2005–06 Southern Hemisphere tropical cyclone season
 | This article documents a current event. Information may change rapidly and initial news reports may be unreliable. The latest updates to this article may not reflect the most current information. |
Template:Infobox hurricane season needed
| Southwest Indian Ocean Cyclone Scale | ||||
|---|---|---|---|---|
| Category | Wind speed | |||
| Knots | ||||
| Tropical Disturbance | 28 < | |||
| Tropical Depression | 28–33 | |||
| Moderate Tropical Storm | 34–47 | |||
| Severe Tropical Storm | 48–63 | |||
| Tropical Cyclone | 64–89 | |||
| Intense Tropical Cyclone | 90–115 | |||
| Very Intense Tropical Cyclone | > 115 | |||
| Australian Cyclone Scale | ||||
|---|---|---|---|---|
| Category | Wind speed | |||
| Knots | ||||
| Tropical Low | 33 < | |||
| Tropical Cyclone | 34–63 | |||
| Severe Tropical Cyclone | > 64 | |||
| South Pacific Cyclone Scale | ||||
|---|---|---|---|---|
| Category | Wind speed | |||
| Knots | ||||
| Tropical Disturbance | N/A | |||
| Tropical Depression | 33 < | |||
| Tropical Cyclone | > 34 | |||
The 2005-06 Southern Hemisphere tropical cyclone season runs year-round, starting on July 1, 2005 and ending June 30, 2006, reaching its peak mid-February to early March.
Naming and scope
The scope of this article is limited to the Southern Hemisphere. Three major basins are located in the southern hemisphere (Southwest Indian Ocean, Australian Region, South Pacific Ocean). South Atlantic tropical cyclones rarely develop due to cooler waters, the lack of an ITCZ, and wind shear.
Southern Hemisphere adopted a naming system slightly different from the Atlantic one and is explained below. Names are assigned by Madagascar, Mauritius, Australia, Papua New Guinea or Fiji.
Tropical depressions in the Southern Hemisphere are assigned an "S" suffix if formed in the Indian Ocean, a "P" suffix (South Pacific), an "F" suffix (Fijian area of responsibility), a "U" suffix (Australian area of responsibility), or an "M" suffix (La Réunion AOR).
Storms
Southwest Indian Ocean
Tropical Storm 01S (02M)
Tropical Disturbance 02M formed approximately 860 nautical miles (1,590 km) east of Diego Garcia on October 12. It became more organised and the JTWC upgraded it to a Tropical Cyclone with a peak intensity of 35kt between October 14 and October 15. Due to growing wind shear, the system dissipated over water on October 15.
- Météo France's archive on the system, in French. The system never reached Tropical Storm strength based on Météo France's advisories.
Overland Depression (07M)
A zone of disturbed weather developed on December 29. Moving southwestwards, it became an overland depression with maximum sustained winds of 25kt in Mozambique on January 5. The system tracked along the southern coast of Mozambique and became extratropical on January 8. The depression caused torrential rains in Mozambique and swept away 26 people.[1]
- Météo France's archive on the system, in French.
Intense Tropical Cyclone Boloetse
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A zone of disturbed weather developed northeast of Magadascar on January 20. The system organized into a Tropical Depression on January 24 and further intensified into Moderate Tropical Storm Boloetse on 25 January. The name was contributed by Lesotho. On 26 January, Boloetse briefly became a severe tropical storm with maximum sustained winds 50kt (92 km/h) near center. On January 29, Tropical Storm Boloetse crossed the coast near the village of Mananjary. On January 30, its remnants emerged into Mozambique Channel and reorganized. The system strengthened into a Severe Tropical Storm again on February 2, and strengthened further into an intense tropical cyclone. Boloetse passed just southwest of Magadascar on February 4 and became extratropical on February 5.
Moderate Tropical Storm 12S (09R)
A tropical disturbance formed just west of Madagascar on February 15. It moved south-east, towards Mauritius and became more organized. On February 19, it was designated as Tropical Disturbance 09. The midget system quickly strengthened but its status was under dispute. Météo France upgraded it to a moderate tropical storm while JTWC classified it as a Tropical Storm equivalent. In contrast, Mauritius did not upgrade and name the system. The storm was short-lived, it rapidly weakened on February 20 and dissipated over water on February 23.
