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Mesoscale Discussion 102
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   Mesoscale Discussion 0102
   NWS Storm Prediction Center Norman OK
   1144 PM CST Tue Jan 24 2023

   Areas affected...southern portions of IL...IN...and OH

   Concerning...Heavy snow 

   Valid 250544Z - 251145Z

   SUMMARY...Broad precipitation will continue to overspread the region
   from around 06-12z. Localized heavy snowfall rates greater than
   1"/hr will be possible.

   DISCUSSION...The low-level precipitation field continues to expand
   in advance of a negatively tilted upper-level trough ejecting over
   the central CONUS. Snowfall rates of 1"/hr have been reported from
   eastern OK northeastward through southeastern MO, and in some areas
   localized snowfall rates around 2"/hr have been observed. The broad
   precipitation band responsible for these snowfall rates continues to
   translate northeastward in tandem with 700-mb frontogenesis and
   mesoscale isentropic ascent. These features are expected to persist
   for the next several hours and produce 1"/hr snowfall rates through
   12z, generally advancing from west to east across the outlined area.
   Snowfall rates of 2"/hr or greater will be possible in localized
   areas where enhanced forcing overlaps non-zero potential buoyancy
   (10-20 J/kg MUCAPE) in the dendritic growth zone.

   ..Flournoy/Moore.. 01/25/2023

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

   ATTN...WFO...PBZ...RLX...CLE...ILN...LMK...IWX...IND...PAH...
   ILX...LSX...

   LAT...LON   37198956 37399036 37929051 38469002 39188841 39818684
               40478462 40608266 40298174 39718176 39148221 38908311
               38748421 38478545 38188653 37648835 37198956 

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Page last modified: January 25, 2023
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