1996-97 Australian Region Cyclone Season
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1996%E2%80%9397 Australian Region Cyclone Season
1996-97 Australian region cyclone season
1996-1997 Australian cyclone season summary.jpg
Season summary map
Seasonal boundaries
First system formedJuly 9, 1996
Last system dissipatedMay 16, 1997
Strongest storm
NamePancho-Helinda
 o Maximum winds205 km/h (125 mph)
(10-minute sustained)
 o Lowest pressure915 hPa (mbar)
Seasonal statistics
Tropical lows17
Tropical cyclones15
Severe tropical cyclones5
Total fatalitiesUnknown
Total damageUnknown
Related articles

The 1996-97 Australian region cyclone season was an above average tropical cyclone season. It ran from 1 November 1996 to 30 April 1996. The regional tropical cyclone operational plan also defines a tropical cyclone year separately from a tropical cyclone season, and the "tropical cyclone year" ran from 1 July 1996 to 30 June 1997.

Tropical cyclones in this area were monitored by four Tropical Cyclone Warning Centres (TCWCs): the Australian Bureau of Meteorology in Perth, Darwin, and Brisbane; and TCWC Port Moresby in Papua New Guinea.

Season summary

Cyclone RhondaCyclone JustinCyclone DrenaTropical cyclone scales#Comparisons across basins

Systems

Tropical Cyclone Lindsay

Category 1 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration9 July - 13 July
Peak intensity75 km/h (45 mph) (10-min)  990 hPa (mbar)

On 9 July, TCWC Perth reported that a tropical low had developed within the near-equatorial trough of low pressure, located about 500 km (310 mi) to the northeast of the Cocos Islands.[1] During that day the system moved to the southwest around a weak mid-upper level anticyclone, before it came under the starting to move southwards during 10 July. At 1000 UTC that day, TCWC Perth reported that the low had developed into a category one tropical cyclone, and named it Lindsay as the system reached its peak 10-minute sustained windspeeds of 75 km/h (45 mph). At 1500 UTC, the JTWC reported that Lindsay was becoming better organized and issued a Tropical Cyclone Formation Alert on the system. Six hours later while Lindsay was at its 1-minute peak intensity of 65 km/h (40 mph), the JTWC designated the system Tropical Cyclone 01S and started to issue warnings on it. After the JTWC had initiated warnings on the system, it began to rapidly weaken as it came under the influence of strong upper level north-westerlies. During the next day, both the JTWC and TCWC Perth issued their final advisories on Lindsay as it weakened below cyclone intensity and became extratropical. Lindsay's remnants were tracked as they moved towards the southeast until they were absorbed into a broad trough of low pressure on 13 July.[2]

Tropical Cyclone Melanie-Bellamine

Category 1 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration28 October - 1 November (Exited basin)
Peak intensity75 km/h (45 mph) (10-min)  990 hPa (mbar)

Melanie formed from a low near Cocos Island on 30 October 1996. It deepened to a category 2 storm overnight on 1 November and it moved westwards, with a subsequent name change to Bellamine. It dissipated on 11 November. [1]

Tropical Cyclone Nicholas

Category 1 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration12 December - 15 December
Peak intensity85 km/h (50 mph) (10-min)  985 hPa (mbar)

A tropical depression formed on 12 December 1996 near Timor. The depression moved south before being classified as a cyclone on 14 December and was named Nicholas. The storm made landfall west of Derby, Australia as a tropical storm on the 15th and dissipated the next day. [2]

Tropical Cyclone Ophelia

Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration13 December - 19 December
Peak intensity100 km/h (65 mph) (10-min)  980 hPa (mbar)

Ophelia formed between two tropical cyclones, Nicholas (near the north Kimberley coast) and Elvina near 80°E, to the east of Christmas Island on 13 December 1996. Its track was somewhat unusual in that it moved towards the southeast for most of its lifetime. The weak cyclone had no impact on Christmas Island or northwest Australia and dissipated on 19 December. [3]

Tropical Cyclone Fergus

Category 2 tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)
Duration23 December (Entered basin) - 25 December (Exited basin)
Peak intensity100 km/h (65 mph) (10-min)  975 hPa (mbar)

Fergus was a Category 2 storm that formed in the Pacific Ocean, lasting from 29 December to 31 December 1996 until becoming extratropical near New Zealand. The storm dropped heavy rainfall across an already saturated area, with totals of over 16.5 inches (425 mm) near Thames. The rainfall led to widespread flooding and forced many to evacuate. Severe road damage occurred, with some roads remaining closed for over a week. Gusty winds from Fergus downed trees and power lines, and caused property damage.[3]

Tropical Cyclone Phil

Category 2 tropical cyclone (Australian scale)
Category 2 tropical cyclone (SSHWS)
Duration26 December - 3 January
Peak intensity110 km/h (70 mph) (10-min)  975 hPa (mbar)

A weak cyclone, Phil crossed the northern part of Australia between 26 December and 27 December 1996. The storm then moved westward where it encountered vertical wind shear and dissipated on 31 December. It reformed on 9 January 1997 and finally dissipated on 12 January.

