across which it tracked, before moving out over the Pacific Ocean on Friday 31 March. [1]
Major storm surge was seen as one of the most dangerous factors associated with the approaching cyclone. With the storm potentially coinciding with high tide, it was estimated that water rise in some areas could potentially exceed 7 m (23 ft). [11] Residents in low-lying areas across Bowen, Proserpine and Airlie Beach were ordered to evacuate their homes. Late on 27 March, just over 12 hours prior to landfall, 25,000 residents in low-lying areas of Mackay were ordered to evacuate. [12] Approximately 5,500 people in the Bowen area were also urged to leave. [11] Across Queensland, more than 400 schools and education centres were closed. [13] All flights at Townsville Airport, Proserpine/Whitsunday Coast Airport, Mackay Airport, Hamilton Island Airport and Moranbah Airport were cancelled from 27 March, [11] and Queensland Rail suspended train services between Rockhampton and Townsville. North Queensland Bulk Ports closed the ports at Mackay, Abbot Point and Hay Point. [14] A total of 1,000 emergency personnel and more than 200 Energex workers were deployed to the region to assist with Ergon Energy's preparations and clean up operations. [15] [11]
The Australian Defence Force formed Joint Task Force 661, dubbed "Operation Queensland Assist", to provide assistance with aeromedical evacuation, search and rescue, road clearance, restoration of essential services, emergency accommodation and the delivery of stores if required. [16] The Royal Australian Navy landing ship HMAS Choules set sail from Sydney to Queensland to support post-storm recovery. Normally, HMAS Canberra and HMAS Adelaide would be deployed; however, propulsion issues with the two vessels kept them docked for repairs. [17] Three MRH-90 helicopters from HMAS Albatross were also deployed to Queensland. [18] The Royal Australian Air Force put transport aircraft on standby at Townsville, RAAF Base Amberley and RAAF Base Darwin. [19] The Australian Defence Force's pre-deployment of resources was the largest in the nation's history in advance of a natural disaster; [13] approximately 1,200 personnel were deployed. [20]
There was criticism of the intense coverage of the cyclone by commercial TV media, including some unsafe actions by reporters. [21] Former Deputy Leader of Australian Greens, Adam Bandt, was criticised by the conservative government's Federal Energy Minister for suggesting that construction of new coal plants would cause climate change, and hence increase the intensity of extreme weather events like Cyclone Debbie. [22]
An unexpected turn to the south during the cyclone's final approach to the Queensland coast brought the storm directly on top of Hamilton Island, where no evacuations took place. [23] Damage was reported on the Whitsunday Islands, as strong winds lifted some roofs from houses; on Hamilton Island, sustained winds reached 191 km/h (119 mph) with gusts up to 263 km/h (163 mph) around 10:28 a.m. local time on 28 March. [24] [25] Winds in excess of 100 km/h (62 mph) battered the island for more than 24 hours. [26] Power outages affected at least 63,000 properties across Queensland, and numerous trees were uprooted during the storm, with some crashing onto homes. Many animals would have been left to die. [27] Major damage was reported across Bowen, where most homes had been built before stricter building codes were enforced. [28] Approximately 300 people, primarily tourists, on Daydream Island were left stranded and in dire need of supplies. [27] Attempts were made to evacuate residents from the island; however, ships were unable to dock as the jetty was destroyed. [20]
A flock of cockatoos was caught in the storm near Airlie Beach, and many died while clinging to tree branches. One particular bird, later nicknamed Debbie, was found stripped of its feathers by Townsville Bulletin photographer Alix Sweeney and rescued as the cyclone's eye passed through. The story of Debbie became a viral headline. [29] Although seemingly in good spirits once the storm cleared, [30] the bird died during the overnight of 29–30 March likely due to internal injuries. [31] [32]
Inclement weather and evacuations associated with the cyclone were blamed for a fatal car accident near Proserpine on 27 March, where one person died on-scene whilst two others were hospitalised. [33] [34] A man in Proserpine also suffered an injury and was hospitalised after a wall collapsed on him on 28 March. [35]
Torrential rains—described by the Bureau of Meteorology as "phenomenal" [36] —affected large portions of Queensland, particularly in the Pioneer Basin. Forty-eight-hour accumulations in the area exceeded 1,000 mm (39 in)—these areas see an average of 1,500 to 2,000 mm (59 to 79 in) of rain per year. [20] West of Mackay, the Kinchant and Middle Creek dams overflowed, prompting additional evacuation of residents. [36] Multiple sections of the Bruce Highway between Townsville and Mackay were submerged by floodwaters, prompting its closure. [37] The ex-tropical cyclone went on to cause damage further south, particularly around the Logan and Albert Rivers, flooding infrastructure such as the Beenleigh railway station and resulting in the death of a 77-year-old man in Eagleby. [38]
