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

Radar Imagery
 
  nov 10, 1996
 
  nov 11, 1996
 
> nov 12, 1996
 
  nov 13, 1996

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.
.
Tuesday November 12, 1996
radar imagery

On Monday evening (November 12, 1996 01Z) strong lake effect snowbands have reenergized on the NE Ohio lakeshore. This was a night of very heavy snow in the north half of Geauga County where the town of Chardon is located. Little snow was received west of downtown Cleveland or at Cleveland Hopkins Airport where the National Weather Service (NWSFO) is located. The main band forms (according to the first appearance of low reflectivity) just beyond the western basin of Lake Erie and continues inland to northern Trumbull County near Youngstown (and beyond). This straight band is often associated with heavier snowfall and higher reflectivity cores compared to bands with some curvature.

The National Lightning Detection System (NLDS) data was analyzed during this period. Very few lightning strokes were detected during this period - these were mostly over the lake near Lost Nation Airport in Lake County. However, it is believed that in this storm lightning strokes were mostly cloud-to-cloud (CC) or in-cloud (IC) and were not detected by NLDS since local observers and spotter reports of lightning and thunder during this evening were so widespread.

[Image: KCLE on 11/12/96 0125z (29K)]

By the afternoon of November 12, a similar pattern as the previous day has taken shape. "Benard" cells (Benard cells tend to be circular, random, and smaller in scale compared to lake snowbands) have redeveloped through the region with some weaker LES bands developing near the eastern shores of Lake Erie.

[Image: KCLE on 11/12/96 1925z (34K)]

A zone of cell-free radar volume is found in the SE quadrant of the radar display; i.e. on a line from Cleveland (CLE) to near Zainesville (ZZV). One possible explanation for this lack of cellular convection, may be existing snowcover in this region. Snowcover will inhibit heating of the ground and will help to stabilize the lower surface and mixed layer in this area. Stronger returns are found in NE Ohio where the snowcover is extensive - but, this is not a result of local ground heating processes; instead, these are generated through interaction with Lake Erie.



Nov 11, 1996
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