Severe Tropical Cyclone Rachel

Category 3 severe tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)
Duration2 January - 10 January
Peak intensity130 km/h (80 mph) (10-min)  965 hPa (mbar)

On 31 December, a tropical low formed from a monsoon trough inland, near Darwin. At that time, the convection was persistent on the mid-level circulation of the low as it moved slowly to the southwest. On 3 January, with favourable environmental conditions--including warm ocean waters and low wind shear, the low strengthened to Tropical Cyclone Rachel, while located to the south-southwest of Melville Island. [4] The cyclone then slowly accelerated to the southwest, before passing over Northern Kimberley, which weakened the storm. On 5 January, it moved offshore near Cape Leveque as it moved parallel to the coastline. It rapidly strengthened to a Category 3 severe tropical cyclone as it accelerated to the south-southeast, before making a direct hit on Port Hedland on the afternoon of 7 January.[5] It rapidly weakened inland and it was last noted on 10 January as it entered South Australia.[6]

Despite the cyclone passing directly over Port Hedland, the damages are mostly minor. The power was lost in parts of the town, and some trees are uprooted. There were also reports of flooding.[7] The highest accumulated rainfall by Rachel was on Yarrie, with 196 mm in over 24 hours.

Severe Tropical Cyclone Drena

Category 4 severe tropical cyclone (Australian scale)
Category 4 tropical cyclone (SSHWS)
Duration4 January (Entered basin) - 6 January (Exited basin)
Peak intensity165 km/h (105 mph) (10-min)  935 hPa (mbar)

Cyclone Drena crossed from the South Pacific on 4 January with winds of 140 miles per hour. The storm again crossed out 2 days later.

Tropical Cyclone 18S

Category 1 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration8 January - 12 January (Exited basin)
Peak intensity80 km/h (50 mph) (10-min) 

Severe Tropical Cyclone Pancho-Helinda

Category 4 severe tropical cyclone (Australian scale)
Category 4 tropical cyclone (SSHWS)
Duration18 January - 22 January (Exited basin)
Peak intensity195 km/h (120 mph) (10-min)  922 hPa (mbar)

Pancho formed to the north of Cocos Islands during 20 January 1997. It moved south towards Cocos Islands, then moved southwest, intensifying rapidly to a Category 4 or Category 5 cyclone with an estimated central pressure of 925 hPa by the morning of 22 January. Pancho then was renamed Helinda by the Mauritian TCWC and weakened. By 29 January Pancho/Helinda was moving from the northwest towards Cocos Islands again, however again it changed direction to the southwest and reintensified to Category 4. It finally weakened to a tropical depression by 5 February.[8]

Tropical Cyclone Gillian

Category 1 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration10 February - 12 February
Peak intensity85 km/h (50 mph) (10-min)  995 hPa (mbar)

Tropical Cyclone Gillian existed from 10 February to 12 February.

Tropical Cyclone Harold

Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration16 February - 21 February
Peak intensity110 km/h (70 mph) (10-min)  975 hPa (mbar)

Tropical Cyclone Harold existed from 16 February to 21 February.

Tropical Cyclone Ita

Category 1 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
Duration23 February - 24 February
Peak intensity85 km/h (50 mph) (10-min)  996 hPa (mbar)

Tropical Cyclone Ita existed from 23 February to 24 February.

Tropical Cyclone Justin

Category 3 severe tropical cyclone (Australian scale)
Category 2 tropical cyclone (SSHWS)
Duration3 March - 29 March
Peak intensity150 km/h (90 mph) (10-min)  955 hPa (mbar)

Justin had a long 3½ week life in March 1997. Peaking as a Category 3 cyclone, and making landfall as a Category 2, it caused significant damage in the Cairns region which it approached on two occasions. It was the largest cyclone to hit Northern Queensland in 1997. Houses were undermined by huge waves, a marina and boats were severely damaged, roads and bridges suffered from flood and landslide damage and huge losses were inflicted on sugar cane, fruit and vegetable crops. The death toll in Queensland was seven including five on a yacht which sank. There were 26 who died in Papua New Guinea which was also severely affected. Total estimated costs in Australia were $190 million (1997 values).

Severe Tropical Cyclone Rhonda

Category 4 severe tropical cyclone (Australian scale)
Category 3 tropical cyclone (SSHWS)
Duration10 May - 17 May
Peak intensity175 km/h (110 mph) (10-min)  935 hPa (mbar)

This stormed formed in the southern Indian Ocean on 10 May 1997. It dissipated on 16 May. [4]

Other systems

On October 15, TCWC Perth reported that a tropical low developed within a near equatorial trough of low pressure about x, to the southwest of X on the Indonesian island of Sumatra. Over the next few days, the low moved into the South-West Indian Ocean basin while developing further, before being named Antoinette by RSMC La Réunion during October 18.

