Mesoscale Discussion 0085
   NWS Storm Prediction Center Norman OK
   0829 AM CST Sun Jan 22 2023

   Areas affected...portions of southwest into central Ohio

   Concerning...Heavy snow 

   Valid 221429Z - 221730Z

   SUMMARY...Bouts of heavy snow are likely through the morning. 1+
   inch/hour rates may briefly occur in spots.

   DISCUSSION...Deep-layer warm-air/moisture advection is taking place
   across the eastern OH Valley into the central Appalachians in
   response to an approaching mid-level trough. Across southwest into
   central OH, sub-freezing tropospheric profiles are in place, where
   heavy snow reports have also recently been received. RAP forecast
   soundings depict near saturation from the surface to 700 mb,
   suggesting ample moisture for efficient snowfall production exists
   within the dendritic growth zone (roughly -12 to -17C layer). As
   such, heavy snow (including 1+ inch/hr rates) may continue for the
   next couple of hours across southwest into central OH, as also
   depicted by recent runs of the HRRR. Thereafter, the strong warm-air
   advection may warm the lower levels to above-freezing temperatures
   across eastern OH, where a transition to a wintry mix is likely.

   ..Squitieri.. 01/22/2023

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

   ATTN...WFO...PBZ...CLE...ILN...

   LAT...LON   39588470 40018435 40678324 41088235 41188160 40908119
               40478142 40138236 39618332 39338381 39358400 39418447
               39588470