Very Intense Tropical Cyclone Carina
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Tropical depression 14S (10R) formed far southeast of Diego Garcia on February 23. It became more organized and was upgraded to Moderate Tropical Storm Carina by Réunion at 1800 UTC February 23. The name was contributed by Mauritius. Carina moved southwards, and became a tropical cyclone on February 26. Carina remained over open waters and quickly intensified, becoming an intense tropical cyclone on February 27. At 0000Z Feb 28, Carina was moving west-southwest and nearing Category 5 strength on the Saffir-Simpson hurricane scale. Carina moved into an area with high wind shear on February 28, started to weaken and dissipated over open water on March 3.
Severe Tropical Storm Diwa
On March 2, Météo France identified a broad area of low pressure between 45°E and 55°E and from 8°S to 15°S. Within this area, two lows were detected. The main one (11R) was north of Mascarnes Islands while the other one was north of Madagascar.
11R became a tropical depression on March 3 and was later named Diwa. The name was contributed by Malawi. At first Diwa was classfied as a moderate tropical storm by Mauritius, but as a tropical depression by Météo France, but a few hours later, Météo France also classified it as a tropical storm. This made the fourth documented case of a tropical cyclone being named before reaching tropical storm strength. [citation needed]
On the other hand, the other low briefly developed into a tropical disturbance (12R) on March 4. The two systems were less than 700 km away and Météo France said that Diwa might be partially influenced by a slight Fujiwhara effect with 12R. 12R was short-lived and Diwa remained the dominant system. Diwa came very near to Réunion but never made landfall. The outer edges of Diwa did caused some subtantial rainfall on the island. The strongest gust reported was 194 km/h at the top of theSainte-Rose Large-Piton. The highest rainfall in three days was 2720 mm in Commerson. After this, Diwa moved southwards and strengthened into a severe tropical storm on March 7. Eventually, Diwa became extratropical and reached its peak intensity on March 9.
Other Systems
- Tropical Disturbance 01M (September 5-September 6) (Météo France's archive, in French.)
- Tropical Depression 03M (November 2-November 11) (Météo France's archive, in French.)
- Tropical Depression 04M
- Intense Tropical Cyclone Bertie-Alvin
- Tropical Depression 06M
Southeast Indian Ocean/Western Australia
Tropical Cyclone 02S (04M)
TCWC Perth issued a gale warning on a Tropical Low near 8.3S 97.1E on November 5. According to JTWC, the low developed into a tropical cyclone and reached its peak intensity of 45kt on the same day. It moved southwestward into Météo France (Réunion)'s of Responsibility on November 7 and gradually weakened afterwards. The last JTWC warning was released the next day. Météo France tracked its remnants until November 9.
- Météo France's archive on the system, in French. The system never reached Tropical Storm strength based on Météo France's advisories.
Severe Tropical Cyclone Bertie-Alvin
TCWC Perth issued a gale warning on a Tropical Low near 3.5S 94.0E, which later became Bertie on November 17. Bertie gradually strengthened and became a Severe Tropical Cyclone on November 21, before entering the Southwest Indian Ocean on November 23 and being renamed Alvin. According to the JTWC, the cyclone reached its peak intensity of 115 kt (210 km/h) - which equates to a marginal Category 4 on the Saffir-Simpson hurricane scale - on the same day. Alvin weakened significantly afterwards and the last JTWC warning was released on November 26. Météo France tracked its remnants until November 30.
- Météo France's archive on the system, in French.
Tropical Cyclone 04S (06M)
TCWC Perth issued a gale warning on a Tropical Low near 9.5S 91.9E on December 22. Moving west-southwestward, the low entered Météo France (Réunion)'s area of responsibility on December 23. During its long journey to the west, it became more organised and JTWC upgraded it to a Tropical Cyclone with peak intensity of 35kt between December 24 and December 25. The system then skirted east of Réunion as a zone of disturbed weather. Météo France tracked its remnants until December 30.
