Jump to content

Cyclone Tasha

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Wonderworld1995268 (talk | contribs) at 03:16, 31 December 2010 (Same Image from the MODIS Gallery). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Tropical Cyclone Tasha
Category 1 tropical cyclone (Aus scale)
Tropical storm (SSHWS)
Cyclone Tasha several hours after moving inland on 25 December
Formed24 December 2010
Dissipated25 December 2010
Highest winds10-minute sustained: 75 km/h (45 mph)
1-minute sustained: 75 km/h (45 mph)
Lowest pressure993 hPa (mbar); 29.32 inHg
FatalitiesNone reported
Damage$1.4 billion (2010 USD)
Areas affectedQueensland and New South Wales, Australia
Part of the 2010–11 Australian region cyclone season

Tropical Cyclone Tasha was a short-lived, but devastating tropical cyclone that caused widespread flooding in Queensland, Australia during the Christmas holiday.

Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

Tropical Cyclone Tasha was first identified on 24 December 2010 by the Joint Typhoon Warning Centre (JTWC) as a weak area of low pressure accompanied by increasing deep convection. At the surface, the structure of the storm's circulation was uncertain as feeder bands provided a clear indication of its centre; however, the lack westerly winds at the surface refuted this. Situated roughly 370 kilometres (230 miles) east-northeast of Cairns, Queensland, favorable environmental conditions, such as low wind shear, would allow for further development of the low.[1] Later on 24 December, the Australian Bureau of Meteorology (BOM) classified the system as a tropical low.[2] Shortly thereafter, the system rapidly consolidated as deep convection formed around a well-defined low-level circulation. This prompted the JTWC to issue a Tropical Cyclone Formation Alert as they anticipated the system to intensify into a tropical cyclone within the following 24 hours.[3] At 1600 UTC, the BOM upgraded the low to a Category 1 cyclone, assigning with the name Tasha.[4]

Within hours of the BoM declaring Tasha a tropical cyclone, the JTWC followed suit and issued their first advisory on the storm, designating it as Tropical Cyclone 04P. Situated along the northwestern edge of a subtropical ridge, Tasha tracked southwestward towards Queensland, Australia and intensified.[5] The storm attained its peak intensity on 24 December with winds of 75 km/h (45 mph) and a barometric pressure of 993 mbar (hPa; 29.32 inHg).[6] Hours later, the centre of Tasha made landfall between Cairns and Innisfail at this intensity.[7] Later that day, the BOM issued their final advisory on Tasha as it weakened to a tropical low over Queensland;[8] the JTWC followed suit shortly thereafter.[9] The remnants of Tasha persisted in the region for several more days, bringing heavy rains to much of Queensland.[10]

Impact and aftermath

Following the Bureau of Meteorology's first advice for the tropical low on 24 December, a cyclone warning was declared for areas between Port Douglas and Lucinda, Queensland. Some parts of Queensland were already suffering from flooding and addition rainfall was expected to worsen the situation.[2]

Although a relatively weak storm, Tasha produced widespread torrential rains in Queensland, amounting to more than 250 mm (9.8 in) in some areas.[10] These rains came on the heels of a ten year drought that plagued southern Queensland. Thousands of hectares of cropland were inundated by floods and many towns and cities were underwater. In Theodore, much of the area was flooded after the Dawson River reached its highest level in 50 years, cresting around 14 m (46 ft).[11] This surpassed the previous record by more than 50 cm (1.6 ft).[12] Efforts to evacuate the entire town of 300 were made as water levels continued to rise.[12] Thousands of people were evacuated by local authorities using military helicopters.[11] The town of Ingham was isolated as the Herbert River reached a level of 12.2 m (40 ft).[10] The town of Dalby was split in two by the swollen Myall Creek, leaving more than 100 homes flooded.[13]

By 28 December, nearly half of Queensland was flooded and preliminary damage estimates exceeded A$1.4 billion. Total economic losses also reached A$6 billion, roughly 0.5% of the nation's gross domestic product.[14]

In New South Wales, 175 people were evacuated to emergency shelters as the flooding spread south. An additional 800 people were isolated in the towns of Urbenville and Bonalbo on 28 December as flood waters blocked off roads.[12]

In response to the severe flooding, the Government of Queensland declared numerous towns as disaster areas, allowing for federal funds to be used. By 27 December, flood waters began to recede in Babinda and Gordonvale, leaving behind debris and thick black mud.[10] The following day, Prime Minister Julia Gillard announced that additional Blackhawk helicopters would be sent to assist in evacuation efforts.[11]

See also

References

  1. ^ "Significant Tropical Weather Outlook for the Western and South Pacific Oceans". Joint Typhoon Warning Centre. United States Navy. 24 December 2010. Retrieved 26 December 2010.
  2. ^ a b "Tropical Cyclone Advice Number One". Queensland Tropical Cyclone Warning Centre. Australian Bureau of Meteorology. 24 December 2010. Retrieved 26 December 2010.
  3. ^ "Tropical Cyclone Formation Alert". Joint Typhoon Warning Centre. United States Navy. 24 December 2010. Retrieved 26 December 2010.
  4. ^ "Tropical Cyclone Advice Two". Queensland Tropical Cyclone Warning Centre. Australian Bureau of Meteorology. 24 December 2010. Retrieved 26 December 2010.
  5. ^ "Tropical Cyclone 04P (Tasha) Advisory 001". Joint Typhoon Warning Centre. United States Navy. 24 December 2010. Retrieved 27 December 2010.
  6. ^ "Tropical Cyclone Technical Bulletin 1853 UTC 24 December 2010". Queensland Tropical Cyclone Warning Centre. Australian Bureau of Meteorology. 24 December 2010. {{cite web}}: Text "28 December 2010" ignored (help)
  7. ^ "Tropical Cyclone Advice Number Three". Queensland Tropical Cyclone Warning Centre. Australian Bureau of Meteorology. 24 December 2010. Retrieved 28 December 2010.
  8. ^ "Tropical Cyclone Advice Four". Queensland Tropical Cyclone Warning Centre. Australian Bureau of Meteorology. 24 December 2010. Retrieved 28 December 2010.
  9. ^ "Tropical Cyclone 04P (Tasha) Advisory 002". Joint Typhoon Warning Centre. United States Navy. 25 December 2010. Retrieved 28 December 2010.
  10. ^ a b c d Josh Robertson, Andrew MacDonald and Peter Michael (27 December 2010). "Cyclone Tasha leaves Queensland waterlogged and facing $1b damages bill". The Courier-Mail. The Australian National News. Retrieved 28 December 2010.
  11. ^ a b c Staff Writer (28 December 2010). "Flooding Forces Mass Evacuations In Australia". RTT News. Retrieved 28 December 2010.
  12. ^ a b c Staff Writer (28 December 2010). "Australians evacuate flood-hit Queensland towns". BBC News. Retrieved December 28, 2010.
  13. ^ Australian Associated Press (28 December 2010). "More Qld evacuations as floods rage on". The Sydney Morning Herald. Retrieved 28 December 2010. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  14. ^ David Uren and Andrew Fraser (28 December 2010). "Floods deal $6bn blow to economy as 1000 evacuated in Queensland deluge". The Australian. Retrieved 28 December 2010. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
Retrieved from "https://en.wikipedia.org/w/index.php?title=Cyclone_Tasha&oldid=405106432"