27th Conference on Hurricanes and Tropical Meteorology


Vorcity-Based Detection of Tropical Cyclogenesis

Michelle M. Hite, COAPS/Florida State University, Tallahassee, FL; and M. A. Bourassa, P. Cunningham, J. J. O'Brien, and P. D. Reasor

Ocean wind vectors from the SeaWinds scatterometer on QuikSCAT and GOES imagery are used to develop an objective technique that will detect and monitor tropical disturbances associated with the early stages of tropical cyclogenesis in the Atlantic basin. The technique is based on identification of surface vorticity and wind speed signatures that exceed threshold magnitudes, with vorticity averaged over an appropriate spatial scale. The threshold values are determined from the precursors of 15 tropical cyclones during the 1999-2004 hurricane seasons using research-quality QuikSCAT data. Tropical disturbances are found for these cases within a range of 19 hours to 101 hours before classification as tropical cyclones by the NHC. The objective detection technique will be described and demonstrated.

extended abstract  Extended Abstract (1.4M)

wrf recording  Recorded presentation

Session 10B, Tropical Cyclogenesis II
Wednesday, 26 April 2006, 3:30 PM-5:30 PM, Regency Grand Ballroom

Previous paper  Next paper

Browse or search entire meeting

AMS Home Page