Tropical Cyclone Propagation
Abstract
This paper discusses tropical cyclone (TC) propagation which is defined as the difference in TC motion from outer radius deep layer steering flow movement. Previous analyses have shown that the 5-7 deg radius 850-300 mb layer mean flow give a reasonably good representation of the tropical cyclone's steering environment. The author has made many new TC motion related raw-insonde composite analyses for northwest Pacific, Atlantic, and the Australia-South Pacific tropical cyclones. Composite data have been stratified by three motion direction categories (west, north, and northeast) and three speed (slow, average, and fast) categories. Stratification has also been made for stationary or nearly stationary cyclones in each basin. Special software programs have been developed to calculate the surrounding cyclone deep layer wind components parallel and perpendicular to the fixed and moving cyclone center. A primary purpose of these analyses has been to quantitatively document the relationship between the tropical cyclone's center motion and its surrounding deep layer (850-300 mb) winds at various radii.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1991
- Accession Number
- ADA239058
Entities
People
- W. M. Gray
Organizations
- Colorado State University