The Tropical Cyclone Season in the Southwest Pacific Region officially runs from 1 November to 30 April. Should tropical cyclogenesis become a possibility at some other time of the year, Tropical Cyclone Season procedures are activated. Definition: Tropical Cyclone A non-frontal low pressure system of synoptic scale developing over warm waters and having a definite organised wind circulation with a maximum 10-minute average wind speed of 34 knots (63 km per hour ie gale force) or greater near the centre. Tropical Cyclone Names RSMC Nadi will provide identification for tropical cyclones developing in its region of responsibility by allocating names in sequence from a list approved by the WMO RAV Tropical Cyclone Committee for the South Pacific and South-East Indian Ocean whenever there is reasonable evidence that a tropical cyclone has formed. The naming criteria adopted in the 8th Session of the WMO RAV Tropical Cyclone Committee for the Southwest Pacific meeting in Rarotonga, September 2000, was amended in the 9th session in Manila, Philippines in May 2002. It was further amended in the 10th Session in Brisbane, Australia in July 2004 to read: A non-frontal low pressure system of synoptic scale developing over warm waters, will be named whenever observations and/or Dvorak intensity analysis indicate the presence of gale force or stronger winds near the centre which are likely to continue. It includes systems that satisfy these criteria but have a non-classical appearance in the satellite imagery and/or form further south than the normal formation areas. Contingency Plan for Failures of RSMC Nadi If a tropical cyclone with storm or hurricane force winds is likely to threaten RSMC Nadi in the near future then RSMC Nadi should discuss the situation with the duty Lead Forecaster in Wellington RSMC. One of the objectives of any discussions will be to decide whether or not Nadi needs to send half-hourly check messages. If the situation does not warrant the sending of check messages then a review time must be set for another discussion with Wellington RSMC. Nadi needs to initiate on the GTS (30min interval). Communications failure, Check Bulletins advise RSMC Wellington, by telephone preferably, to be prepared to take over its TCWC functions. If no contact is established after 3 consecutive check bulletins, Wellington RSMC will assume TCWC responsibility. Figure 1 TC in RSMC Nadi Area since 2000/01 Season Figure 2 2014/15 Numbered Systems Figure 3 2014/15 TC Tracks Figure 4 2013/14 Post event best track Table 1 2013/14 Season TC Information
The Tropical Cyclone Season in the Southwest Pacific Region officially runs from 1 November to 30 April. Should tropical cyclogenesis become a possibility at some other time of the year, Tropical Cyclone Season procedures are activated. Definition: Tropical Cyclone A non-frontal low pressure system of synoptic scale developing over warm waters and having a definite organised wind circulation with a maximum 10-minute average wind speed of 34 knots (63 km per hour ie gale force) or greater near the centre. Tropical Cyclone Names RSMC Nadi will provide identification for tropical cyclones developing in its region of responsibility by allocating names in sequence from a list approved by the WMO RAV Tropical Cyclone Committee for the South Pacific and South-East Indian Ocean whenever there is reasonable evidence that a tropical cyclone has formed. The naming criteria adopted in the 8th Session of the WMO RAV Tropical Cyclone Committee for the Southwest Pacific meeting in Rarotonga, September 2000, was amended in the 9th session in Manila, Philippines in May 2002. It was further amended in the 10th Session in Brisbane, Australia in July 2004 to read: A non-frontal low pressure system of synoptic scale developing over warm waters, will be named whenever observations and/or Dvorak intensity analysis indicate the presence of gale force or stronger winds near the centre which are likely to continue. It includes systems that satisfy these criteria but have a non-classical appearance in the satellite imagery and/or form further south than the normal formation areas. Contingency Plan for Failures of RSMC Nadi If a tropical cyclone with storm or hurricane force winds is likely to threaten RSMC Nadi in the near future then RSMC Nadi should discuss the situation with the duty Lead Forecaster in Wellington RSMC. One of the objectives of any discussions will be to decide whether or not Nadi needs to send half-hourly check messages. If the situation does not warrant the sending of check messages then a review time must be set for another discussion with Wellington RSMC. Nadi needs to initiate Check Bulletins on the GTS (30min interval). Communications failure, advise RSMC Wellington, by telephone preferably, to be prepared to take over its TCWC functions. If no contact is established after 3 consecutive check bulletins, Wellington RSMC will assume TCWC responsibility. Figure 1 TC in RSMC Nadi Area since 2000/01 Season Figure 2 2014/15 Numbered Systems Figure 3 2014/15 TC Tracks Figure 4 2013/14 Post event best track Table 1 2013/14 Season TC Information
Doc4.2-3_RSMC_Nadi_report.docx