supercell (see Supercell)
tornadic, 224, 253, 263, 265, 291-294, 297-
312, 478
Tilting, 38, 252, 253, 264, 285, 291-294, 297,
299,361,391,403,441,458,460,506,511-
512,521,534
Top-hat profile, 232
Tornado,
122,211,222,249,253,265,268,318,
321
at cold front, 478
nonsupercell, 295-297
structure and life cycle, 297-301
suction vortices, 301
supercell, 278, 291-295
vortex dynamics, 301-312
Trailing stratiform region
(see Squall line with
trailing stratiform precipitation)
Transition zone, 374
Trapped wave
(see Lee wave)
Tropical
cyclone
(see Hurricane)
mesoscale convective systems, 202, 213, 259,
337,340-341,346
Tropopause, 4,
13,23,218,221,335,361,383,
400,453
Troposphere, 4, 8
Turbulence, 411, 417-418
as source of potential vorticity
(see Fric-
tional, source of potential vorticity)
associated with Kelvin-Helmholtz instability,
61
detected by radar
(see Radar, turbulence)
in altocumulus and altostratus, 192-193
in boundary layer, 65-68, 107, 155-174,301
in cirriform clouds, 179-180, 183, 185-188
in cumulus, 226-227, 234, 239, 257-258, 262,
264, 266-267, 405
in extratropical cyclones, 477, 484
in fog, 9, 137-152
in gust front, 314-315
in hurricanes, 411, 417-418, 421
in hydraulic jump, 516, 519-520
in mesoscale convective system, 385
in models, 262, 264, 266-267
in nimbostratus, 197,218-220
in rotor cloud, 516, 520
in stratus and stratocumulus, 137-140, 155-
174,501
in three-dimensional model, 266
in tornado, 301, 307, 309-311
in wave clouds, 20, 520
K-Theory, 65-66, 145
Turbulent fluxes
(see Eddy flux)
Index
569
Turbulent kinetic energy, 66, 139, 155, 161-163
buoyancy generation, 143, 155, 163, 226
conversion from mean-flow, 143, 155, 163,
226
dissipation, 163
pressure-velocity correlation, 163
shear and buoyancy generation, 226
Upslope flow, 502, 531-534, 538
van't Hoff factor, 75
Vapor
deposition
(see Deposition)
diffusion
(see Diffusion)
Vault
(see Supercell, bounded weak echo re-
gion)
Ventilation, 75, 88
Virga, 8, 175, 177, 194
Vortex
breakdown, 309-310
one-cell, 306-307, 309
Rankine, 304-307, 311
sheet, 57
swirl ratio, 308-309, 311
two-cell, 307-309, 311
tubes
(see Stretching, Tilting)
Vorticity, 38, 186,288
absolute, 38, 48
baroclinic generation, 38, 249-251, 253, 293,
319,330,367,390-391,478,504-505,521
equation(s), 38-40, 46, 52, 130, 185, 249, 253,
263,299,367,403,447,521-523
equivalent potential, 40
geostrophic equivalent potential, 40, 461,
483-484
in cumulus clouds, 247-253
in lines of thunderstorms, 329-333
in mesoscale convective systems, 367, 389-
394, 401-404
in non-supercell tornado, 295-297
in regions of hurricane formation, 406
in supercell thunderstorms, 288-295
in tornadoes and waterspouts, 297-312
potential, 32, 39-40, 50, 52, 56, 457-463, 491
stretching of
(see Stretching)
tilting of
(see Tilting)
Wake low, 351-353, 379, 383
Wall cloud
Fohn, 20, 513
in thunderstorm, 278, 299