Cyclone Arthur (2007)
| Category 2 cyclone ( Australian scale ) | |||
|---|---|---|---|
| Category 1 Tropical Cyclone ( SSHWS ) | |||
 |
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| Emergence | January 21, 2007 | ||
| resolution | January 27, 2007 | ||
|
Peak wind speed |
|
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| Lowest air pressure | 975 hPa ( mbar ) | ||
| dead | None reported | ||
| Property damage | Unknown | ||
|
Affected areas |
Cook Islands and French Polynesia | ||
| Season overview: South Pacific cyclone season 2006–2007 |
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Cyclone Arthur (name of RSMC Nadi: 08F , name of JTWC 09P ) was the eighth tropical low pressure system and the fourth tropical cyclone of the South Pacific cyclone season 2006-2007 . It formed from a tropical depression on January 25th and intensified into a strong Category 2 cyclone on the Australian scale used by the Regional Specialized Meteorological Center in Nadi , Fiji . The Joint Typhoon Warning Center rated the storm as a Category 1 light cyclone on the Saffir-Simpson Hurricane Wind Scale . Shortly after reaching peak intensity, the cyclone began to weaken as the conditions around the storm center became unfavorable. The storm moved rapidly in an east-southeast direction and the transition to an extra-tropical cyclone began. After the storm turned to the southeast, the circulation center was completely exposed due to strong wind shear . Late on January 26th, Arthur was able to intensify again for a short time, but on January 27th became extra-tropical. The tropical cyclone affected several smaller islands during its existence. The residents of French Polynesia felt the storm most clearly .
Storm course
On January 21, the Regional Specialized Meteorological Center in Nadi identified the 08F tropical depression that formed about 435 kilometers west-northwest of the island of Savai'i in Samoa . The depression moved slowly east-southeast over a few days, with the structure of the system and its intensity fluctuating due to the alternation of day and night and due to strong wind shear . At around 5:00 p.m. UTC on January 22, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert . The system developed an extensive band of rain north of the circulation and deep convection formed around the center of circulation. The Depression moved to an area where wind shear was weak to moderate. Storm warnings were triggered during the day for the northeast quadrant of the system. The 08F system continued its development when an anticyclone formed above the low pressure area. A subtropical trough north of the low pressure system steered it eastward.
Early on January 24th, the system organized itself increasingly better and intensified into a cyclone at 6:00 a.m. UTC. The RSMC Nadi named Arthur . The cyclone began to intensify rapidly and the structure of the system improved significantly. A pronounced deep convection built up around the center, with a strong discharge to the north. A few hours after 08F intensified into Cyclone Arthur, the JTWC issued its first warning about the system, which was rapidly moving east-south-east. The rapid forward movement is due to the influences of a subtropical high pressure ridge in the north and a trough in the south of the system. Later in the day, an eye began to form and the storm intensified into a Category 2 cyclone on the intensity scale of the Australian Bureau of Meteorology . According to the JTWC's assessment, the cyclone reached its greatest strength at 6:00 p.m. UTC that day with sustained one-minute winds of 120 km / h, which corresponds to a light category 1 cyclone on the Saffir-Simpson hurricane wind scale . According to the criteria of the RSMC in Nadi, the storm reached its greatest strength early on January 25 with ten-minute winds of 110 km / h and a minimum air pressure of 975 hPa . The center was at that time 635 kilometers north-northwest of Rarotonga . A short time later, the transition to an extra-tropical cyclone began, which very quickly lost its organization, as the center was exposed to strong wind shear.
The storm also began to connect to a low pressure front system associated with the remains of Cyclone Zita . The strong wind shear partially exposed the circulation center and convection was only preserved in the southeastern quadrant. In addition to the wind shear, the penetrating dry air also weakened the storm. The storm continued to move rapidly and began turning southeast, along a front . Early on January 26th, the JTWC issued its final warning about the system that it had lost most of its tropical properties. Shortly thereafter, Arthur re-intensified and at 21:00 UTC the JTWC resumed issuing warnings. The brief resurgence of the cyclone was the result of a weakness in the weather front, which enabled the convection to re-form around the storm center. At about the same time Arthur left the observation area of the RSMC in Nadi and entered the warning area of the Tropical Cyclone Warning Center in Wellington . The storm completed the transition to an extra-tropical area on January 27, so the final warning was given to the system.