Damage to Queensland's sugar industry is expected to cost A$150 million (US$114.5 million). The majority of these costs lie in Proserpine and Mackay. 35% of all sugarcane in the Proserpine region and 20% of all sugarcane in the Mackay region were damaged, costing A$50 million (US$38.2 million) and A$81 million (US$61.8 million) respectively. [39] Damage to winter crops in the Bowen–Gumlu region reached A$100 million (US$76.4 million). [40] Insured losses across Australia reached A$1.65 billion (US$1.26 billion), with 73,000 damage claims being filed. [41] Total economic losses reached A$3.5 billion (US$2.67 billion). [1] In addition, a total of eight deaths were reported throughout Queensland. [42]
Ex-Tropical Cyclone Debbie continued to move south and merged with a cold front moving up the north coast of New South Wales. [43] This triggered heavy rainfall in the Northern Rivers and led to significant flooding in the Tweed, Lismore, Byron, Richmond Valley, Kyogle and Ballina local government areas. A woman drowned in floodwaters at a rural property south of Murwillumbah, while the Pacific Motorway was cut off by floodwaters at Chinderah. [44] New South Wales Premier Gladys Berejiklian declared the regions as disaster zones, thus enabling the residents to access disaster assistance funding. [45] Two more people were confirmed to have drowned in floodwaters on 1 April, another south of Murwillumbah and one at Gungal. [46]
On 3 April, a mother and two of her children drowned when their car plunged into the flooded Tweed River at Tumbulgum. [47] In total, Debbie killed six people in New South Wales. [42]
A week after becoming extratropical, the remnants of Cyclone Debbie passed over New Zealand, causing flash flooding over many areas. The township of Edgecumbe in the Bay of Plenty region was evacuated on April 6 due to flooding, and a state of emergency declared. [48] The insurance claims reached NZ$91.5 million (US$63.8 million). [49]
Queensland Premier Annastacia Palaszczuk pledged A$ 1,000,000 (US$ 754,205) to assist the Australian Red Cross Society, Salvation Army, St. Vincent de Paul Society of Queensland, and UnitingCare Community in distributing supplies. [27]
Debbie was the only name from the 2016–2017 season to be retired by the Bureau of Meteorology. It was replaced by Dara in mid-2018. [50]
The 1999–2000 Australian region cyclone season was a slightly above average tropical cyclone season. It ran from 1 November 1999 to 30 April 2000. The regional tropical cyclone operational plan also defines a "tropical cyclone year" separately from a "tropical cyclone season", with the "tropical cyclone year" for this season lasting from 1 July 1999 to 30 June 2000.
The 2002–03 Australian region cyclone season included Cyclone Inigo, which tied with Cyclone Gwenda in 1999 as the most intense tropical cyclone on record in the Australian basin. It began on 1 November 2002 and ended on 30 April 2003. The regional tropical cyclone operational plan also defines a tropical cyclone year separately from a tropical cyclone season, which runs from 1 July 2002 to 30 June 2003. These dates conventionally delimit the period of each year when most tropical cyclones form in the Australian region, which is defined as in the southern hemisphere between 90°E and 180°E. The season's ten tropical depressions existed within these dates, with the first, designated as Tropical Cyclone 07S, entering the basin on 27 December 2002. The last system, Cyclone Epi, dissipated on 6 June 2003. Tropical cyclones in this area were monitored by four Tropical Cyclone Warning Centres (TCWCs): the Australian Bureau of Meteorology (BOM) in Perth, Darwin, and Brisbane and one in Port Moresby, Papua New Guinea.
The 2008–09 Australian region cyclone season was a near average tropical cyclone season. It officially started on 1 November 2008, and officially ended on 30 April 2009. This season was also the first time that the BoM implemented a "tropical cyclone year." The regional tropical cyclone operational plan defines a "tropical cyclone year" separately from a "tropical cyclone season"; the "tropical cyclone year" began on 1 July 2008 and ended on 30 June 2009.
The 1969–70 Australian region cyclone season was an above-average tropical cyclone season. It ran from 1 November 1969 to 30 April 1970. The regional tropical cyclone operational plan also defines a "tropical cyclone year" separately from a "tropical cyclone season", with the "tropical cyclone year" for this season lasting from 1 July 1969 to 30 June 1970.
The 1971–72 Australian region cyclone season was a very active tropical cyclone season.
Severe Tropical Cyclone Ului was one of the fastest intensifying tropical cyclones on record, strengthening from a tropical storm to a Category 5 equivalent cyclone within a 30-hour span in March 2010. Throughout Queensland, Australia, infrastructural damage from the storm amounted to A$20 million (US$18 million) and agricultural losses reached A$60 million (US$54 million).
