WW2010
University of Illinois

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

Archives
 
> case studies

Case Studies
 
  introduction
 
> veterans day snow
 
  hurricane andrew
 
  4/19 il tornadoes
 
  superstorm '93

Veterans Day Snow
 
  introduction
 
  personal perspective
 
> data and analysis
 
  advanced topics

Data and Analysis
 
  introduction
 
  snowfall totals
 
  radar imagery
 
  upper air data
 
> surface analysis
 
  lake erie temps
 
  weather statements

Surface Analysis
 
  introduction
 
  nov 10, 1996 04z
 
  nov 10, 1996 10z
 
  nov 11, 1996 13z
 
  nov 11, 1996 19z
 
  nov 12, 1996 03z
 
> nov 12, 1996 19z
 
  nov 13, 1996 03z

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.
.
November 12, 1996, 19Z
surface data analysis

By early afternoon on November 12, 1996, temperatures remain slightly below freezing throughout the immediate Great Lakes region. A new feature on the surface analysis, is the leading edge of a surface high pressure ridge nosing into SW Illinois.

This is an early sign that the eastern trough and cold air are beginning a slow lift to the north and east. However, the lake effect squalls persist through Thursday afternoon into the eastern lakes, so the stabilizing and drying of the air mass anchored in this region is very slow to give up ground.

The thermal troughs are less pronounced on this date, especially east of Lake Michigan. The wind shift on either side of the trough axis is less and there is no sharp southward "kinking" of the isobars - which is a good way of identifying such features.

Overall the flow is backing to a more westerly and WSW direction. Over Lake Erie this resulted in lake effect snowbands shifting slightly northward and moving up the shoreline towards Ashtabula county and NW Pennsylvania. The secondary snowbelt in NE Ohio, south of downtown Cleveland and eastward towards Youingstown, has stopped receiving much lake effect snow.

Communities close to Lake Erie in Lake and Ashtabula county received their heaviest snowfall beginning in the late afternoon and into the nighttime hours - where again, the squalls intensify.



Nov 12, 1996 03z
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.

Nov 13, 1996 03z