- Météo France's archive on the system, in French. The system never reached Tropical Storm strength based on Météo France's advisories.
Severe Tropical Cyclone Clare
A tropical low formed north of Northern Territory and tracked roughly parallel to the coast. On January 7, TCWC Perth started issuing tropical cyclone advisories on this system. The low became Tropical Cyclone Clare when it was located 250 km north of Cape Leveque or 430 km north of Broome. A steady strengthening trend continued and Clare peaked as a 70 mph storm, or a Category 3 cyclone on the Australian scale, with an unusually low pressure of 960 mbar. On January 9 the cyclone made landfall near Karratha and Dampier next day, and dissipated on the 10th as it continued inland.
In preparation of the storm, 1,500 people were evacuated, while incoming flights and mining operations were closed. [2] Although sustained wind speeds of 131km/h and gusts of up to 142km/h were recorded, the towns affected by TC Clare escaped with only minor structural damage. The rain depression associated with Ex-Tropical Cyclone Clare caused extensive flooding in the towns of Walkaway and Lake Grace over the weekend of 14-15 January. News article. Because it made landfall at low tide, storm surge damage was negligable. [[3]] Overall, damage was minor, and Clare was responsible for no deaths.
Severe Tropical Cyclone Daryl
On January 17, TCWC Perth started issuing tropical cyclone advices for a tropical low overland. The low tracked into Kuri Bay next day and developed into Tropical Cyclone Daryl. It continued to strengthen, and on January 21 briefly became a Severe Tropical Cyclone. Over the next two days, Daryl tracked parallel to the West Australian coast, mostly as a Category 2 system. Daryl continued tracking in a south-westerly direction before being downgraded to a low-pressure system on January 23. The cyclone did not cross the coast.
Tropical Cyclone Emma
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On February 26, TCWC Perth started issuing tropical cyclone advices as a tropical low was developing far north of Exmouth. The low moved slowly southward at first, and then accelerated. The Tropical Low became a category 1 cyclone on the Australian scale on February 27. Emma accelerated southwards and crossed the coast near Mardie on February 28. At that time, Emma only had peak winds of about 35 mph. But since Emma covered a very large area, her effects were felt in almost the entire western extent of Australia. The heavy rain associated with Emma caused substantial flooding in the Pilbara region, where she came ashore. In Wittenoom, Western Australia, 7.8 inches of water fell from the sky in 48 hours[4]. 15 days after Emma made landfall, overflowing rivers still threatened cities such as Kalbarri in Western Australia[5]. No fatalities were reported from Emma.
Severe Tropical Cyclone Floyd
On March 21, TCWC Perth started issuing advises on a Tropical Low. That low later strengthened to Tropical Cyclone Floyd as a Category 1 on the Austrialian scale. Overnight on March 22, it reached Category 3 classification on the Australian scale due to its strengthening gusts. Strengthening further, Floyd reached Australian Category 4 at 8Template:PM AWST (1200 UTC) on March 23 and the title "Severe Tropical Cyclone" was amended.
Current Storm Information
The system is not expected to affect land within the next 48 hours. Floyd changed course some time before 8 [[{{{1}}}]] AWST (0000 UTC) March 24 and is now moving SbW at 15 km/h. The system has central pressure 915 hPa and sustained winds near the center are reaching 105 knots, making the system a high-end Category 3 by the Saffir-Simpson scale.
- Latest information bulletin from TCWC Perth
- Latest forecast track map from TCWC Perth
Tropical Low
Cocos Islands faced their first cyclone threat this cyclone season on March 25 when a tropical low developed to its east-northeast.
- Latest cyclone advice from Perth
- Latest forecast track map from Perth
Arafura Sea and Gulf of Carpentaria/Northern Australia
Tropical Low
A tropical low developed off the north coast of the Top End in late January. It made landfall in the Darwin area and drifted down the western border of the Northern Territory. The low brought heavy falls to many parts of the western Northern Territory. The low continued to move south through the Victoria River District and into the Tanami Desert. The Victoria Highway was cut by floodwaters, isolating Timber Creek and the Victoria River Crossing. On January 31, the low deepened producing near gale force winds.
