WW2010
University of Illinois

WW2010
 
  welcome
 
> online guides
 
  archives
 
  educational cd-rom
 
  current weather
 
  about ww2010
 
  index

Online Guides
 
  introduction
 
> meteorology
 
  remote sensing
 
  reading maps
 
  projects, activities

Meteorology
 
  introduction
 
  air masses, fronts
 
  clouds, precipitation
 
  el nino
 
  forces, winds
 
  hurricanes
 
  hydrologic cycle
 
  light, optics
 
  midlatitude cyclones
 
> severe storms
 
  weather forecasting

Severe Storms
 
  introduction
 
  dangers of t-storms
 
  types of t-storms
 
> tstorm components
 
  tornadoes
 
  modeling

Tstorm Components
 
  introduction
 
  updrafts/downdrafts
 
  wind shear
 
  outflow phenomena
 
> wall clouds

Wall Clouds
 
  introduction
 
  beneath cb towers
 
> short-lived
 
  cyclic wall clouds
 
  with rotation

User Interface
 
  graphics
> text

NOTE: We've guessed that you're not using a client that supports colored tables and have tried to compensate. Low graphics mode looks much better on clients that do... we recommend switching to Netscape 3.0 or Microsoft Internet Explorer.
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Interaction with Thunderstorm Outflow
a short-lived example

This fearsome looking wall cloud to our northwest did occur with a severe thunderstorm which produced golf ball size hail and strong winds. However, within 10 minutes the wall cloud began to break up as cold outflow undercut it.

[Image: wall cloud undercut by gust front (67K)]
Photograph by: Moller

Note the tendency for the same wall cloud to look more disorganized as it "gusted out," or was undercut by outflow.

[Image: 10 minutes later (68K)]
Photograph by: Doswell

In addition to the lack of persistence, the wall cloud exhibited little if any rotation. It completely disappeared within another 5 minutes.


beneath CB towers
Terms for using data resources. CD-ROM available.
Credits and Acknowledgments for WW2010.
Department of Atmospheric Sciences (DAS) at
the University of Illinois at Urbana-Champaign.

cyclic wall clouds