Mesoscale Discussion 0062
   NWS Storm Prediction Center Norman OK
   1201 AM CST Sat Jan 18 2020

   Areas affected...Northeastern IL...Central/Northern IN...Western OH

   Concerning...Freezing rain 

   Valid 180601Z - 181000Z

   SUMMARY...Greatest freezing rain potential will extend from
   northeastern Illinois into western Ohio. Freezing rain rates could
   exceed 0.05"/hr.

   DISCUSSION...Well-defined warm conveyor has evolved from
   MO-IL/IN-Lower MI. Strong isentropic ascent ahead of a pronounced
   short-wave trough will continue through the night and a broad
   corridor of precipitation should gradually shift from west to east
   across the Mid-MS/OH Valley region. Strong warm advection has
   gradually raised surface temperatures above freezing across much of
   MO into central IL and substantial boundary-layer warming is
   expected to change freezing rain to rain by 12z across much of IN.
   Forecast soundings support this with strong warming at 850mb as
   50-60kt LLJ strengthens across the OH Valley. Freezing rain threat
   should linger across northeast IN into western OH through 12z.

   ..Darrow.. 01/18/2020

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...ILN...IWX...IND...LOT...ILX...

   LAT...LON   41878783 41718654 41428588 40648359 39718382 39708629
               40408767 41878783