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1989 Annual Tropical Cyclone Report

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The Annual Tropical Cyclone Report is prepared by the staff of the Joint Typhoon Warning Center (JTWC). a combined Air Force/Navy organization operating under the command of the Commanding Officer, U.S. Naval Oceanography Command Center/Joint Typhoon Warning Center, Guam. JTWC was established 1 May 1959 when USCINCPAC directed USCINCPACFLT to provide a single tropical cyclone warning center for the western North Pacific region. The operations of JTWC are guided by CINCPACINST 3140.lT.

The mission of the Joint Typhoon Warning Center is multi-faceted and includes:

  1. Continuous monitoring of all tropical weather activity in the Northern and Southern Hemispheres. from 180 degrees longitude westward to the east coast of Africa. and the prompt issuance of appropriate advisories and alerts when tropical cyclone development is anticipated.

  2. Issuing warnings on all significant tropical cyclones in the above area of responsibility.

  3. Determination of requirements for tropical cyclone reconnaissance and assignment of appropriate priorities.

  4. Post-storm analysis of all significant tropical cyclones occurring within the western North Pacific and North Indian Oceans, which includes an in-depth analysis of tropical cyclones of note and all typhoons.

  5. Cooperation with the Naval Oceanographic and Atmopheric Research Laboratory (NOARL). Monterey, California. on the operational evaluation of tropical cyclone models and forecast aids. and the development of new techniques to support operational forecast scenarios.
    Satellite imagery used throughout this report represents data obtained by the DMSP network. The personnel of Detachment 1. lWW. collocated with rrwc at Nimitz Hill, Guam. coordinate the satellite acquisitions and tropical cyclone reconnaissance with the following units:

Det 4. 20WS, Hickam AFB. Hawaii

Det 5. 20WS. Clark AB, Republic of the Philippines Det 8. 20WS. Kadena AB. Japan

Det 15, 30WS, Osan AB, Korea

Air Force Global Weather Central. Offutt AFB, Nebraska

In addition. the Naval Oceanography Command Detachment, Diego Garcia. and Defense Meteorological Satellite Program (DMSP) equipped U.S. Navy ships have been instrumental in providing vital fixes of tropical cyclones in the Indian Ocean from satellite data.

Should JTWC become incapacitated. the Alternate Joint Typhoon Warning Center (AJTWC) located at the U.S. Naval Western Oceanography Center. Pearl Harbor, Hawaii, assumes warning responsibilities. Assistance in determining satellite reconnaissance requirements. and in obtaining the resultant data. is provided by the PACAF Weather Support Unit. Hickam AFB, Hawaii.

Changes in this year's publication include: a new list of tropical cyclone names was implemented after Typhoon Wayne (25W); old Annex A now appears wider the heading Tropical Cyclone Warning Statistics, Track and Fix Data; the Satellite Reconnaissance section was expanded to include technique development efforts and future developments; and the numbering of the sections was modified to make indexing the material easier.

Special thanks to: Lieutenant Colonel Daniel J. McMorrow for his significant contributions and support; the men and women of the 27th Communications Squadron, Operating Location Charlie and the Operations and Equipment Support departments of the Naval Oceanography Command Center, Guam for their continuing support by providing high quality real-time satellite imagery; Marine Corps Air Station. Futenma, Japan for sharing their satellite imagery of tropical cyclones; the Pacific Fleet Audio-Visual Center, Guam for their assistance in the reproduction of satellite data for this report; to the Navy Publications and Printing Service Branch Office. Guam; Dr. Bob Abbey and the Office of Naval Research for their technical support to this publication and support to the University of Hawaii for the Post Doctorate Fellow at ITWC; Dr. Mark Lander for his training efforts and suggestions; the Australian Meteorological Service for the coastal radar reports on tropical cyclones via the AFI'N to JTWC; National Weather Service Pacific Region for their able assistance installing the AMOS equipment at Ujae and Enewetak., and AFI'N hardware at JTW C; and the Republic of the Marshall Islands for endorsing the AMOS installations at Ujae and Enewetak; Mr John Brown and Mr. David Saltzberger of the Naval Oceanographic Office for their efforts regarding buoys and the Local User's Terminal data.

Note: Appendix A contains definitions, Appendix B names of tropical cyclones, Appendix C references and Appendix D information on how to obtain past issues of the Annual Tropical Cyclone Report (titled Annual Typhoon Report prior to 1980).