- Significant Weather Summaries from Australian Bureau of Meteorology
Tropical Low
A tropical low entered Joseph Bonaparte Gulf on March 21. The low made landfall just west of Northern Territory/Western Australia border. Though slightly inland, the low showed potential for development and TCWC Darwin started issuing tropical cyclone advisories on this system on March 24.
- Latest cyclone advice from Darwin
- Latest coastal waters wind warning from Darwin
- Latest track map from Darwin
Coral Sea/Eastern Australia
Severe Tropical Cyclone Jim
TCWC Brisbane issued a gale warning for a Tropical Low off the Queensland east coast on January 26. It was upgraded to Tropical Cyclone Jim on the morning of January 28 as it moved in an easterly direction. Jim moved out of Brisbane's area of responsibility on January 30 and was then monitored by Fiji. Jim gradually turned south-southeastward and became extratropical on February 1.
The extratropical remnants of Jim (08F) lingered around and then moved northwest. On February 3, 08F was again mentioned in a bulletin issued by Fiji. However, on the following day, the number 08F was dropped in Fiji bulletin while Brisbane called it a tropical low instead of Ex-Jim. The low was quasi-stationary and gradually weaken afterwards. It is questionable whether this system is a continuation of Jim.
Despite being well to the west of that country, Cyclone Jim was blamed for extensive flooding in Fiji, with the western coast of the island of Viti Levu - including the city of Lautoka - inundated by floodwaters on January 29. Article. Fortunately, no fatalities were reported in any of the areas affected by the cyclone.
Tropical Cyclone Kate
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TCWC Brisbane issued a gale warning for a Tropical Low near the northern tip of Cape York Peninsula on February 22. The low moved in an easterly direction. It quickly strengthened and became Tropical cyclone Kate on the same day. Kate moved eastwards and weakened into a tropical low on February 24.
Severe Tropical Cyclone Larry
TCWC Brisbane issued a gale warning for a Tropical Low in the Coral Sea on March 16. On the same day, RSMC Nadi classified it as a deepening tropical depression (15F). On March 17, the tropical low strengthened into Tropical Cyclone Larry. Larry moved towards the Queensland coast and gradually intensified to Category 5 on the Australian scale, making landfall with that strength on March 20. Larry was downgraded to a tropical low at night.
Other System
Solomon Sea and Gulf of Papua/Papua New Guinea
No storms have occurred in the Solomon Sea/Gulf of Papua/Papua New Guinea area.
South Pacific/Fiji
Tropical Cyclone Tam
Tam originated as Tropical Depression 04F near 15S 179.5E on January 6. The system then lingered around for a few days, appearing to significantly weaken, only to strengthen later. As Tam moved southeastward on January 12, a gale warning was issued for Tonga and later for Niue as well as American Samoa. Tam accelerated towards south-southeast and became extratropical on January 14. Tam was the first tropical cyclone to occur within the area of responsibility of TCWC Wellington this year.
Tropical Cyclone Urmil
Urmil formed near 14S 174E as Tropical Depression 06F on January 13 and erupted overnight with rapid development. A Tropical cyclone warning was then issued for Tonga. Urmil continued to strengthen and broke the constraints for Dvorak technique. It almost reached hurricane intensity on January 14. Urmil accelerated towards southeast and was declared extratropical once it entered the area of responsibility of TCWC Wellington on January 15.
