Timeline of the 1990–91 South Pacific cyclone season

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Timeline of the
1990-91 South Pacific cyclone season
A map of the tracks of all the storms of the 1990–91 South Pacific cyclone season.
Season summary map
Season boundaries
First system formedNovember 23, 1990
Last system dissipatedMay 19, 1991
Longest lasting system
NameSina
Duration11 days
Storm articles
Other years
1990–91 2003–04

The

tropical cyclone naming lists.[1]

Within the South Pacific, tropical cyclones were monitored by the Tropical Cyclone Warning Centers (TCWC) at the

Saffir–Simpson Hurricane Scale
.

This timeline includes information from post-storm reviews by TCWC Nadi, TCWC Wellington, the JTWC, and the NWOC. It documents tropical cyclone formations, strengthenings, weakenings, landfalls, extratropical transitions, and dissipations during the season. Reports among warning centers often differ; therefore, information from all three agencies has been included.

Seasonal summary

Cyclone JoyCyclone SinaTropical cyclone scales#Comparisons across basins

As a result of the

Southern Cook Islands with total damage estimated at over 18.5 million before it was last noted on December 4, as it was absorbed by an advancing trough of low pressure near 50°S.[2][5] During December 15, the precursor tropical low to Cyclone Joy developed near the Solomon Islands.[5] Over the next two days the system moved westwards, before it moved into the Australian region during December 17.[2] The system was subsequently named Joy on December 19, before it made landfall on Queensland during December 26.[2]

The basin then remained quiet until March when three significant tropical depressions including 15 and 16P were observed within the Coral Sea/Australian region, which did not develop into tropical cyclones but were subject to gale warnings.[6] 15P was first noted on March 3, while it was located about 900 km (560 mi) to the east of the Solomon Islands and over the next couple of days subsequently moved south-westwards and out of the South Pacific basin during the next day.[7] 16P was first noted on March 14, while located about 300 km (185 mi) to the southeast of Honiara in the Solomon Islands.[8][A 3] Over the next couple of days the system moved towards the south-east before the JTWC designated the system 16P and initiated advisories on it during March 18 after it had moved into the South Pacific basin.[9] Over the next couple of days the system, moved towards the south-southeast before it turned towards the southwest and passed over New Caledonia on March 20, before it was last noted during the next day moving out of the basin.[8] The final tropical cyclone of the season, Lisa, moved into the Southern Pacific on May 11 at its peak intensity of 110 km/h (75 mph).[2][5] During the next day as the storm moved towards the subtropical jet, Lisa rapidly weakened into a tropical depression before passing over Anatom Island without causing any significant damage.[2] After the season both the names Sina and Joy were retired from the naming lists for the region, while it was determined that a weak gale force tropical cyclone had affected Tonga between December 14–17.[1][3][10]