Severe Tropical Cyclone Rona and Severe Tropical Cyclone Frank were a pair of tropical cyclones that affected Queensland and New Caledonia during the 1998–99 Australian region cyclone season and the 1998–99 South Pacific cyclone season. Rona originated from a low that developed on 9 February about 225 km (140 mi) to the northeast of Cairns. Over the next couple of days, the low slowly developed further before it was upgraded into a Category 1 cyclone on the Australian intensity scale by the Australian Bureau of Meteorology on 10 February as it started to move towards the southwest. Subsequently, Rona rapidly intensified just before making landfall near the Cape York Peninsula. While the low-level circulation became difficult to locate on 12 February, the upper-level circulation eventually emerged into the Coral Sea and later regenerated into Tropical Cyclone Frank. The system rapidly intensified before making landfall on New Caledonia as a Category 2 cyclone on the Saffir-Simpson Hurricane Scale in the early morning hours of 20 February. Frank was re-classified as an extratropical cyclone the next day.
The 1978–79 Australian region cyclone season was the only season in which a reconnaissance aircraft flew into a tropical cyclone. Operationally, Australia's Bureau of Meteorology (BOM) tracked eleven tropical cyclones, while two additional systems were later added to the United States's Joint Typhoon Warning Center (JTWC) best track. Prior to 1985, the Australian region basin was defined as in the southern hemisphere between 80°E and 160°E, with the modern day season boundaries ranging from 1 November to 30 April of the following year. The first storm, an unnamed system, developed on 19 November 1978. The final cyclone, Kevin, dissipated by 12 May 1979. Tropical cyclones in this area were monitored by three Tropical Cyclone Warning Centres (TCWCs): the BOM in Perth, Darwin, and Brisbane.
Severe Tropical Cyclone Aivu was a powerful late-season tropical cyclone that caused extensive damage across parts of Queensland, Australia in April 1989.
Tropical Cyclone Tasha was a short-lived, but devastating tropical cyclone that exacerbated widespread floods in Queensland, Australia during the 2010 Christmas holiday.
Severe Tropical Cyclone Yasi was a powerful and destructive tropical cyclone that made landfall in northern Queensland, Australia in early 2011, causing major damage to the affected areas. Originating as a tropical low near Fiji on 26 January, the system intensified to tropical cyclone status during the evening of 30 January. Yasi deepened rapidly over the next 24 hours, and was classified as a Category 3 cyclone at about 5 PM AEST on 31 January 2011. Late on 1 February, the cyclone strengthened to a Category 4 system; then, early on 2 February, the cyclone intensified into a Category 5 Severe Tropical Cyclone. The system had a well-defined eye and continued to track west-southwestward, maintaining a central pressure of 930 hPa and a Dvorak intensity of T6.5 into the evening.
The 2013–14 Australian region cyclone season was a slightly below-average tropical cyclone season, with 10 tropical cyclones occurring within the Australian region. It officially started on 1 November 2013, and ended on 30 April 2014. The regional tropical cyclone operational plan defines a "tropical cyclone year" separately from a "tropical cyclone season"; the "tropical cyclone year" began on 1 July 2013 and ended on 30 June 2014.
The 2016–17 Australian region cyclone season, despite a very high number of tropical lows, was a slightly below-average season in terms of activity, with nine tropical cyclones, three of which intensified further into severe tropical cyclones; though it was much more active than the previous season. The season was the first to have a severe tropical cyclone since the 2014–15 season. It was the period of the year when most tropical cyclones form in the Southern Indian Ocean and Pacific Oceans between 90°E and 160°E. The season officially ran from 1 November 2016 to 30 April 2017, however, a tropical cyclone could form at any time between 1 July 2016 and 30 June 2017 and would count towards the season total. The first named storm, Yvette, developed during 21 December, and the final named storm, Greg, left the region on 3 May as a remnant low. This season was also the second-costliest tropical cyclone season on record in the Australian region basin, behind only the 2010–11 season, with a total of AUD$3.7 billion in damages incurred by the various storms, mostly from Cyclone Debbie.
Severe Tropical Cyclone Joy struck Australia in late 1990, causing the third highest floods on record in Rockhampton, Queensland. This cyclone began as a weak tropical low near the Solomon Islands, and initially moved westward. On 18 December, it was named Joy, becoming the 2nd named storm of the 1990–91 Australian region cyclone season. After turning southwest, Joy developed a well-defined eye and strengthened to maximum sustained winds of 165 km/h (103 mph) while approaching Cairns in Far North Queensland. Brushing the city with strong winds, the cyclone soon weakened and turned southeast. Joy later curved back southwest, making landfall near Townsville, Queensland on 26 December. It dissipated the next day; remnant moisture continued as torrential rainfall over Queensland for two weeks.
