WW2010
University of Illinois

WW2010
 
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Online Guides
 
  introduction
 
> meteorology
 
  remote sensing
 
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  projects, activities

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

Weather Forecasting
 
  introduction
 
  methods
 
  surface features
 
> temperatures
 
  precipitation

Temperatures
 
  cloud cover
 
  highs and lows
 
> temp advection
 
  snow cover
 
  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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Effects of Temperature Advection
on forecasted temperatures

Forecast Tip:
When forecasting temperatures, look at the temperatures upstream from the station for which you making a forecast. If they are warmer, that means warmer air is being transported towards your station and the temperature should rise. Put in another way, if there is warm advection occuring at a given station, expect the temperatures to increase. In contrast, if cold advection is occurring at a given station, expect the temperatures to drop.

Temperature advection refers to change in temperature caused by movement of air by the wind. Forecasting temperatures using advection involves looking at the wind direction at your forecasting site and the temperatures upstream (in the direction from which the wind is blowing).


For example, consider the two cities below. Assume that a temperature forecast is being made for the northern station, which has a reported temperature of 45 degrees. The northern station is cooler than the southern station, but the wind directions are the same, out of the south. The wind is, in effect, blowing from the southern station towards the northern one. Over time, the wind will transport the warmer air located at the southern station towards the northern station (into a region of colder air), so expect the temperature at the northern station to rise. This process is called warm advection. When colder air is being transported by the wind into an area of warmer air, this is known as cold advection.



highs and lows
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.

snow cover