Chapter 18 - Tornadoes.

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Presentation transcript:

Chapter 18 - Tornadoes

3 May 1999 radar animation http://severewx.atmos.uiuc.edu/18/050399.reflectivity.html

Velocity animation http://severewx.atmos.uiuc.edu/18/050399.velocity.html

Fujita Scale http://ivis.eps.pitt.edu/courses/hazards/lectures/19.pdf

Low Level Jet

Weak Convergence along Forward-Flank Reflectivity Gradient Courtesy: Jeff Beck (TTU) Mesocyclone #2 Mesocyclone #3 Weak Convergence along Forward-Flank Reflectivity Gradient Mesocyclone #1

Cyclic supercell pics RFGF RFGF meso meso

New Occluded Occluded New New Cherokee, OK 4/14/12 Occluded

Dumas, TX – VORTEX2 2010

Tornadogenesis During VORTEX2 (Limon, CO 6/11/2010)

Tornado Structure * Very strong near-surface radial inflow * Sharp transition to upward motion in center of vortex (corner region) * May develop two-celled structure (descent in center of vortex) – immediately precedes multiple vortex structure

In-situ pressure measurements of a tornado