Preparations and implications
On January 21, a storm warning was issued for Tutuila , American Samoa , Manuʻa and Swains Island as the Tropical Depression was approaching these islands. The warning was based on constant wind speeds of 55 km / h and gusts of up to 75 km / h. A warning for small craft was issued for the Cook Islands , as the high waves could extend there. These warnings were lifted late on January 23 because the system was no longer endangering the islands. On January 24, the Austral Islands set the orange alert, and Rurutu and Tubuai were later raised to red as the storm approached. Arthur's damage in the Cook Islands when the storm passed between the group's southern islands and western French Polynesia was minor and consisted mainly of coastal erosion . Heavy rainfall created multiple landslides in French Polynesia, damaging some homes in Tahiti and Moorea . The wave height around the islands reached 1.5 to 2 meters. Continuous wind speeds of up to 85 km / h ( 10 minutes ) and gusts of up to 115 km / h were recorded in Tubuai . Some houses were damaged and several roads on the island were blocked by fallen trees. The effects of the storm surge on the coast were minor.
designation
When Tropical Depression 08F was promoted to tropical cyclone and given the name Arthur , it was the third time that name had been used for a storm in the southern Pacific Ocean. Previously the name was used during the South Pacific cyclone seasons of 1981 and 1991. The name has also been used five times for storms in the Atlantic Ocean - 1984 , 1990 , 1996 , 2002 , and 2008 . Since the damage caused by Cyclone Arthur in 2007 was minor, the name was not deleted and remained on Name List B for the South Pacific Ocean .
Individual evidence
- ↑ a b c d e f g h i RA V Tropical Cyclone Committee: Final Report for the South Pacific and South-East Indian Ocean ( English , PDF ; 1.2 MB) World Meteorological Organization . July 17, 2008. Retrieved February 27, 2009.
- ↑ a b c Gary Padgett: Monthly Tropical Weather Summary for January 2007 ( English ) Typhoon 2000. 28 March 2007. Accessed on 27 February, 2009.
- ↑ TCWC Advisories for January 22, 2007 at 12Z ( English ) Unisys Corporation . January 22, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ↑ TCWC Advisories for January 22, 2007 at 18Z ( English ) Unisys Corporation. January 22, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ↑ TCWC Advisories for January 24, 2007 at 12Z ( English ) Unisys Corporation. January 24, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ↑ TCWC Advisories for January 24, 2007 at 18Z ( English ) Unisys Corporation. January 24, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ↑ JTWC Best Track for Tropical Cyclone 09P (Arthur) ( English ) Joint Typhoon Warning Center . 2008. Accessed on February 21, 2009. ( Page no longer available , search in web archives ) Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.
- ↑ a b TCWC Advisories for January 25, 2007 at 00Z ( English ) Unisys Corporation. January 25, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ↑ TCWC Advisories for January 25, 2007 at 06Z ( English ) Unisys Corporation. January 25, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ↑ TCWC Advisories for January 25, 2007 at 12Z ( English ) Unisys Corporation. January 25, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ↑ TCWC Advisories for January 26, 2007 at 00Z ( English ) Unisys Corporation. January 26, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ↑ TCWC Advisories for January 26, 2007 at 06Z ( English ) Unisys Corporation. January 26, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ↑ TCWC Advisories for January 27, 2007 at 00Z ( English ) Unisys Corporation. January 27, 2007. Archived from the original on October 29, 2007. Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ↑ TCWC Advisories for January 22, 2007 at 00Z ( English ) Unisys Corporation. January 22, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ^ A b Kevin Vang: Cyclone Arthur passing between Southern Cooks and Western French Polynesia ( English ) Asia-Pacific Disaster Alerts. January 26, 2007. Archived from the original on August 30, 2007. Retrieved on February 21, 2009.
- ↑ TCWC Advisories for January 23, 2007 at 18Z ( English ) Unisys Corporation. January 23, 2007. Archived from the original on October 29, 2007. Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved February 21, 2009.
- ^ A b French Polynesia: Review of the 2006/2007 and 2007/2008 Tropical Cyclone Seasons ( English , DOC; 1.7 MB) World Meteorological Organization. July 17, 2008. Retrieved February 21, 2009.
- ↑ Kevin Vang: Cyclone Arthur forms near Southern Cooks as Cyclone Zita exits French Polynesia ( English ) Asia-Pacific Disaster Alerts. January 25, 2007. Archived from the original on August 30, 2007. Retrieved on February 21, 2009.
- ↑ Ashmita Gosai, Stuart Burgess: The Island Climate Update ( English , PDF ; 906 kB) National Institute of Water & Atmospheric Research. June 2007. Retrieved February 21, 2009.
- ^ Tropical Cyclone Information for the Southern Hemisphere ( English ) Bureau of Meteorology . 2009. Retrieved February 21, 2009.
- ^ Tropical Cyclone Information for the Southern Hemisphere . Bureau of Meteorology. 2009. Retrieved February 21, 2009.
- ↑ National Hurricane Center : Atlantic Best Tracks, 1851 to 2007 ( English , TXT) National Oceanic and Atmospheric Administration . 2008. Retrieved February 21, 2009.
- ↑ Eric S. Blake: Tropical Storm Arthur (2008) Tropical Cyclone Report ( English , PDF ; 494 kB) National Hurricane Center. July 28, 2008. Retrieved February 21, 2009.
- ^ Tropical Cyclone Naming ( English ) World Meteorological Organization. 2008. Retrieved February 21, 2009.
