WW2010
University of Illinois

WW2010
 
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Online Guides
 
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Reading Maps
 
  introduction
 
  utc conversions
 
  temp conversions
 
  surface obs
 
> surface maps
 
  upper air obs

Surface Maps
 
  temperature maps
 
  dew point maps
 
> pressure maps
 
  observation maps

Pressure Maps
 
  sea level pressure
 
> pressure & wind
 
  pres, ir sat
 
  pres, ir sat, wind

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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Pressure and Wind Vectors

[Image: (34K)]
Reference Weather Map

Current Weather Map

This panel depicts sea-level pressure and surface wind vectors. This chart is useful for finding fronts and high and low pressure systems.

The green arrows represent wind vectors. Wind vectors show wind direction and wind speed. The arrows point in the direction the wind is blowing and the longer the wind vector the stronger the wind. From the map above you can easily find warm, cold, occluded, and stationary fronts. Fronts are usually located in areas where winds come together and change direction. Low and high pressure systems can also be located from the map above. Winds around a low pressure system move counter-clockwise (cyclonic) and in towards the center. While winds in high pressure move clockwise (anticylonic) and out away from the center.

The solid white contours represent pressure contours (isobars) in millibars. The isobars have an interval of 4 millibars. The wind speed is directly related to the distance between the isobars, The closer they are together, the stronger the pressure gradient, and the stronger the wind.

For more information on how pressure affects the weather go to our forces and winds.



sea level pressure
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.

pres, ir sat