Thunderstorm-scale variations of echoes associated with left-turn tornado familiesThe origin of tornadoes is studied on the basis of changing radar echo shapes and tornado location relative to the echoes. Three types of tornadoes appear to be associated with different hook echo configurations. No-turn or right-turn tornadoes are linked to a steady hook which does not change shape or orientation. Left-turn tornado families are generated in cases where the hook is unsteady and changes orientation at each successive tornado birth. Finally, left-turn tornado families may also be formed when the hook undergoes no orientation change and the tornadoes move along the rear of the hook. The correlation between a thunderstorm-scale cycle and periodic tornado production is also discussed.
Document ID
19780056245
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Forbes, G. S. (Chicago, University Chicago, Ill., United States)