Tropical Cyclone Service Level Specification
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Tropical Cyclone Service Level Specification Season 2020-2021 Severe Weather Environmental Prediction Services © Commonwealth of Australia 2020 This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced without prior written permission from the Bureau of Meteorology. Requests and inquiries concerning reproduction and rights should be addressed to the Communication Section, Bureau of Meteorology, GPO Box 1289, Melbourne 3001. Requests for reproduction of material from the Bureau website should be addressed to AMDISS, Bureau of Meteorology, at the same address. Published by the Bureau of Meteorology Tropical Cyclone Service Level Specification (SLS) Revision history Date Version Description Author 23/12/2020 v2.0 • 2020/21 release. Andrew Burton • Storm tide appendix updated by Andy Taylor 25/8/2020 v1.1 • PST change statement included in 2.1.1 Craig Earl-Spurr • Figure 2 replaced David Grant • Reworded 3.4 around post-tropical cyclones • SEWS description included in 3.7 • Briefing services added in 3.9 • Included update on landfall process in 5.2.2 • Addition of three Qld storm tide forecast locations • TCA section in 6.3 revised to align with ASH • TCWC naming convention change included in product examples • Changed the remarks section in the Ocean Wind Warning • Reference to ATCAG included in section 4 30/7/2019 v1.0 30 July 2019 Vikash Prasad • removed 41-knot rule Robyn Duell 6 Aug 2019 • Standard Operating Procedures (SOP) content removed 13 Aug 2019 • Table of Contents decided • Product Schedule created • Merged contents from the Qld Storm Tide Handbook 27 Aug 2019 • Replaced W, N and E Regions with Australian TCWC • Copied Product Samples from 2018-19 directives 23 September 2019 • Moved samples to appendix, reviewed category and naming sections. Included time zone and conversions 30 October 2019 • Dissemination and Communication and Adoption sections added i Tropical Cyclone Service Level Specification (SLS) Release history The latest version of this document is stored on the Bureau of Meteorology Community Services Group – Severe Weather Environmental Prediction Services – Tropical Cyclones SharePoint site (https://bom365.sharepoint.com/sites/TCWC/publicfiles/Forms/Default.aspx) Date Version Status Audience Approval 23 Dec 2020 2.0 Official All GM_EPS Review Status The Tropical Cyclone SLS is reviewed annually and amended, if necessary, before the start of the next cyclone season. Reviewer Date Reviewed Version Reviewed Evan Morgan 9 Dec 2020 2.0 Release Signatories Approval Name Signature Date Version 2.0 GM_EPS Jeff Perkins Signed 12/1/2021 Electronically ii Tropical Cyclone Service Level Specification (SLS) Table of Contents 1 Introduction .................................................................................................................... 1 1.1 Purpose ............................................................................................................. 1 1.2 Scope ................................................................................................................. 2 1.3 Authority ............................................................................................................. 2 1.4 Distribution ......................................................................................................... 2 2 International Tropical Cyclone services .......................................................................... 3 2.1 World Meteorological Organization Tropical Cyclone Programme ...................... 3 Region V Tropical Cyclone Committee ............................................................... 3 Region I Tropical Cyclone Committee ................................................................ 4 3 National Tropical Cyclone Services ............................................................................... 6 3.1 Tropical Cyclone Season ................................................................................... 6 3.2 Area of Responsibility ........................................................................................ 6 3.3 Tropical Cyclone Definition ................................................................................. 7 3.4 Extra-tropical and sub-tropical cyclones ............................................................. 7 3.5 Tropical Cyclone Naming Policy ......................................................................... 7 3.6 Tropical Cyclone Categories .............................................................................. 8 3.7 Standard Emergency Warning Signal (SEWS) ................................................... 8 3.8 Dissemination of products .................................................................................. 9 3.9 Briefing Services ................................................................................................ 9 3.10 Communication and adoption activities .............................................................. 9 3.11 Service Continuity .............................................................................................. 9 4 Quality Assurance and Performance ........................................................................... 10 4.1 Australian Tropical Cyclone Advisory Group .................................................... 10 4.2 Best Tracking ................................................................................................... 10 4.3 Performance Statistics and Reporting .............................................................. 10 4.4 Post Event Review Management ..................................................................... 10 4.5 Forecaster Training and Competency .............................................................. 11 5 National Tropical Cyclone Product Schedule ............................................................... 12 5.1 Routine Services .............................................................................................. 12 Australian Tropical Cyclone Seasonal Outlook ................................................. 12 Weekly Tropical Climate Note .......................................................................... 13 Tropical Cyclone Outlook ................................................................................. 14 5.2 Non-Routine Services ...................................................................................... 15 Tropical Cyclone Information Bulletin ............................................................... 15 Tropical Cyclone Advice ................................................................................... 16 Tropical Cyclone Forecast Track Map .............................................................. 18 Tropical Cyclone Technical Bulletin .................................................................. 20 Storm Tide Advice ............................................................................................ 21 CAP Tropical Cyclone Advice ........................................................................... 22 GML Track ....................................................................................................... 23 6 International Tropical Cyclone Product Schedule ......................................................... 24 6.1 Ocean Wind Warning ....................................................................................... 24 6.2 CREX Bulletin .................................................................................................. 25 6.3 Tropical Cyclone Advisory (Aviation) ................................................................ 26 6.4 Satellite Analysis Bulletin ................................................................................. 28 6.5 Special Advisory for the Solomon Islands......................................................... 30 6.6 Special Advisory for Timor-Leste ...................................................................... 32 iii Tropical Cyclone Service Level Specification (SLS) 7 Appendix 1: Storm Tide Advice Locations .................................................................... 33 7.1 Storm Tide Advice location list ......................................................................... 33 7.2 Storm Tide Advice location maps ..................................................................... 37 7.3 Interpretation of advice content ........................................................................ 44 Communication risks associated with vertical datums ...................................... 44 Forecaster mediation of numerical model data ................................................. 44 Importance of tidal range .................................................................................. 45 Tidal plane comparison graph .......................................................................... 45 Highlighted locations with mismatched tidal plane data .................................... 47 Highlighted locations with no standard tide table .............................................. 51 8 Appendix 2: Product Samples ...................................................................................... 53 8.1 Tropical Cyclone Outlook ................................................................................. 53 8.2 Tropical Cyclone Information Bulletin ............................................................... 54 8.3 Tropical Cyclone Advice ................................................................................... 55 8.4 Tropical Cyclone