Evaluation of Seven Stability Indices as Predictors of Convection in South Texas

摘要

Stability indices from four upper air stations are compared as predictors for the occurrence of convection (VIP 3 or greater) reported by three radar sites in South Texas for the months of June through October, 1984. The E11 Index (now called E1 by Stone, 1984b, 1985, 1986) was found to be slightly better in predicting the occurrence of convection and showed significant potential in segregating potentially severe events from the more benign cases. Thresholds (60% confidence levels) are presented for the individual indices for the occurrence of convection which can be of use to the operational meteorologist.