WMO / ESCAP
Panel on Tropical Cyclones

for the Bay of Bengal & the Arabian Sea

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Meteorological
Organization

United Nations
Economic and Social Commission
for Asia and Pacific


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Operational Plan

Tropical Cyclone Operational Plan

The main objective of the WMO/ESCAP Panel on Tropical Cyclones (PTC) is to promote measures to improve tropical cyclone warning system in the Bay of Bengal and the Arabian Sea. As part of this endeavor, the PTC at its twelfth session (Karachi, Pakistan, 12-18 March 1985) adopted a comprehensive Tropical Cyclone Operational Plan for this region. The basic purpose of the operational plan is to facilitate the most effective tropical cyclone warning system for the region with existing facilities. In doing so, the plan defines the sharing of responsibilities among PTC Member countries for the various segments of the system and records the coordination and cooperation achieved. It contains an explicit formulation of the procedures adopted in the Bay of Bengal and Arabian Sea region for the preparation, distribution and exchange of information and warnings pertaining to tropical cyclones. The plan records the agreed arrangements for standardization of operational procedures, efficient exchange of various data related to tropical cyclone warnings, archival of data and cyclone advisories and issue of tropical weather outlooks for the benefit of the region from a central location having the required facilities for this purpose, that is the Regional Specialized Meteorological Centre-tropical cyclones, New Delhi, India as agreed upon by the PTC.

 

There are six Regional Specialized Meteorological Centres in the world for the issuance of tropical weather outlooks and distribution of tropical cyclone advisories and warnings as agreed by consensus at the WMO as part of the World Weather Watch, for the benefit of their respective regions as per agreed operational procedures. The Regional Specialized Meteorological Centre (RSMC)-tropical cyclones, New Delhi is responsible for monitoring and prediction of tropical cyclones over the north Indian Ocean and for issuance of advisories for the guidance of National Meteorological Services (NMSs) of the PTC region as per agreed operational procedure and mentioned in the Tropical Cyclone Operational Plan for the Bay of Bengal and Arabian Sea. However, the main responsibility for the issuance of tropical cyclone advisories and warnings at national level lies with the NMS of that country.

 

Experience has shown that it is of great advantage to have an explicit statement of the regional procedures to be followed in the event of a cyclone, and Tropical Cyclone Operational Plan is designed to serve as a valuable source of information always available for reference by the forecaster and other users, particularly under operational conditions. Relevant information, which is not subject to regional agreement, is given in the annexes to the plan. A Coordinated Technical Plan aiming at the development and improvement of the cyclone warning system of the region has been drawn up by the PTC. Implementation of some items under the technical plan would lead to strengthening of the operational plan.

 

The Tropical Cyclone Operational Plan is evolutionary in nature. The text of the plan is subject to revision and updating from time to time by the PTC and the information given in the annexes to the plan is to be kept up-to-date by the PTC Member country concerned.

 

The latest Edition of the Tropical Cyclone Operational Plan for the Bay of Bengal and Arabian Sea (the PTC region) is available on PTC website. (Please see in the Downloads)

 

The Operational Plans for various other regions and ocean basins are available on the WMO website at the following link: http://www.wmo.int/pages/prog/www/tcp/operational-plans.html


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