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

Clouds, Precipitation
 
  introduction
 
  development
 
  cloud types
 
> precipitation

Precipitation
 
  introduction
 
  rain and hail
 
> freezing rain
 
  sleet
 
  snow

Freezing Rain
 
  definition
 
  dangers
 
> regions
 
  processes
 
  conditions
 
  forecasting

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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Regions of Freezing Rain
generally east of the Rocky Mountains

Except for extreme southern portions of the United States, almost any area east of the Rocky Mountains can experience freezing rain. The area most frequently hit by freezing rain extends over a broad region from Texas northward to Minnesota and then eastward into the Middle Atlantic states and New England.

[Image: Favored regions of freezing rain (26K)]

Freezing rain generally does not fall west of the Rockies because one of the key ingredients is missing; shallow arctic air, which is unable to flow over the mountains. The only regions in the West that experience freezing rain are near the Columbia River in southern Washington and northern Oregon. Freezing rain occurs when cold air gets caught in the river valleys and warm moist Pacific air rides over top, creating a favorable set-up for freezing rain.



Dangers
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.

processes