Timeline

November

November 1
  • 0000 UTC, (1200 FST) – The 1990–91 South Pacific cyclone season officially begins.[1][A 4][A 5][A 6]
November 24
  • 07:15 UTC, (19:15 FST) – TCWC Nadi initiates advisories on a tropical depression, that has developed to the northwest of the Fijian dependency of Rotuma.[11]
  • 12:00 UTC, (0000 FST, November 25) – The JTWC designates the tropical depression to the northwest of Rotuma, as Tropical Cyclone 03P with 1-minute sustained wind speeds equivalent to a tropical storm.[9]
  • 1910 UTC, (0710 FST, November 25) – TCWC Nadi reports that Tropical Depression 03P, has intensified into a category 1 tropical cyclone and names it Sina.[11]
November 25
  • 1800 UTC, (0600 FST, November 26) – TCWC Nadi reports that Tropical Cyclone Sina, has intensified into a category 2 tropical cyclone.[5]
November 26
  • 0000 UTC, (1200 FST) – TCWC Nadi reports that Tropical Cyclone Sina (03P) has become a category 3 severe tropical cyclone.[5]
  • 0000 UTC, (1200 FST) – The JTWC reports that Tropical Cyclone Sina, has become equivalent to a category 1 tropical cyclone on the SSHWS.[12]
  • 0600 UTC, (1800 FST) – The JTWC reports that Tropical Cyclone Sina has intensified further and has become a category 2 hurricane on the SSHWS.[12]
Sina formed in the upper center of the map and generally moved to the south. The storm then curved to the east and became extratropical.
Track map of Severe Tropical Cyclone Sina
  • 1200 UTC, (0000 FST, November 27) – The JTWC reports that Tropical Cyclone Sina has intensified further and become equivalent to a category 3 tropical cyclone on the SSHWS.[12]
  • 1800 UTC, (0600 FST, November 27) – TCWC Nadi reports that Severe Tropical Cyclone Sina, has reached its peak intensity with 10-minute sustained winds of 140 km/h (85 mph).[11]
  • 1800 UTC, (0600 FST, November 27) – The JTWC reports that Tropical Cyclone Sina has intensified further and become equivalent to a category 4 hurricane on the SSHWS.[12]
November 27
  • 00:00 UTC, (12:00 FST) – The JTWC reports that Tropical Cyclone Sina has reached its peak intensity, with 1-minute sustained wind speeds of 230 km/h (145 mph).[12]
November 28
  • 00:00 UTC, (12:00 FST) – The JTWC issues its final advisory on Tropical Cyclone Sina and transfers the warning responsibility to the NWOC, as the system weakens and becomes equivalent to a category 3 tropical cyclone on the SSHWS.[9][12]
  • 12:00 UTC, (00:00 FST, November 29) – The NWOC issues its first advisory on Tropical Cyclone Sina.[9]
  • 18:00 UTC, (06:00 FST, November 29) – The NWOC reports that Tropical Cyclone Sina has weakened and become equivalent to a category 2 tropical cyclone on the SSHWS.[12]
November 29
  • 00:00 UTC, (12:00 FST) – TCWC Nadi reports that Severe Tropical Cyclone Sina, has weakened into a category 2 tropical cyclone.[5]
  • 06:00 UTC, (18:00 FST) – The NWOC reports that Tropical Cyclone Sina has weakened and become equivalent to a category 1 tropical cyclone on the SSHWS.[12]
  • 12:00 UTC, (00:00 FST, November 30) – The NWOC reports that Tropical Cyclone Sina (03P) has degenerated, into an extratropical cyclone and issues its final warning.[12]
November 30
  • 19:15 UTC, (07:15 FST, December 1) – TCWC Nadi issues its final advisory on Tropical Cyclone Sina, and passes the primary warning responsibility for the system to TCWC Wellington, as the system moves below 25°S.[11]

December

Joy formed in the upper left of the map and headed generally to the west. The storm then curved to the southwest and then to the southeast before curving southwest again and dissipating.
Track map of Severe Tropical Cyclone Joy (06P)
December 1
  • 0000 UTC (1200 FST) - TCWC Wellington reports that Tropical Cyclone Sina, has degenerated into an extratropical cyclone.[11]
December 4
  • 1800 UTC (0600 FST, December 5) – The extratropical remnants of Tropical Cyclone Sina are last noted by TCWC Wellington, as they are absorbed by a trough of low pressure.[2][5]
December 15
  • 1800 UTC, (0600 FST December 16) – The JTWC reports that Tropical Depression 06P has formed 535 km (330 mi) southeast of Honiara in the Solomon Islands.[13]
December 17
  • 0000 UTC, (1200 FST) – TCWC Nadi designates Tropical Depression 06P as a tropical depression.[5]
  • 1200 UTC, (0000 FST December 18) –TCWC Nadi and the JTWC report that Tropical Depression 06P has moved into the Australian region, where it is later named as Joy.[5][13]

January and February

  • There were no tropical disturbances reported within the South Pacific Ocean during January and February 1991.

March

March 15
  • 1800 UTC, (0600 FST March 16) – Tropical Depression 16P moves into the South Pacific from the Australian region.[8]
March 21
  • 0000 UTC, (1200 FST) – The JTWC reports that Tropical Depression 16P has dissipated.[8]

April

April 30
  • 1200 UTC, (0000 FST, May 1) – The 1990–91 South Pacific cyclone season officially ends.[1]

May

Lisa formed in the upper center of the map and headed generally to the southeast before dissipating.
Track map of Tropical Cyclone Lisa (21P)
May 11
  • 1200 UTC, (0000 FST, May 12) – TCWC Nadi reports that Tropical Cyclone Lisa (21P) has moved into the South Pacific from the Australian region, while at its peak intensity as a category 2 tropical cyclone with 10-minute sustained wind speeds of 110 km/h (70 mph).[5][14]
May 12
  • 1200 UTC, (12:00 FST), May 13) – TCWC Nadi issues its final advisory on Tropical Cyclone Lisa as it weakens into a depression.[14]
  • 1200 UTC, (00:00 FST, May 13) – The JTWC reports that Tropical Storm Lisa (21P) has weakened into a tropical depression.[15]
  • 1800 UTC, (0600 FST, May 13) – Depression Lisa (21P) passes over Anatom Island, Vanuatu.[2]
  • 1800 UTC, (06:00 FST, May 13) – TCWC Nadi reports that Depression Lisa (21P) has weakened into an extratropical cyclone.[2]
May 19
  • 0000 UTC, (1200 FST) – The extratropical remnants of Tropical Cyclone Lisa are last noted by TCWC Wellington as they dissipate.[2][5]