Severe Tropical Cyclone Winifred was the worst tropical cyclone to make landfall in northern Queensland and the first since Althea in 1971 to inflict significant damage on the northeastern coast of Australia. The sixth named storm of the 1985–86 Australian region cyclone season, Winifred originated as a tropical low north of Cairns, Queensland on 27 January 1986. Slowly organizing, the system was recognized as a tropical cyclone after gaining tropical characteristics on 30 January, christened with the name Winifred the same day. Meandering southward, the cyclone began to curve southeastward that evening before suddenly turning toward the coast, southwestward, on 31 January, steadily intensifying in that time. By the time it came ashore near Silkwood, Queensland at 0445 UTC on 1 February, it was producing Category 3-force winds on the Australian tropical cyclone intensity scale and a minimum atmospheric pressure of 957 mbar (28.38 inHg). Weakening as it drifted inland, Winifred persisted as a tropical depression for another five days after landfall before finally dissipating on 5 February.
Severe Tropical Cyclone Ita was the strongest tropical cyclone in the Australian region by central pressure since George in 2007, and by wind speed since Monica in 2006. The system was first identified over the Solomon Islands as a tropical low on 1 April 2014, and gradually moved westward, eventually reaching cyclone intensity on 5 April. On 10 April, Ita intensified rapidly into a powerful Category 5 system on the Australian Scale, but it weakened to a Category 4 system in the hours immediately preceding landfall the following day. At the time of landfall at Cape Flattery at 12 April 22:00 (UTC+10), the cyclone's Dvorak intensity was approximately T5.0, consistent with a weak Category 4 system, and considerably lower than the T6.5 observed when the system was at its peak intensity. Meteorologists noted the system had, at that time, begun an eyewall replacement cycle; as a result, the system was considerably less powerful than various intensity scales had predicted. As a result, Ita's impact on terrain was lessened.
Severe Tropical Cyclone Marcia was a powerful tropical cyclone that made landfall at its peak strength over central Queensland, near Shoalwater Bay on 20 February 2015. The cyclone went on to affect various areas including Yeppoon and Rockhampton. It passed just to the west of Yeppoon as a Category 4 system, then traversed over the regional city of Rockhampton as a Category 2 system on the same day. Eventually, the cyclone weakened, moved southeast out to sea, before dissipating. Marcia caused at least A$750 million (US$587 million) worth of damage.
Severe Tropical Cyclone Ada was a small but intense tropical cyclone that severely impacted the Whitsunday Region of Queensland, Australia, in January 1970. It has been described as a defining event in the history of the Whitsunday Islands, and was the most damaging storm in the mainland town of Proserpine's history at the time. Forming over the far eastern Coral Sea in early January, the weather disturbance that would become Ada remained weak and disorganised for nearly two weeks as it slowly moved in a clockwise loop. Accelerating toward the southwest, the system was named Ada on 15 January. All observations of the fledgling cyclone were made remotely with weather satellite imagery until it passed over an automated weather station on 16 January. The extremely compact cyclone, with a gale radius of just 55 km (35 mi), intensified into a Category 3 severe tropical cyclone just before striking the Whitsunday Islands at 14:00 UTC on 17 January. At 18:30 UTC, Ada's eye crossed the coast at Shute Harbour. The cyclone made little inland progress before stalling northwest of Mackay and dissipating on 19 January.
Severe Tropical Cyclone Nora was a strong tropical cyclone that affected Far North Queensland and the northeastern Northern Territory during March 2018. The ninth named storm and third severe tropical cyclone of the 2017–18 Australian region cyclone season, Nora developed from a tropical low which formed near the Torres Strait on 19 March. The system initially moved quickly to the west-northwest, and then began tracking slowly southwestwards over the Arafura Sea while gradually developing. A turn to the east on 22 March brought the tropical low into a favourable environment for strengthening, and the system reached tropical cyclone intensity later that day. Nora then underwent a period of rapid intensification as it moved southeastwards into the Gulf of Carpentaria. The storm peaked on 23 March as a high-end Category 3 severe tropical cyclone with sustained winds of 155 km/h (96 mph) and a minimum barometric pressure of 958 hPa (28.29 inHg). Nora made landfall north of Pormpuraaw at about 13:00 UTC on 24 March as a minimal Category 3 system. Nora weakened steadily as it tracked southwards along the coast, and was downgraded to a tropical low the following day. Nora's remnants meandered over land for several days before moving back over the Gulf of Carpentaria and dissipating on 28 March.
The following is a list of all reported tropical cyclones within the Australian region between 90°E and 160°E, after the start of World War II in September 1939 and before the start of the satellite era during the 1969–70 Season.
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