WW2010
University of Illinois

WW2010
 
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Reading Maps
 
  introduction
 
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> upper air maps

Upper Air Maps
 
  300 mb winds
 
  300 mb temps
 
  500 mb vorticity
 
> 500 mb temps
 
  700 mb humidity
 
  700 mb hum,winds
 
  700 mb vert velocity
 
  700 mb temps
 
  850 mb humidity
 
  850 mb hum,winds
 
  850 wind speed
 
  850 mb temps
 
  lifted index
 
  cape

User Interface
 
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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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500 mb Temps and Heights
upper air data

[Image: (28K)]
Reference Weather Map

Current Weather Map

This panel shows the latest 500 mb fields for geopotential height, temperature and wind vectors. 500 mb charts depict conditions in the middle troposphere (roughly 5000 meters).

Geopotential height approximates the actual height of a pressure surface above mean sea-level and is represented by the solid white contours. The geopotential height field is given in meters with an interval of 60 meters between height lines. The 500 mb height field encircling the globe consists of a series of troughs and ridges, which are the upper air counterparts of surface cyclones and anticyclones. The distance from trough to trough (or ridge to ridge) is known as a long wave. Embedded within the long waves are short waves, which are smaller disturbances often responsible for triggering surface cyclone development.

Temperature is represented by the color filled regions and the associated values are indicated by the color code located in the lower left corner of the forecast panel. Temperatures are given in degrees Celsius with an interval of 5 degrees Celsius between temperature contours, also called isotherms.

Examination of the height and temperature fields reveal regions of cold advection (into a trough) and warm advection (into a ridge). These processes act to amplify the wave in the geopotential height field, intensifying vertical motions and providing energy for a developing cyclone.



500 mb vorticity
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.

700 mb humidity