Notes

  1. ^ An average season has nine tropical cyclones, about half of which become severe tropical cyclones.
  2. ^ TCWC Nadi warned on systems in the South Pacific, which is located from the equator to 25°S and from 160°E to 120°W. TCWC Wellington warns on systems from 25°S to 40°S and from 160°E to 120°W
  3. miles, or kilometers), following the convention used in the Fiji Meteorological Service's operational products
    for each storm. All other units are rounded to the nearest digit.
  4. ^ UTC stands for Coordinated Universal Time.
  5. ^ FST stands for Fiji Standard Time, which is equivalent to UTC+12.
  6. miles, or kilometers), following the convention used in the Fiji Meteorological Service's operational products
    for each storm. All other units are rounded to the nearest digit.

References

  1. ^ a b c d e RA V Tropical Cyclone Committee. "Tropical Cyclone Operational Plan for the South Pacific and South-East Indian Ocean" (PDF) (2012 ed.). World Meteorological Organization. Archived from the original (PDF) on May 12, 2013. Retrieved June 16, 2010.
  2. ^ a b c d e f g h i j k l Bannister, Anthony J; Smith, K. J (December 4, 1993). "The South Pacific and Southeast Indian Ocean Tropical Cyclone Season 1990–1991" (PDF). Australian Meteorological Magazine. 42 (4). Australian Bureau of Meteorology: 111–121. Retrieved June 16, 2010.
  3. ^ . Retrieved May 15, 2011.
  4. ^ Ward, Graham F.A (March 1, 1995). "Prediction of tropical cyclone formation in terms of sea-surface temperatures vorticity and vertical windshear" (PDF). Australian Meteorological Magazine. 44. Australian Bureau of Meteorology. Retrieved June 16, 2010.
  5. ^ a b c d e f g h i j k MetService (May 22, 2009). "TCWC Wellington Best Track Data 1967–2006". International Best Track Archive for Climate Stewardship.[permanent dead link]
  6. ISSN 1321-4233. Archived from the original
    (PDF) on April 20, 2014. Retrieved August 19, 2013.
  7. ^ Joint Typhoon Warning Center. "Tropical Depression 15P best track analysis". United States Navy, United States Air Force. Archived from the original on October 4, 2013. Retrieved August 19, 2013.
  8. ^ a b c d Joint Typhoon Warning Center. "Tropical Depression 16P best track analysis". United States Navy, United States Air Force. Archived from the original on October 4, 2013. Retrieved August 19, 2013.
  9. ^ a b c d Joint Typhoon Warning Center; Naval Western Oceanography Center (1992). 6. Tropical Cyclone Warning Verification Statistics: Southern Hemisphere (PDF) (1991 Annual Tropical Cyclone Report). United States Navy, United States Airforce. pp. 213–220. Archived from the original (PDF) on December 6, 2013. Retrieved August 19, 2013.
  10. ^ "The Kingdom of Tonga's Initial National Communication In response to its commitments under the United Nations Framework Convention on Climate Change" (PDF). The Government of Tonga. July 21, 2005. pp. 12–13. Archived from the original (PDF) on March 31, 2012. Retrieved July 7, 2011.
  11. ^ a b c d e Prasad, Rajendra; Nadi Tropical Cyclone Warning Center (July 3, 1992). Tropical Cyclone Sina, November 24 - 30, 1990 (PDF) (Tropical Cyclone Report 90/6). Fiji Meteorological Service. Archived from the original (PDF) on September 21, 2013. Retrieved September 20, 2013.
  12. ^ a b c d e f g h i "Tropical Cyclone Sina (03P) Best Track Analysis". Joint Typhoon Warning Center. 1992. Retrieved 2010-06-16.
  13. ^ a b "Tropical Cyclone Joy (06P) Best Track Analysis". Joint Typhoon Warning Center. 1992. Retrieved 2010-06-16.
  14. ^ a b Pandaram, Sudha (July 3, 1992). Tropical Cyclone Lisa, May 7 - 13, 1991 (PDF) (Tropical Cyclone Report 91/1). Fiji Meteorological Service. Archived from the original (PDF) on October 2, 2013. Retrieved September 30, 2013.
  15. ^ "Tropical Cyclone Lisa (21P) Best Track Analysis". Joint Typhoon Warning Center. 1992. Archived from the original on 2012-10-10. Retrieved 2010-06-16.

External links