Accession Number : ADA301618

Title :   Tropical Cyclone Report, 1994,

Descriptive Note : Annual rept. Jan-Dec 94,

Corporate Author : NAVAL OCEANOGRAPHY COMMAND CENTER/JOINT TYPHOON WARNING CENTER FPO SAN FRANCIS CO 96630

PDF Url : ADA301618

Report Date : 1994

Pagination or Media Count : 350

Abstract : 1994 WAS NOTABLE FOR THE Joint Typhoon Warning Center (JTWC) in many respects. We witnessed the two longest-lived tropical cyclones on record; Typhoon John, which lasted for 30 days over the North Pacific Ocean and Tropical Cyclone Rewa (05P) which lasted for 21 days in the southwestern Pacific Ocean. We also, for the first time in history, recorded the binary interaction between Typhoon Pat and Tropical Storm Ruth and through eventual merger. The Northwest Pacific (NWPAC) was especially active in 1994, with several long lived, slow-moving typhoons that dramatically increased the workload for the men and women of the JTWC. For the first time in our 36-year history, the JTWC issued more than 1000 warnings in NWPAC, on a total of 41 significant tropical cyclones. The DMSP Tropical Cyclone Reconnaissance Network (DMSP Network) logged over 5000 fixes during the year; also a record high. In spite of the very heavy workload, the JTWC continued to improve its forecast accuracy. Track forecast errors at 48- and 72-hours were the lowest ever, and intensity forecast errors were among the lowest in 20 years. Sixty warnings were issued on the five tropical cyclones which occurred in the North Indian Ocean during 1994, and a record total of 390 warnings on 30 tropical cyclones in the Southern Hemisphere, 27 of which were within JfWC's area of responsibility. JTWC forecast errors were better than the long-term averages for 19 years in the North Indian Ocean, and among the lowest ever for the 14 years in the Southern Hemisphere.

Descriptors :   *WEATHER FORECASTING, *WEATHER STATIONS, *TROPICAL CYCLONES, NETWORKS, INTENSITY, ACCURACY, LONG RANGE(TIME), LOW VELOCITY, ERRORS, STORMS, NORTH(DIRECTION), MEAN, PACIFIC OCEAN, SOUTHERN HEMISPHERE, WORKLOAD, RECONNAISSANCE, INDIAN OCEAN, TYPHOONS.

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE