Near-surface vortex intensification through corner flow collapse

Journal of the Atmospheric Sciences

Volumn 64, Issue 7, 2007, Pages 2195-2209

  Lewellen, D C ^a   Lewellen, W S ^a  

^a WEST VIRGINIA UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

COMPUTER SIMULATION; LARGE EDDY SIMULATION; SWIRLING FLOW; UNSTEADY FLOW; VORTEX FLOW;

CORNER FLOW; FLOW COLLAPSE; NEAR-SURFACE INTENSIFICATION; TORNADO VARIABILITY; TORNADOGENESIS;

TORNADOES;

COMPUTER SIMULATION; LARGE EDDY SIMULATION; SWIRLING FLOW; TORNADOES; UNSTEADY FLOW; VORTEX FLOW;

LARGE EDDY SIMULATION; TORNADO; UNSTEADY FLOW; VORTEX FLOW;

EID: 34547780595     PISSN: 00224928     EISSN: None     Source Type: Journal    
DOI: 10.1175/JAS3966.1     Document Type: Article

References (17)

1. Davies-Jones, R., 2000: Can the hook echo instigate tornadogenesis barotropically? Preprints, 20th Conf. on Severe Local Storms, Orlando, FL, Amer. Meteor. Soc., 269-272.
2. Fiedler, B. H., 1994: The thermodynamic speed limit and its violation in axisymmetric numerical simulations of tornado-like vortices. Atmos.-Ocean, 32, 335-359.
3. Fiedler, B. H., 1997: Compressibility and windspeed limits in tornadoes. Atmos.-Ocean, 35, 93-107.
4. Lewellen, D. C., and W. S. Lewellen, 2002: Near-surface intensification during unsteady tornado evolution. Preprints, 21st Conf. on Severe Local Storms, San Antonio, TX, Amer. Meteor. Soc., CD-ROM, 12.8.
5. Lewellen, D. C., and W. S. Lewellen, 2007: Near-surface intensification of tornado vortices. J. Atmos. Sci., 64, 2176-2194.
6. Lewellen, D. C., W. S. Lewellen, and J. Xia, 2000a: The influence of a local swirl ratio on tornado intensification near the surface. J. Atmos. Sci., 57, 527-544.
7. Lewellen, D. C., W. S. Lewellen, and J. Xia, 2000b: Nonaxisymmetric, unsteady tornadic corner flows. Preprints, 20th Conf. on Severe Local Storms, Orlando, FL, Amer. Meteor. Soc., 265-268.
8. Lewellen, D. C., B. Gong, and W. S. Lewellen, 2004: Effects of debris on near-surface tornado dynamics. Preprints, 22d Conf. on Severe Local Storms, Hyannis, MA, Amer. Meteor. Soc., CD-ROM, 15.5.
9. Lewellen, W. S., D. C. Lewellen, and R. I. Sykes, 1997: Large-eddy simulation of a tornado's interaction with the surface. J. Atmos. Sci., 54, 581-605.
10. Markowski, P. M., J. M. Straka, and E. N. Rasmussen, 2002: Direct surface thermodynamic observations within the rear-flank downdrafts of nontornadic and tornadic supercells. Mon. Wea. Rev., 130, 1692-1721.
11. Markowski, P. M., J. M. Straka, and E. N. Rasmussen, 2003: Tornadogenesis resulting from the transport of circulation by a downdraft: Idealized numerical simulations. J. Atmos. Sci., 60, 795-823.
12. Wakimoto, R. M., and C. Liu, 1998: The Garden City, Kansas, storm during VORTEX 95. Part II: The wall cloud and tornado. Mon. Wea. Rev., 126, 393-408.
13. Wakimoto, R. M., and H. Cai, 2000: Analysis of a nontornadic storm during VORTEX 95. Mon. Wea. Rev., 128, 565-592.
14. Walko, R. L., 1988: Plausibility of substantial dry adiabatic subsidence in a tornado core. J. Atmos. Sci., 45, 2251-2267.
15. Wurman, J., and C. R. Alexander, 2005: The 30 May 1998 Spencer, South Dakota, storm. Part II: Comparison of observed damage and radar-derived winds in tornadoes. Mon. Wea. Rev., 133, 97-119.
16. Xia, J., 2001: Large-eddy simulation of a three-dimensional, compressible tornado vortex. Ph.D. thesis, West Virginia University, 150 pp. [Available online at http://etd.wvu.edu/templates/ showETD.cfm?recnum=2216.]
17. Xia, J., W. S. Lewellen, and D. C. Lewellen, 2003: Influence of Mach number on tornado corner flow dynamics. J. Atmos. Sci., 60, 2820-2825.