Seasonal effects

Name Dates Peak intensity Areas affected Damages
(AU$)
Damages
(US$)
Deaths
Category Wind speed
(km/h (mph))
Pressure
(hPa)
Lindsay 9-13 July Category 1 tropical cyclone 75 km/h (45 mph) 990 hPa (29.23 inHg) None None None None
Antoinette 15-17 October Tropical Low 35 km/h (25 mph) 1,000 hPa (29.53 inHg) None None None None [9]
Melanie 28 October - 1 November Category 2 tropical cyclone 95 km/h (60 mph) 990 hPa (29.23 inHg) None None None None
Nicholas 12-15 December Category 1 tropical cyclone 85 km/h (50 mph) 985 hPa (29.09 inHg) Indonesia, Western Australia
Ophelia 13-19 December Category 2 tropical cyclone 100 km/h (65 mph) 980 hPa (28.94 inHg) None
Fergus 23-25 December Category 2 tropical cyclone 110 km/h (70 mph) 975 hPa (28.79 inHg) Solomon Islands
Phil 26 December - 3 January Category 2 tropical cyclone 110 km/h (70 mph) 975 hPa (28.79 inHg) Northern Territory, Western Australia
Rachel 2-10 January Category 3 severe tropical cyclone 130 km/h (80 mph) 965 hPa (28.50 inHg) Northern Territory, Western Australia
Drena 4-6 January Category 4 severe tropical cyclone 170 km/h (105 mph) 935 hPa (27.61 inHg) Solomon Islands, Vanuatu, New Caledonia, Norfolk Island and New Zealand
Unnamed 7-12 January Category 1 tropical cyclone Unknown (Unknown) Unknown
Pancho 18 January - 4 February Category 5 severe tropical cyclone 215 km/h (130 mph) 915 hPa (27.02 inHg) None
Gillian 10-12 February Category 1 tropical cyclone 75 km/h (45 mph) 995 hPa (29.38 inHg) Queensland
Harold 16-21 February Category 2 tropical cyclone 100 km/h (65 mph) 975 hPa (28.79 inHg) None
Ita 23-24 February Category 1 tropical cyclone 85 km/h (50 mph) 996 hPa (29.41 inHg) Queensland
Justin 3-29 March Category 3 severe tropical cyclone 150 km/h (90 mph) 955 hPa (28.20 inHg) Solomon Islands, Papua New Guinea, Queensland
Rhonda 10-16 May Category 4 Severe Tropical Cyclone 185 km/h (115 mph) 935 hPa (27.61 inHg) Cocos Island, Western Australia None None None [10]
Season aggregates
17 systems 9 July - 16 May 215 km/h (130 mph) 915 hPa (27.02 inHg)


See also

References

  1. ^ Hanstrum, B N; Bate P W. "The South Pacific and Southeast Indian Ocean Tropical Cyclone Season 1996-97" (PDF). Australian Meteorological Magazine. Australian Bureau of Meteorology. 48: 121-138. Retrieved 2011.
  2. ^ Perth Tropical Cyclone Warning Center. Western Australia Tropical Cyclone Season Summary 1996-97 (Report). Australian Bureau of Meteorology. Retrieved 2011.
  3. ^ TCWC Wellington (2009). "Cyclone Fergus". MetService. Archived from the original on February 21, 2005. Retrieved 2009.
  4. ^ Bureau of Meteorology. Severe Tropical Cyclone Rachel, 3 - 8 March 1997 (Report). Australian Bureau of Meteorology. Archived (PDF) from the original on 6 September 2015. Retrieved 2015.
  5. ^ Bureau of Meteorology. Severe Tropical Cyclone Rachel, 3 - 8 March 1997 (Report). Australian Bureau of Meteorology. Archived (PDF) from the original on 6 September 2015. Retrieved 2015.
  6. ^ Hanstrum, B N; Bate P W. "The South Pacific and Southeast Indian Ocean Tropical Cyclone Season 1996-97" (PDF). Australian Meteorological Magazine. Australian Bureau of Meteorology. 48: 121-138. Archived from the original (PDF) on 2011-06-05. Retrieved 2011.
  7. ^ Hanstrum, B N; Bate P W. "The South Pacific and Southeast Indian Ocean Tropical Cyclone Season 1996-97" (PDF). Australian Meteorological Magazine. Australian Bureau of Meteorology. 48: 121-138. Archived from the original (PDF) on 2011-06-05. Retrieved 2011.
  8. ^ http://www.bom.gov.au/cyclone/history/wa/1997.shtml
  9. ^ https://web.archive.org/web/20050130042812/http://www.meteo.fr/temps/domtom/La_Reunion/base_cyclone/nom_annee/ANTOINETTE_1996.html
  10. ^ http://www.bom.gov.au/cyclone/history/pdf/rhonda.pdf

External links


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

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