Date of Award
Master of Science
Tornado detection has improved in recent years due, in part, to the deployment of dual-polarization radar technology. Depsite these improvements, false alarm rates (FAR) for tornado warnings remain high over Memphis, TN County Warning Area. The purpose of this research was to use a suite of radar products and storm environmental parameters in an effort to decrease tornado warning FAR over the Mid-South. The Memphis National Weather Service Forecast Office County Warning Area (CWA) serves as the study area for this reseach. Previous research has shown that storm mode and environment can imact FAR. Therefore, by combining radar products and storm environment, tornadic and non-tornadic events could be distinguished and the FAR could be reduced. Results suggest that some combination of rotational velocity and a modifed energy-helicity index that places more emphasis on shear and is sensitive to low convectively available potential energy (CAPE) values might aid in reducing tornado warning FAR.
dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.
Bradley, Preston Jewel, "Reducing Tornado Warning False Alarm Rates across the National Weather Service Memphis County Warning Area" (2020). Electronic Theses and Dissertations. 2128.