Chapter 7

Problems

1. Verify Eq. (7.5), which relates the environmental shear vector to the environmental horizontal vorticity vector ... See: Pr7.1

2. Prove that the dynamic pressure forcing (7.14) can be re-expressed as (7.15), i.e., in terms of so-called “splat” and “spin” (divergence and rotation).       

3. Show that during the early stage of supercell development, the net circulation is zero about the midlevel updraft, in the general case of unidirectional environmental vertical wind shear ... See: Pr7.3

Exercises

1. Use the idealized model CM1 to demonstrate the relationship between characteristics of the environmental wind shear and supercell evolution ... See: Ex7.1

Cases

1. Tornadic supercell on 5 May 2007 at ~0130 UTC, as observed by the Dodge City, Kansas (KDDC) WSR-88D. This supercell evolved out of a splitting cell, beginning ~2230 UTC (4 May) in western Oklahoma . An overview of this event can be found at: http://www.spc.noaa.gov/exper/archive/event.php?date=20070504

2. Line of tornadic supercells on 27 April 2011. There are many periods during this historical tornado outbreak that are worthy of study. For example, consider the period from ~2100 to 2230 UTC, from the perspective of the Birmingham, AL (KBMX) WSR-88D. An overview of this event can be found at: http://www.spc.noaa.gov/exper/archive/event.php?date=20110427

3. Cell split on 28 May 2013 at ~2300 UTC, as observed by the Topeka, Kansas (KTWX) WSR-88D. The splitting resulted in pronounced right and left movers in the vicinity of Salina, Kansas; the right mover produced a tornado. An overview of this event can be found at: http://www.spc.noaa.gov/exper/archive/event.php?date=20130528

 

 

   
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