tcwc wellington activity report presented to the 4th tropical cyclone rsmcs technical coordination...
TRANSCRIPT
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TCWC WellingtonActivity Report
Presented to the 4th Tropical Cyclone RSMCs Technical Coordination Meeting
by Rod Stainer
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New Zealand’s Responsibities
• Wellington is an RSMC with geographical specialisation, but is designated as a tropical cyclone warning centre for the subtropical region of the South Pacific south of 25 south.
• Wellington provides SIGMETs for a portion of the Pacific Ocean through to 5 south - FIR modified in August 2002
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New Zealand’s TCWC AOR
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Auckland Oceanic FIR
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Contingency Arrangements
• RSMC Wellington will takeover as TCWC for Nadi’s area of responsibility in the event of an outgage at RSMC Nadi.
• Last takeover due to storm damage occurred in 1984
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Nadi Backup Procedures (1)
• When there is a direct threat posed by a tropical cyclone Nadi:– Advises Wellington that it will initiate
Check Bulletins on the GTS at 30 min intervals:This is Check Bulletin Number One issued by RSMC Nadi at {time, date}
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Nadi Backup Procedures (2)
• In the event of a Check Bulletin failure, Wellington attempts to ascertain the operational status of Nadi;
• If three Check Bulletins are missed and no contact has been established with Nadi then Wellington takes over Nadi’s TCWC responsibilities.
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Services Provided (1)
• First Priority (must be issued)– TC Alerts and Warnings for Island groups– Marine Warnings– SIGMETs– Special Advisory (for Vanuata)
• Second Priority (all efforts made)– Tropical Disturbance Advisory– High Seas Bulletins– 24 Hour TAFs
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Services Provided (2)
• Third Priority (only if resources allow)– Aviation Area forecasts– Minor TAFs
• Fourth Priority (only if resources allow)– Routine public weather bulletins
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Preparation for TC Season
• An annual 1 day workshop for forecasters is held generally in November, covering:– Back-up and contingency arrangements;– monitoring procedures;– case studies from the previous season;– forecasting techniques.
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Analysis
• SNOWIE, interactive forecaster chart analysis tool
• Heavy reliance on subjective satellite imagery techniques to provide “ball park” wind speeds
• Dvorak not used systematically
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CYTRACK
• Interactive tool for monitoring tropical cyclones;
• Operational, forecast and model cyclone positions - entered manually
• Provides an extrapolated track;
• Database for historical information
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Communications with Governments (1)
• Ministry of Foreign Affairs and Trade– Contribute to pre-season briefing to
coordinate disaster relief planning, with participants from the Ministries of Defence, and Civil Defence & Emergency Management, officials from the French Embassy and Australian High Commission.
– MFAT immediately advise of a development of a new TC, forwarded all warnings
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Communications with Governments (2)
• FRANZ, high level inter-governmental coordination committee concerning Pacific disaster relief that recommends policy to governments
• Steve Ready from MetService will be participating at the next FRANZ meeting in Wellington on 2 December
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Communications with Governments (3)
• Ministry of Civil Defence and Emergency Management are immediately advised whenever a cyclone enters the area south of 20 south between longitudes 160 east and 170 west
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Communications with Governments (4)
• Radio New Zealand International – Provides SW services to the Pacific;– Immediately informed by forecasts of a
development of a new TC;– All warnings issued by Nadi are broadcast
on RNZI’s short wave service;– If a cyclone is posing a threat to an Island
Group then RNZI will broadcast warnings around the clock.
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Other Activities• Annually exchange best track information with Brisbane
and Nadi• Tropical cyclone summaries for the Wellington area
forwarded to WMO for Annual Tropical Cyclone Summary• Steve Ready presented a workshop to Fiji Met Service
forecaster in June 2001 on “T.C. Monitoring and Tracking”;
• Steve Ready contributed to the WMO/BOM sponsored Southern Hemisphere Course on Tropical Cyclones held in Melbourne in September 2002