Tropical Cyclone Vaianu
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Tropical Depression 12F formed near 14.5S 176.1W on February 10 and a tropical cyclone alert was raised in Tonga. This is the third tropical system to threaten Tonga this season. At that time, another Tropical Depression (11F) was to its south causing unstable movements of the two depressions. On the next day, 12F became the dominant system and moved south. Strengthening into Tropical Cyclone Vaianu, it turned southwest and passed between Fiji and Tonga. On February 13, Vaianu resumed a southward track and reached hurricane intensity. Vaianu then struck the Tonga islands as a category 1 cyclone on the Saffir-Simpson scale, knocking down power lines and flattening crops, such as banana and mango trees. In Nuku'alofa, low lying areas were shut down because of flooding. On February 13, Vaianu reached it's peak intensity of 85 mp/h, but these peak winds were well away from the Tonga and Fiji islands, but Tonga still felt Vaianu's winds. Then, the cyclone accelerated towards the southeast, entered TCWC Wellington's area of responsibility and became extratropical on February 16.
Severe Tropical Cyclone Wati
Tropical Depression 16F formed on March 17 and strengthened into Tropical Cyclone Wati on March 19 north of New Caledonia. It moved westwards and slowly strengthened into a Category 3 cyclone on the Australian scale before coming to a near standstill over the Coral Sea. After remaining stationary for most of March 22, Wati took a southeasterly course on March 23, gaining speed and continuing that course on March 24. A cyclone watch was issued for Lord Howe Island and a cyclone warning was issued for Norfolk Island. Wati passed between the two islands and became extratropical on March 25.
Other Systems
- Tropical Depression 01F (November 30-December 2)
- Tropical Depression 02F (December 3-December 6)
- Tropical Depression 03F (December 8-December 18)
- Tropical Depression 05F (January 10-January 13)
- Tropical Depression 07F (January 15-January 16)
- Tropical Cyclone Jim
- Tropical Depression 09F (January 30-January 31)
- Tropical Depression 10F (February 2-February 4)
- Tropical Depression 11F (February 8-February 10)
- Tropical Depression 13F (February 19-February 26)
- Tropical Depression 14F (March 13-March 16)
- Tropical Depression 15F
South Pacific/New Zealand
2005-06 storm names
Southwest Indian Ocean
According to the operational plan, a tropical disturbance is named when reaching the stage of moderate tropical storm. Unlike in Atlantic, subtropical cyclones are not qualified to have names. Names are assigned by Sub-regional Tropical Cyclone Advisory Centre in Madagascar (for west of 55°E) or Mauritius (for 55°-90°E). A new annual list is used every year so there is no need to consider the retirement of names.
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Southeast Indian Ocean and South Pacific
According to the operational plan, non-frontal low pressure systems of synoptic scale developing over warm waters are named whenever observations and/or Dvorak intensity analysis indicate the presence of gale force or stronger winds near the centre. It should be emphasized that an unnamed tropical system may have gales in one or more quadrants, but not near the centre. This is quite different from the Atlantic standard.
Names are assigned by the Australian Bureau of Meteorology or Papua New Guinea (for 90°E-160°E) or Fiji Meteorological Service (for 160°E-120°W). No tropical cyclone has ever been observed in South Pacific Ocean east of 120°W based on the JTWC's best track data. If there is one in the future, it is unclear how it will be handled. The most probable solution is to leave it unnamed like the South Atlantic tropical cyclone.
Only the names used during this cyclone season and the next few names on the sequential lists are listed below. For the complete list of names for each basin, see the WMO's official list. Names that have not yet been assigned are marked in gray. Bold names are currently active.
Southeast Indian Ocean/Western Australia
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Arafura Sea and Western Gulf of Carpentaria/Northern Australia
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Coral Sea and Eastern Gulf of Carpentaria/Eastern Australia
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Solomon Sea and Gulf of Papua/Papua New Guinea
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South Pacific/Fiji
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See also
- Tropical cyclone
- 2005 Atlantic hurricane season
- 2005 Pacific hurricane season
- 2005 Pacific typhoon season
- 2005 North Indian cyclone season
External links
- Joint Typhoon Warning Center (JTWC).
- Australian Bureau of Meterology (TCWC Perth).
- Australian Bureau of Meterology (TCWC Darwin).
- Australian Bureau of Meterology (TCWC Brisbane).
- Fiji Meteorolgical Service (RSMC Nadi).
- Meteorological Service of New Zealand, Ltd. (TCWC Wellington).
- Météo France (RSMC La Réunion).